/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:15:08,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:15:08,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:15:08,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:15:08,475 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-Separate.epf [2021-06-05 15:15:08,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:15:08,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:15:08,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:15:08,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:15:08,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:15:08,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:15:08,516 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:15:08,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:15:08,516 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:15:08,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:15:08,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:15:08,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:15:08,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:15:08,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:15:08,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:15:08,518 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:15:08,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:15:08,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:15:08,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:15:08,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:15:08,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:15:08,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:15:08,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:15:08,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:15:08,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:15:08,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:15:08,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:15:08,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:15:08,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:15:08,519 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:15:08,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:15:08,520 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:15:08,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:15:08,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:15:08,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:15:08,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:15:08,859 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:15:08,861 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:15:08,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-06-05 15:15:08,876 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-06-05 15:15:08,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:15:08,923 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:15:08,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:15:08,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:15:08,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:15:08,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:15:08,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:15:08,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:15:08,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:15:08,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/1) ... [2021-06-05 15:15:08,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:15:08,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:15:08,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:15:08,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:15:08,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (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 15:15:09,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:15:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:15:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:15:09,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:15:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:15:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:15:09,022 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:15:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:15:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:15:09,023 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 15:15:09,265 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:15:09,265 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 15:15:09,265 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 15:15:09,267 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:15:09 BoogieIcfgContainer [2021-06-05 15:15:09,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:15:09,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:15:09,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:15:09,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:15:09,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:15:08" (1/2) ... [2021-06-05 15:15:09,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a9def8e and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:15:09, skipping insertion in model container [2021-06-05 15:15:09,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:15:09" (2/2) ... [2021-06-05 15:15:09,273 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-06-05 15:15:09,277 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:15:09,278 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:15:09,278 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:15:09,278 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:15:09,327 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 15:15:09,363 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 15:15:09,396 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:15:09,396 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:15:09,396 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:15:09,396 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:15:09,419 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:15:09,420 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:15:09,420 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:15:09,420 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:15:09,428 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2021-06-05 15:15:09,452 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 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 15:15:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 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 15:15:09,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 15:15:09,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:09,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:09,461 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:09,469 INFO L82 PathProgramCache]: Analyzing trace with hash 10984786, now seen corresponding path program 1 times [2021-06-05 15:15:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:09,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029100842] [2021-06-05 15:15:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:09,623 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 15:15:09,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:09,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029100842] [2021-06-05 15:15:09,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029100842] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:15:09,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:15:09,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:15:09,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749781408] [2021-06-05 15:15:09,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:15:09,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:15:09,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:15:09,648 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:09,675 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2021-06-05 15:15:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:15:09,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 15:15:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:09,690 INFO L225 Difference]: With dead ends: 54 [2021-06-05 15:15:09,690 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 15:15:09,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:15:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 15:15:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-06-05 15:15:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 35 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 15:15:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 70 transitions. [2021-06-05 15:15:09,722 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 70 transitions. Word has length 11 [2021-06-05 15:15:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:09,723 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 70 transitions. [2021-06-05 15:15:09,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 70 transitions. [2021-06-05 15:15:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 15:15:09,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:09,724 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:09,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:15:09,725 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1844506957, now seen corresponding path program 1 times [2021-06-05 15:15:09,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:09,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757230702] [2021-06-05 15:15:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:09,750 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 15:15:09,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:09,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757230702] [2021-06-05 15:15:09,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757230702] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:15:09,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:15:09,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:15:09,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499186067] [2021-06-05 15:15:09,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:15:09,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:15:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:15:09,754 INFO L87 Difference]: Start difference. First operand 36 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:09,762 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2021-06-05 15:15:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:15:09,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 15:15:09,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:09,764 INFO L225 Difference]: With dead ends: 37 [2021-06-05 15:15:09,764 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 15:15:09,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:15:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 15:15:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-05 15:15:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 15:15:09,770 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2021-06-05 15:15:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:09,770 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 15:15:09,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 15:15:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:15:09,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:09,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:09,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:15:09,772 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash 244145385, now seen corresponding path program 1 times [2021-06-05 15:15:09,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:09,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830481645] [2021-06-05 15:15:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:09,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:09,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830481645] [2021-06-05 15:15:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830481645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:09,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926988966] [2021-06-05 15:15:09,868 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 15:15:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:15:09,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:15:10,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:10,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:10,060 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 15:15:10,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 15:15:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:10,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926988966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:10,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:10,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 15:15:10,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858892450] [2021-06-05 15:15:10,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:15:10,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:10,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:15:10,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:15:10,086 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:10,134 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-06-05 15:15:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:15:10,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 15:15:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:10,136 INFO L225 Difference]: With dead ends: 67 [2021-06-05 15:15:10,136 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 15:15:10,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:15:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 15:15:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-06-05 15:15:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2021-06-05 15:15:10,142 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 16 [2021-06-05 15:15:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:10,143 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2021-06-05 15:15:10,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2021-06-05 15:15:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:15:10,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:10,144 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:10,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 15:15:10,357 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:10,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1749319479, now seen corresponding path program 1 times [2021-06-05 15:15:10,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:10,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846832555] [2021-06-05 15:15:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:15:10,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:10,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846832555] [2021-06-05 15:15:10,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846832555] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:15:10,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:15:10,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:15:10,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077670106] [2021-06-05 15:15:10,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:15:10,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:15:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:15:10,378 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:10,391 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-06-05 15:15:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:15:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 15:15:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:10,393 INFO L225 Difference]: With dead ends: 52 [2021-06-05 15:15:10,393 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 15:15:10,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:15:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 15:15:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-06-05 15:15:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-06-05 15:15:10,398 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 16 [2021-06-05 15:15:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:10,398 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-06-05 15:15:10,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-06-05 15:15:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:15:10,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:10,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:10,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:15:10,400 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1115470710, now seen corresponding path program 2 times [2021-06-05 15:15:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:10,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945318846] [2021-06-05 15:15:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:10,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:10,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945318846] [2021-06-05 15:15:10,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945318846] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:15:10,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:15:10,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:15:10,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975748541] [2021-06-05 15:15:10,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:15:10,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:10,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:15:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:15:10,481 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:10,504 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-06-05 15:15:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:15:10,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 15:15:10,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:10,509 INFO L225 Difference]: With dead ends: 116 [2021-06-05 15:15:10,510 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 15:15:10,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:15:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 15:15:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-06-05 15:15:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-06-05 15:15:10,522 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 18 [2021-06-05 15:15:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:10,522 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-06-05 15:15:10,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-06-05 15:15:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:15:10,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:10,524 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:10,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:15:10,524 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash -686636110, now seen corresponding path program 3 times [2021-06-05 15:15:10,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:10,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348833618] [2021-06-05 15:15:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:15:10,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:10,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348833618] [2021-06-05 15:15:10,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348833618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:10,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130521185] [2021-06-05 15:15:10,575 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 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 15:15:10,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:10,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:10,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:15:10,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:15:10,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130521185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:10,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:10,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 15:15:10,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207120433] [2021-06-05 15:15:10,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:15:10,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:10,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:15:10,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:15:10,672 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:10,682 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2021-06-05 15:15:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:15:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:15:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:10,683 INFO L225 Difference]: With dead ends: 118 [2021-06-05 15:15:10,683 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 15:15:10,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:15:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 15:15:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-06-05 15:15:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-06-05 15:15:10,693 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 21 [2021-06-05 15:15:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:10,693 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-06-05 15:15:10,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,693 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-06-05 15:15:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:15:10,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:10,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:10,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:10,895 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1614866322, now seen corresponding path program 1 times [2021-06-05 15:15:10,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:10,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942652795] [2021-06-05 15:15:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:11,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:11,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942652795] [2021-06-05 15:15:11,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942652795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:11,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042084924] [2021-06-05 15:15:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:15:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:11,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:15:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:11,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:11,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:11,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:11,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 15:15:11,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:11,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:11,393 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 15:15:11,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-06-05 15:15:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:11,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042084924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:11,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:11,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 15:15:11,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78380442] [2021-06-05 15:15:11,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:15:11,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:15:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:15:11,418 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:11,527 INFO L93 Difference]: Finished difference Result 175 states and 364 transitions. [2021-06-05 15:15:11,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:15:11,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:15:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:11,529 INFO L225 Difference]: With dead ends: 175 [2021-06-05 15:15:11,530 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 15:15:11,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:15:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 15:15:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2021-06-05 15:15:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 118 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 242 transitions. [2021-06-05 15:15:11,549 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 242 transitions. Word has length 21 [2021-06-05 15:15:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:11,550 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 242 transitions. [2021-06-05 15:15:11,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 242 transitions. [2021-06-05 15:15:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:15:11,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:11,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:11,761 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:11,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:11,761 INFO L82 PathProgramCache]: Analyzing trace with hash 466490442, now seen corresponding path program 2 times [2021-06-05 15:15:11,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:11,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714583877] [2021-06-05 15:15:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:11,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:11,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714583877] [2021-06-05 15:15:11,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714583877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:11,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704713430] [2021-06-05 15:15:11,899 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 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 15:15:11,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:11,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:15:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:12,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:12,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:12,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 15:15:12,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:12,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:12,117 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 15:15:12,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-06-05 15:15:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:12,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704713430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:12,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:12,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 15:15:12,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986598798] [2021-06-05 15:15:12,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:15:12,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:15:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:15:12,134 INFO L87 Difference]: Start difference. First operand 119 states and 242 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:12,254 INFO L93 Difference]: Finished difference Result 209 states and 432 transitions. [2021-06-05 15:15:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:15:12,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:15:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:12,257 INFO L225 Difference]: With dead ends: 209 [2021-06-05 15:15:12,257 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 15:15:12,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:15:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 15:15:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 123. [2021-06-05 15:15:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 249 transitions. [2021-06-05 15:15:12,277 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 249 transitions. Word has length 21 [2021-06-05 15:15:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:12,277 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 249 transitions. [2021-06-05 15:15:12,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 249 transitions. [2021-06-05 15:15:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:15:12,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:12,284 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:12,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:12,485 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash -870312972, now seen corresponding path program 3 times [2021-06-05 15:15:12,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:12,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798879438] [2021-06-05 15:15:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:12,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798879438] [2021-06-05 15:15:12,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798879438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723707691] [2021-06-05 15:15:12,631 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 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 15:15:12,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:12,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:12,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:15:12,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:12,777 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:15:12,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 15:15:12,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:12,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:12,786 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 15:15:12,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 15:15:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:12,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723707691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:12,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:12,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 15:15:12,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554192145] [2021-06-05 15:15:12,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:15:12,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:15:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:15:12,806 INFO L87 Difference]: Start difference. First operand 123 states and 249 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 15:15:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:12,903 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-06-05 15:15:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:15:12,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 21 [2021-06-05 15:15:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:12,905 INFO L225 Difference]: With dead ends: 180 [2021-06-05 15:15:12,905 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 15:15:12,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:15:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 15:15:12,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-06-05 15:15:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.046511627906977) internal successors, (264), 129 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 264 transitions. [2021-06-05 15:15:12,910 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 264 transitions. Word has length 21 [2021-06-05 15:15:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:12,911 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 264 transitions. [2021-06-05 15:15:12,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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 15:15:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 264 transitions. [2021-06-05 15:15:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:12,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:12,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:13,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:13,125 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:13,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1631872213, now seen corresponding path program 4 times [2021-06-05 15:15:13,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:13,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398491425] [2021-06-05 15:15:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:13,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:13,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398491425] [2021-06-05 15:15:13,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398491425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:13,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152872874] [2021-06-05 15:15:13,163 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 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 15:15:13,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:13,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:15:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:13,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152872874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:13,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:13,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:15:13,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254947338] [2021-06-05 15:15:13,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:15:13,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:13,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:15:13,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:15:13,247 INFO L87 Difference]: Start difference. First operand 130 states and 264 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:13,266 INFO L93 Difference]: Finished difference Result 267 states and 530 transitions. [2021-06-05 15:15:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:15:13,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 15:15:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:13,268 INFO L225 Difference]: With dead ends: 267 [2021-06-05 15:15:13,268 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 15:15:13,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:15:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 15:15:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 163. [2021-06-05 15:15:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.0925925925925926) internal successors, (339), 162 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 339 transitions. [2021-06-05 15:15:13,274 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 339 transitions. Word has length 23 [2021-06-05 15:15:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:13,274 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 339 transitions. [2021-06-05 15:15:13,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 339 transitions. [2021-06-05 15:15:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:13,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:13,276 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:13,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:13,499 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:13,499 INFO L82 PathProgramCache]: Analyzing trace with hash 979925673, now seen corresponding path program 5 times [2021-06-05 15:15:13,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:13,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269004660] [2021-06-05 15:15:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:15:13,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269004660] [2021-06-05 15:15:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269004660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555367882] [2021-06-05 15:15:13,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:15:13,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:13,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:13,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:13,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:13,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:13,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:13,975 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 53 treesize of output 25 [2021-06-05 15:15:13,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:13,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:13,985 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 15:15:13,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:14,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555367882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:14,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:14,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 15:15:14,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486365852] [2021-06-05 15:15:14,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:15:14,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:14,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:15:14,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:15:14,007 INFO L87 Difference]: Start difference. First operand 163 states and 339 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 15:15:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:14,207 INFO L93 Difference]: Finished difference Result 337 states and 691 transitions. [2021-06-05 15:15:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:15:14,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 26 [2021-06-05 15:15:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:14,209 INFO L225 Difference]: With dead ends: 337 [2021-06-05 15:15:14,209 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 15:15:14,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 15:15:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 202. [2021-06-05 15:15:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0696517412935322) internal successors, (416), 201 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 416 transitions. [2021-06-05 15:15:14,216 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 416 transitions. Word has length 26 [2021-06-05 15:15:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:14,217 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 416 transitions. [2021-06-05 15:15:14,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 15:15:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 416 transitions. [2021-06-05 15:15:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:14,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:14,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:14,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:14,425 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash -494046431, now seen corresponding path program 6 times [2021-06-05 15:15:14,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:14,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377051436] [2021-06-05 15:15:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:14,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377051436] [2021-06-05 15:15:14,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377051436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684414025] [2021-06-05 15:15:14,609 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 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 15:15:14,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:15:14,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:14,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:14,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:14,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:14,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:14,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:14,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:14,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:14,896 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 53 treesize of output 25 [2021-06-05 15:15:14,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:14,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:14,908 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 15:15:14,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:14,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684414025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:14,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:14,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 15:15:14,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610494519] [2021-06-05 15:15:14,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:14,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:14,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:14,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:14,921 INFO L87 Difference]: Start difference. First operand 202 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:15,087 INFO L93 Difference]: Finished difference Result 375 states and 785 transitions. [2021-06-05 15:15:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:15:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:15,089 INFO L225 Difference]: With dead ends: 375 [2021-06-05 15:15:15,089 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 15:15:15,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 15:15:15,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 214. [2021-06-05 15:15:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.056338028169014) internal successors, (438), 213 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 438 transitions. [2021-06-05 15:15:15,096 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 438 transitions. Word has length 26 [2021-06-05 15:15:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:15,096 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 438 transitions. [2021-06-05 15:15:15,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 438 transitions. [2021-06-05 15:15:15,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:15,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:15,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:15,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 15:15:15,319 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash 960569099, now seen corresponding path program 7 times [2021-06-05 15:15:15,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:15,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732468155] [2021-06-05 15:15:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:15,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:15,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732468155] [2021-06-05 15:15:15,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732468155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:15,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680842726] [2021-06-05 15:15:15,495 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 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 15:15:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:15,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:15,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:15,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:15,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:15,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:15,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:15,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:15,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:15,767 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 53 treesize of output 25 [2021-06-05 15:15:15,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:15,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:15,776 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 15:15:15,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:15,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680842726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:15,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:15,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 15:15:15,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366664678] [2021-06-05 15:15:15,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:15,792 INFO L87 Difference]: Start difference. First operand 214 states and 438 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:15,944 INFO L93 Difference]: Finished difference Result 372 states and 766 transitions. [2021-06-05 15:15:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:15:15,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:15,946 INFO L225 Difference]: With dead ends: 372 [2021-06-05 15:15:15,946 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 15:15:15,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 15:15:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 217. [2021-06-05 15:15:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0555555555555554) internal successors, (444), 216 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 444 transitions. [2021-06-05 15:15:15,953 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 444 transitions. Word has length 26 [2021-06-05 15:15:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:15,954 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 444 transitions. [2021-06-05 15:15:15,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 444 transitions. [2021-06-05 15:15:15,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:15,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:15,955 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:16,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:16,176 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:16,176 INFO L82 PathProgramCache]: Analyzing trace with hash -30244623, now seen corresponding path program 8 times [2021-06-05 15:15:16,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:16,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49623970] [2021-06-05 15:15:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:15:16,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:16,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49623970] [2021-06-05 15:15:16,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49623970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:16,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97283532] [2021-06-05 15:15:16,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:15:16,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:16,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:16,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:16,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:16,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:16,602 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 53 treesize of output 25 [2021-06-05 15:15:16,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:16,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:16,613 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 15:15:16,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:16,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97283532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:16,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:16,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 15:15:16,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124866483] [2021-06-05 15:15:16,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:15:16,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:15:16,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:15:16,626 INFO L87 Difference]: Start difference. First operand 217 states and 444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 15:15:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:16,792 INFO L93 Difference]: Finished difference Result 548 states and 1112 transitions. [2021-06-05 15:15:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:15:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 26 [2021-06-05 15:15:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:16,794 INFO L225 Difference]: With dead ends: 548 [2021-06-05 15:15:16,794 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 15:15:16,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 15:15:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 247. [2021-06-05 15:15:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.024390243902439) internal successors, (498), 246 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 498 transitions. [2021-06-05 15:15:16,802 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 498 transitions. Word has length 26 [2021-06-05 15:15:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:16,802 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 498 transitions. [2021-06-05 15:15:16,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 15:15:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 498 transitions. [2021-06-05 15:15:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:16,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:16,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:17,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:17,026 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:17,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1504216727, now seen corresponding path program 9 times [2021-06-05 15:15:17,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:17,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682988904] [2021-06-05 15:15:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:17,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:17,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682988904] [2021-06-05 15:15:17,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682988904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:17,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275671815] [2021-06-05 15:15:17,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:15:17,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:17,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:17,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:15:17,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:17,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:17,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:17,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:17,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:17,560 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 49 treesize of output 25 [2021-06-05 15:15:17,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:17,577 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-06-05 15:15:17,579 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 15:15:17,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:10 [2021-06-05 15:15:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:17,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275671815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:17,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:17,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 15:15:17,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080858566] [2021-06-05 15:15:17,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:17,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:17,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:17,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:17,596 INFO L87 Difference]: Start difference. First operand 247 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:18,025 INFO L93 Difference]: Finished difference Result 598 states and 1212 transitions. [2021-06-05 15:15:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:18,028 INFO L225 Difference]: With dead ends: 598 [2021-06-05 15:15:18,028 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 15:15:18,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 15:15:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 235. [2021-06-05 15:15:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-06-05 15:15:18,037 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-06-05 15:15:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:18,037 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-06-05 15:15:18,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-06-05 15:15:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:18,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:18,038 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:18,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:15:18,238 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash -49601197, now seen corresponding path program 10 times [2021-06-05 15:15:18,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:18,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637915405] [2021-06-05 15:15:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:18,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:18,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637915405] [2021-06-05 15:15:18,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637915405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:18,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941844608] [2021-06-05 15:15:18,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:18,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:18,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:18,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:18,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:18,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:18,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:18,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:18,673 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 53 treesize of output 25 [2021-06-05 15:15:18,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:18,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:18,684 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 15:15:18,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:18,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941844608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:18,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:18,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 15:15:18,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170456906] [2021-06-05 15:15:18,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:18,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:18,697 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:18,953 INFO L93 Difference]: Finished difference Result 470 states and 964 transitions. [2021-06-05 15:15:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:15:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:18,957 INFO L225 Difference]: With dead ends: 470 [2021-06-05 15:15:18,957 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 15:15:18,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 15:15:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-06-05 15:15:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-06-05 15:15:18,966 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-06-05 15:15:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:18,966 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-06-05 15:15:18,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,966 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-06-05 15:15:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:18,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:18,967 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:19,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:15:19,181 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 802414539, now seen corresponding path program 11 times [2021-06-05 15:15:19,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:19,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746857123] [2021-06-05 15:15:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:19,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:19,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746857123] [2021-06-05 15:15:19,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746857123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:19,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941325543] [2021-06-05 15:15:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:19,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:19,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:19,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:19,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:19,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:19,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:19,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:19,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:19,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:19,653 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 53 treesize of output 25 [2021-06-05 15:15:19,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:19,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:19,663 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 15:15:19,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:19,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941325543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:19,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:19,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 15:15:19,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475480034] [2021-06-05 15:15:19,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:19,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:19,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:19,676 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:19,922 INFO L93 Difference]: Finished difference Result 414 states and 855 transitions. [2021-06-05 15:15:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:15:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:19,925 INFO L225 Difference]: With dead ends: 414 [2021-06-05 15:15:19,925 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 15:15:19,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 15:15:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2021-06-05 15:15:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.05327868852459) internal successors, (501), 244 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 501 transitions. [2021-06-05 15:15:19,932 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 501 transitions. Word has length 26 [2021-06-05 15:15:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:19,932 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 501 transitions. [2021-06-05 15:15:19,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 501 transitions. [2021-06-05 15:15:19,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:19,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:19,933 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:20,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:15:20,145 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 509590407, now seen corresponding path program 12 times [2021-06-05 15:15:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:20,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380201191] [2021-06-05 15:15:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:15:20,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:20,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380201191] [2021-06-05 15:15:20,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380201191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:20,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298719493] [2021-06-05 15:15:20,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:20,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:15:20,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:20,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:20,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:20,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:20,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:20,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:20,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:20,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 treesize of output 25 [2021-06-05 15:15:20,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:20,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:20,526 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 15:15:20,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:20,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298719493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:20,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:20,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 15:15:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388192434] [2021-06-05 15:15:20,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:15:20,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:20,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:15:20,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:15:20,538 INFO L87 Difference]: Start difference. First operand 245 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:20,890 INFO L93 Difference]: Finished difference Result 610 states and 1221 transitions. [2021-06-05 15:15:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:20,893 INFO L225 Difference]: With dead ends: 610 [2021-06-05 15:15:20,893 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 15:15:20,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:15:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 15:15:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 293. [2021-06-05 15:15:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-06-05 15:15:20,900 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 26 [2021-06-05 15:15:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:20,900 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-06-05 15:15:20,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-06-05 15:15:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:20,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:20,901 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:21,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:21,124 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash -964381697, now seen corresponding path program 13 times [2021-06-05 15:15:21,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:21,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712345137] [2021-06-05 15:15:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:21,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:21,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712345137] [2021-06-05 15:15:21,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712345137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:21,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530388211] [2021-06-05 15:15:21,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:21,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:21,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:21,578 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 15:15:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:21,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:21,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:21,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 15:15:21,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:21,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:21,720 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 15:15:21,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:21,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530388211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:21,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:21,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 15:15:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600408411] [2021-06-05 15:15:21,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:15:21,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:21,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:15:21,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:15:21,761 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:22,115 INFO L93 Difference]: Finished difference Result 634 states and 1305 transitions. [2021-06-05 15:15:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:22,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:22,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:22,118 INFO L225 Difference]: With dead ends: 634 [2021-06-05 15:15:22,118 INFO L226 Difference]: Without dead ends: 581 [2021-06-05 15:15:22,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-05 15:15:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 290. [2021-06-05 15:15:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-06-05 15:15:22,139 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-06-05 15:15:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:22,139 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-06-05 15:15:22,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-06-05 15:15:22,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:22,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:22,140 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:22,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:22,373 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:22,373 INFO L82 PathProgramCache]: Analyzing trace with hash 490233833, now seen corresponding path program 14 times [2021-06-05 15:15:22,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:22,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448157875] [2021-06-05 15:15:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:22,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:22,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448157875] [2021-06-05 15:15:22,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448157875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:22,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399464442] [2021-06-05 15:15:22,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:22,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:22,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:22,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:22,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:22,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 15:15:22,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:22,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:22,958 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 15:15:22,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:22,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399464442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:22,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:22,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 15:15:22,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754611265] [2021-06-05 15:15:22,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:15:22,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:15:22,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:15:22,985 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:23,374 INFO L93 Difference]: Finished difference Result 541 states and 1096 transitions. [2021-06-05 15:15:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:23,383 INFO L225 Difference]: With dead ends: 541 [2021-06-05 15:15:23,383 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 15:15:23,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 15:15:23,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-06-05 15:15:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-06-05 15:15:23,407 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-06-05 15:15:23,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:23,407 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-06-05 15:15:23,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-06-05 15:15:23,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:23,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:23,408 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:23,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:23,622 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:23,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1342249569, now seen corresponding path program 15 times [2021-06-05 15:15:23,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:23,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652321035] [2021-06-05 15:15:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:23,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:23,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652321035] [2021-06-05 15:15:23,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652321035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:23,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856865519] [2021-06-05 15:15:23,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:23,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:23,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:23,869 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:23,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:24,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:24,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:24,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 15:15:24,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:24,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:24,222 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 15:15:24,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-05 15:15:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:24,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856865519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:24,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:24,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 15:15:24,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45853933] [2021-06-05 15:15:24,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:15:24,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:24,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:15:24,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:15:24,239 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:24,580 INFO L93 Difference]: Finished difference Result 524 states and 1067 transitions. [2021-06-05 15:15:24,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:24,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:24,595 INFO L225 Difference]: With dead ends: 524 [2021-06-05 15:15:24,595 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 15:15:24,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 15:15:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 272. [2021-06-05 15:15:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.992619926199262) internal successors, (540), 271 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 540 transitions. [2021-06-05 15:15:24,610 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 540 transitions. Word has length 26 [2021-06-05 15:15:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:24,610 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 540 transitions. [2021-06-05 15:15:24,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 540 transitions. [2021-06-05 15:15:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:15:24,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:24,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:24,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:15:24,849 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:24,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:24,849 INFO L82 PathProgramCache]: Analyzing trace with hash -931564597, now seen corresponding path program 16 times [2021-06-05 15:15:24,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:24,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106943772] [2021-06-05 15:15:24,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:25,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106943772] [2021-06-05 15:15:25,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106943772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:25,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729605074] [2021-06-05 15:15:25,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:25,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:25,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:25,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:25,281 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:15:25,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 15:15:25,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:25,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:25,296 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 15:15:25,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-05 15:15:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:25,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729605074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:25,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:25,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 15:15:25,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681235457] [2021-06-05 15:15:25,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:15:25,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:15:25,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:15:25,329 INFO L87 Difference]: Start difference. First operand 272 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:25,626 INFO L93 Difference]: Finished difference Result 369 states and 744 transitions. [2021-06-05 15:15:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:15:25,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:15:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:25,628 INFO L225 Difference]: With dead ends: 369 [2021-06-05 15:15:25,628 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 15:15:25,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 15:15:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 279. [2021-06-05 15:15:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.9964028776978417) internal successors, (555), 278 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 555 transitions. [2021-06-05 15:15:25,636 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 555 transitions. Word has length 26 [2021-06-05 15:15:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:25,636 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 555 transitions. [2021-06-05 15:15:25,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 555 transitions. [2021-06-05 15:15:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:15:25,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:25,637 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:25,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:15:25,857 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1396364564, now seen corresponding path program 17 times [2021-06-05 15:15:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:25,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438156842] [2021-06-05 15:15:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:25,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:25,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438156842] [2021-06-05 15:15:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438156842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:25,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416866810] [2021-06-05 15:15:25,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:25,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:15:25,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:15:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:26,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416866810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:26,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:26,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:15:26,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786872841] [2021-06-05 15:15:26,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:15:26,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:15:26,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:15:26,060 INFO L87 Difference]: Start difference. First operand 279 states and 555 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:26,097 INFO L93 Difference]: Finished difference Result 479 states and 948 transitions. [2021-06-05 15:15:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:15:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:15:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:26,099 INFO L225 Difference]: With dead ends: 479 [2021-06-05 15:15:26,100 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 15:15:26,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:15:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 15:15:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 320. [2021-06-05 15:15:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0250783699059562) internal successors, (646), 319 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 646 transitions. [2021-06-05 15:15:26,107 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 646 transitions. Word has length 28 [2021-06-05 15:15:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:26,107 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 646 transitions. [2021-06-05 15:15:26,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,107 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 646 transitions. [2021-06-05 15:15:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:26,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:26,108 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:26,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:15:26,338 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:26,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:26,338 INFO L82 PathProgramCache]: Analyzing trace with hash -160566182, now seen corresponding path program 18 times [2021-06-05 15:15:26,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:26,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6815607] [2021-06-05 15:15:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:15:26,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6815607] [2021-06-05 15:15:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6815607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411986392] [2021-06-05 15:15:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:26,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:15:26,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:26,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:26,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:27,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:27,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:27,280 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 72 treesize of output 32 [2021-06-05 15:15:27,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:27,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:27,291 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 15:15:27,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411986392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:27,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:27,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 15:15:27,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745067464] [2021-06-05 15:15:27,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:27,318 INFO L87 Difference]: Start difference. First operand 320 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:27,614 INFO L93 Difference]: Finished difference Result 708 states and 1436 transitions. [2021-06-05 15:15:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:15:27,614 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:15:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:27,616 INFO L225 Difference]: With dead ends: 708 [2021-06-05 15:15:27,616 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 15:15:27,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 15:15:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 392. [2021-06-05 15:15:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-06-05 15:15:27,640 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 31 [2021-06-05 15:15:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:27,640 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-06-05 15:15:27,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-06-05 15:15:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:27,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:27,641 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:27,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 15:15:27,869 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1308942062, now seen corresponding path program 19 times [2021-06-05 15:15:27,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:27,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150603795] [2021-06-05 15:15:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:28,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:28,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150603795] [2021-06-05 15:15:28,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150603795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:28,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150335185] [2021-06-05 15:15:28,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:28,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:28,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:28,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:28,540 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 72 treesize of output 32 [2021-06-05 15:15:28,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:28,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:28,551 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 15:15:28,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:28,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150335185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:28,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:28,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:28,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12859345] [2021-06-05 15:15:28,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:28,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:28,564 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:28,798 INFO L93 Difference]: Finished difference Result 810 states and 1669 transitions. [2021-06-05 15:15:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:15:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:28,801 INFO L225 Difference]: With dead ends: 810 [2021-06-05 15:15:28,801 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 15:15:28,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 15:15:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 413. [2021-06-05 15:15:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0072815533980584) internal successors, (827), 412 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 827 transitions. [2021-06-05 15:15:28,811 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 827 transitions. Word has length 31 [2021-06-05 15:15:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:28,812 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 827 transitions. [2021-06-05 15:15:28,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 827 transitions. [2021-06-05 15:15:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:28,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:28,813 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:29,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:15:29,037 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:29,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:29,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1649221820, now seen corresponding path program 20 times [2021-06-05 15:15:29,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:29,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48619412] [2021-06-05 15:15:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:29,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:29,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48619412] [2021-06-05 15:15:29,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48619412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:29,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101279198] [2021-06-05 15:15:29,300 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 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 15:15:29,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:29,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:29,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:29,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:29,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:29,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:29,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:29,741 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 72 treesize of output 32 [2021-06-05 15:15:29,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:29,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:29,752 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 15:15:29,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:29,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101279198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:29,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:29,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:29,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122575905] [2021-06-05 15:15:29,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:29,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:29,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:29,766 INFO L87 Difference]: Start difference. First operand 413 states and 827 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:30,104 INFO L93 Difference]: Finished difference Result 880 states and 1806 transitions. [2021-06-05 15:15:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:30,107 INFO L225 Difference]: With dead ends: 880 [2021-06-05 15:15:30,107 INFO L226 Difference]: Without dead ends: 824 [2021-06-05 15:15:30,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 512.6ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:15:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-05 15:15:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 425. [2021-06-05 15:15:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-06-05 15:15:30,118 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 31 [2021-06-05 15:15:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:30,118 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-06-05 15:15:30,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-06-05 15:15:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:30,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:30,119 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:30,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:30,343 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:30,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:30,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1866596212, now seen corresponding path program 21 times [2021-06-05 15:15:30,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:30,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014602505] [2021-06-05 15:15:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:30,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014602505] [2021-06-05 15:15:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014602505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:30,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273145200] [2021-06-05 15:15:30,571 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 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 15:15:30,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:30,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:30,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:30,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:30,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:30,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:30,944 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 72 treesize of output 32 [2021-06-05 15:15:30,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:30,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:30,953 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 15:15:30,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:30,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273145200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:30,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:30,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:30,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990883185] [2021-06-05 15:15:30,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:30,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:30,965 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:31,195 INFO L93 Difference]: Finished difference Result 809 states and 1648 transitions. [2021-06-05 15:15:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:31,198 INFO L225 Difference]: With dead ends: 809 [2021-06-05 15:15:31,198 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 15:15:31,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:15:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 15:15:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-06-05 15:15:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.011709601873536) internal successors, (859), 427 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 859 transitions. [2021-06-05 15:15:31,207 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 859 transitions. Word has length 31 [2021-06-05 15:15:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:31,207 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 859 transitions. [2021-06-05 15:15:31,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 859 transitions. [2021-06-05 15:15:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:31,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:31,209 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:31,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:15:31,433 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:31,433 INFO L82 PathProgramCache]: Analyzing trace with hash 865807024, now seen corresponding path program 22 times [2021-06-05 15:15:31,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:31,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489262369] [2021-06-05 15:15:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:15:31,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489262369] [2021-06-05 15:15:31,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489262369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61978794] [2021-06-05 15:15:31,633 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 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 15:15:31,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:31,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:31,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:31,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:31,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:31,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:31,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:31,991 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 72 treesize of output 32 [2021-06-05 15:15:31,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:32,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:32,003 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 15:15:32,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:32,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61978794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:32,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:32,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-06-05 15:15:32,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122553960] [2021-06-05 15:15:32,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:32,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:32,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:32,015 INFO L87 Difference]: Start difference. First operand 428 states and 859 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 15:15:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:32,251 INFO L93 Difference]: Finished difference Result 853 states and 1716 transitions. [2021-06-05 15:15:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:32,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 31 [2021-06-05 15:15:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:32,253 INFO L225 Difference]: With dead ends: 853 [2021-06-05 15:15:32,253 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 15:15:32,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 473.8ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 15:15:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 464. [2021-06-05 15:15:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.9978401727861772) internal successors, (925), 463 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 925 transitions. [2021-06-05 15:15:32,262 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 925 transitions. Word has length 31 [2021-06-05 15:15:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:32,262 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 925 transitions. [2021-06-05 15:15:32,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 15:15:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 925 transitions. [2021-06-05 15:15:32,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:32,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:32,264 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:32,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:32,477 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:32,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:32,477 INFO L82 PathProgramCache]: Analyzing trace with hash -282568856, now seen corresponding path program 23 times [2021-06-05 15:15:32,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:32,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206706371] [2021-06-05 15:15:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:15:32,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:32,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206706371] [2021-06-05 15:15:32,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206706371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:32,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858575099] [2021-06-05 15:15:32,690 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 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 15:15:32,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:32,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:33,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:33,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:33,020 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 72 treesize of output 32 [2021-06-05 15:15:33,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:33,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:33,035 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 15:15:33,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:33,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858575099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:33,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:33,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 15:15:33,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931771086] [2021-06-05 15:15:33,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:33,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:33,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:33,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:33,048 INFO L87 Difference]: Start difference. First operand 464 states and 925 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:33,327 INFO L93 Difference]: Finished difference Result 925 states and 1897 transitions. [2021-06-05 15:15:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:15:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:33,330 INFO L225 Difference]: With dead ends: 925 [2021-06-05 15:15:33,330 INFO L226 Difference]: Without dead ends: 872 [2021-06-05 15:15:33,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-05 15:15:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 461. [2021-06-05 15:15:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.9978260869565216) internal successors, (919), 460 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 919 transitions. [2021-06-05 15:15:33,339 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 919 transitions. Word has length 31 [2021-06-05 15:15:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:33,340 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 919 transitions. [2021-06-05 15:15:33,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 919 transitions. [2021-06-05 15:15:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:33,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:33,341 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:33,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:15:33,565 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1619372270, now seen corresponding path program 24 times [2021-06-05 15:15:33,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:33,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771759508] [2021-06-05 15:15:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:33,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:33,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771759508] [2021-06-05 15:15:33,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771759508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:33,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424287395] [2021-06-05 15:15:33,771 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 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 15:15:33,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:15:33,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:33,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:33,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:34,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:34,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:34,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:34,148 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 72 treesize of output 32 [2021-06-05 15:15:34,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:34,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:34,157 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 15:15:34,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:34,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424287395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:34,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:34,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 15:15:34,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465343397] [2021-06-05 15:15:34,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:34,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:34,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:34,167 INFO L87 Difference]: Start difference. First operand 461 states and 919 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 15:15:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:34,490 INFO L93 Difference]: Finished difference Result 962 states and 1970 transitions. [2021-06-05 15:15:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:34,491 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-06-05 15:15:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:34,493 INFO L225 Difference]: With dead ends: 962 [2021-06-05 15:15:34,494 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 15:15:34,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 15:15:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 458. [2021-06-05 15:15:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.9978118161925602) internal successors, (913), 457 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 913 transitions. [2021-06-05 15:15:34,503 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 913 transitions. Word has length 31 [2021-06-05 15:15:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:34,503 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 913 transitions. [2021-06-05 15:15:34,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 15:15:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 913 transitions. [2021-06-05 15:15:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:34,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:34,504 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:34,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:34,725 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1401997878, now seen corresponding path program 25 times [2021-06-05 15:15:34,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:34,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608914883] [2021-06-05 15:15:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:34,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:34,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608914883] [2021-06-05 15:15:34,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608914883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:34,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953774998] [2021-06-05 15:15:34,973 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 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 15:15:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:35,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:35,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:35,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:35,395 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 72 treesize of output 32 [2021-06-05 15:15:35,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:35,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:35,404 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 15:15:35,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:35,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953774998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:35,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:35,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:35,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022828861] [2021-06-05 15:15:35,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:35,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:35,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:35,414 INFO L87 Difference]: Start difference. First operand 458 states and 913 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:35,689 INFO L93 Difference]: Finished difference Result 936 states and 1914 transitions. [2021-06-05 15:15:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:15:35,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:35,691 INFO L225 Difference]: With dead ends: 936 [2021-06-05 15:15:35,691 INFO L226 Difference]: Without dead ends: 877 [2021-06-05 15:15:35,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:35,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-06-05 15:15:35,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 434. [2021-06-05 15:15:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0115473441108547) internal successors, (871), 433 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 871 transitions. [2021-06-05 15:15:35,700 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 871 transitions. Word has length 31 [2021-06-05 15:15:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:35,700 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 871 transitions. [2021-06-05 15:15:35,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 871 transitions. [2021-06-05 15:15:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:35,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:35,701 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:35,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:15:35,925 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:35,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1874857228, now seen corresponding path program 26 times [2021-06-05 15:15:35,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:35,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418925538] [2021-06-05 15:15:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:36,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:36,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418925538] [2021-06-05 15:15:36,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418925538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:36,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050485214] [2021-06-05 15:15:36,149 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 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 15:15:36,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:36,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:36,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:36,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:36,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:36,572 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 72 treesize of output 32 [2021-06-05 15:15:36,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:36,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:36,581 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 15:15:36,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050485214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:36,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:36,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902586314] [2021-06-05 15:15:36,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:36,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:36,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:36,592 INFO L87 Difference]: Start difference. First operand 434 states and 871 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:36,822 INFO L93 Difference]: Finished difference Result 947 states and 1941 transitions. [2021-06-05 15:15:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:36,825 INFO L225 Difference]: With dead ends: 947 [2021-06-05 15:15:36,825 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 15:15:36,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:36,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 15:15:36,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 431. [2021-06-05 15:15:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0186046511627906) internal successors, (868), 430 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 868 transitions. [2021-06-05 15:15:36,833 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 868 transitions. Word has length 31 [2021-06-05 15:15:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:36,833 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 868 transitions. [2021-06-05 15:15:36,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 868 transitions. [2021-06-05 15:15:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:36,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:36,834 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:37,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:37,053 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:37,053 INFO L82 PathProgramCache]: Analyzing trace with hash 615761780, now seen corresponding path program 27 times [2021-06-05 15:15:37,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:37,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507484026] [2021-06-05 15:15:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:37,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:37,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507484026] [2021-06-05 15:15:37,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507484026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:37,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373845590] [2021-06-05 15:15:37,274 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 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 15:15:37,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:37,315 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:37,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:37,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:37,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:37,807 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 70 treesize of output 32 [2021-06-05 15:15:37,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:37,826 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 15:15:37,827 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 15:15:37,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-06-05 15:15:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:37,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373845590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:37,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:37,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:37,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880529061] [2021-06-05 15:15:37,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:37,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:37,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:37,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:37,839 INFO L87 Difference]: Start difference. First operand 431 states and 868 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:38,171 INFO L93 Difference]: Finished difference Result 780 states and 1574 transitions. [2021-06-05 15:15:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:38,174 INFO L225 Difference]: With dead ends: 780 [2021-06-05 15:15:38,174 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 15:15:38,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:15:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 15:15:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 470. [2021-06-05 15:15:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-06-05 15:15:38,182 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-06-05 15:15:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:38,182 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-06-05 15:15:38,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-06-05 15:15:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:38,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:38,183 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:38,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:15:38,397 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash 833136172, now seen corresponding path program 28 times [2021-06-05 15:15:38,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:38,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116052902] [2021-06-05 15:15:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:38,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116052902] [2021-06-05 15:15:38,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116052902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078598479] [2021-06-05 15:15:38,615 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 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 15:15:38,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:38,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:38,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:39,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:39,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:39,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:39,033 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 72 treesize of output 32 [2021-06-05 15:15:39,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:39,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:39,045 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 15:15:39,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:39,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078598479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:39,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:39,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:39,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102746274] [2021-06-05 15:15:39,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:39,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:39,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:39,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:39,059 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:39,385 INFO L93 Difference]: Finished difference Result 833 states and 1680 transitions. [2021-06-05 15:15:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:39,387 INFO L225 Difference]: With dead ends: 833 [2021-06-05 15:15:39,387 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 15:15:39,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:15:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 15:15:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 470. [2021-06-05 15:15:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-06-05 15:15:39,397 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-06-05 15:15:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:39,397 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-06-05 15:15:39,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-06-05 15:15:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:39,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:39,399 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:39,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:39,613 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash -167653016, now seen corresponding path program 29 times [2021-06-05 15:15:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142151425] [2021-06-05 15:15:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:15:39,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:39,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142151425] [2021-06-05 15:15:39,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142151425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:39,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437748374] [2021-06-05 15:15:39,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:15:39,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:39,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:39,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:40,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:40,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:40,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:40,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:40,295 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 70 treesize of output 32 [2021-06-05 15:15:40,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:40,313 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 15:15:40,314 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 15:15:40,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-06-05 15:15:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:40,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437748374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:40,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:40,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 15:15:40,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96049360] [2021-06-05 15:15:40,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:40,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:40,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:40,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:40,325 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:40,674 INFO L93 Difference]: Finished difference Result 1001 states and 2003 transitions. [2021-06-05 15:15:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:15:40,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:15:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:40,676 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 15:15:40,676 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 15:15:40,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:15:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 15:15:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 512. [2021-06-05 15:15:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.9921722113502935) internal successors, (1018), 511 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1018 transitions. [2021-06-05 15:15:40,684 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1018 transitions. Word has length 31 [2021-06-05 15:15:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:40,684 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1018 transitions. [2021-06-05 15:15:40,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1018 transitions. [2021-06-05 15:15:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:40,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:40,685 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:40,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:15:40,893 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:40,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:40,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1642134986, now seen corresponding path program 30 times [2021-06-05 15:15:40,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:40,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666069779] [2021-06-05 15:15:40,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:41,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:41,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666069779] [2021-06-05 15:15:41,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666069779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:41,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601072697] [2021-06-05 15:15:41,081 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 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 15:15:41,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:15:41,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:41,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:41,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:41,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:41,410 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 72 treesize of output 32 [2021-06-05 15:15:41,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:41,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:41,419 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 15:15:41,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:41,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601072697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:41,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:41,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 15:15:41,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792250922] [2021-06-05 15:15:41,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:41,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:41,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:41,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:41,438 INFO L87 Difference]: Start difference. First operand 512 states and 1018 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 15:15:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:41,676 INFO L93 Difference]: Finished difference Result 1117 states and 2272 transitions. [2021-06-05 15:15:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:41,676 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-06-05 15:15:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:41,679 INFO L225 Difference]: With dead ends: 1117 [2021-06-05 15:15:41,679 INFO L226 Difference]: Without dead ends: 1061 [2021-06-05 15:15:41,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-05 15:15:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 539. [2021-06-05 15:15:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.986988847583643) internal successors, (1069), 538 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1069 transitions. [2021-06-05 15:15:41,688 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1069 transitions. Word has length 31 [2021-06-05 15:15:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:41,688 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1069 transitions. [2021-06-05 15:15:41,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 15:15:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1069 transitions. [2021-06-05 15:15:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:41,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:41,689 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:41,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:15:41,893 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1859509378, now seen corresponding path program 31 times [2021-06-05 15:15:41,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:41,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471161020] [2021-06-05 15:15:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:42,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:42,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471161020] [2021-06-05 15:15:42,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471161020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:42,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735687650] [2021-06-05 15:15:42,096 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 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 15:15:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:42,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:42,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:42,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:42,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:42,481 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 72 treesize of output 32 [2021-06-05 15:15:42,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:42,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:42,491 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 15:15:42,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:42,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735687650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:42,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:42,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:42,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998065642] [2021-06-05 15:15:42,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:42,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:42,503 INFO L87 Difference]: Start difference. First operand 539 states and 1069 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:42,813 INFO L93 Difference]: Finished difference Result 1088 states and 2213 transitions. [2021-06-05 15:15:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:15:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:42,815 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 15:15:42,815 INFO L226 Difference]: Without dead ends: 1029 [2021-06-05 15:15:42,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-05 15:15:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 536. [2021-06-05 15:15:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.9869158878504674) internal successors, (1063), 535 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1063 transitions. [2021-06-05 15:15:42,823 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1063 transitions. Word has length 31 [2021-06-05 15:15:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:42,823 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1063 transitions. [2021-06-05 15:15:42,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1063 transitions. [2021-06-05 15:15:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:42,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:42,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:43,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:15:43,025 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1386650028, now seen corresponding path program 32 times [2021-06-05 15:15:43,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:43,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910169901] [2021-06-05 15:15:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:43,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:43,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910169901] [2021-06-05 15:15:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910169901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468103643] [2021-06-05 15:15:43,251 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 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 15:15:43,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:43,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:43,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:43,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:43,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:43,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:43,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:43,633 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 72 treesize of output 32 [2021-06-05 15:15:43,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:43,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:43,642 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 15:15:43,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:43,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468103643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:43,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:43,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:43,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284539065] [2021-06-05 15:15:43,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:43,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:43,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:43,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:43,653 INFO L87 Difference]: Start difference. First operand 536 states and 1063 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:43,957 INFO L93 Difference]: Finished difference Result 1059 states and 2151 transitions. [2021-06-05 15:15:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:43,957 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:43,960 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 15:15:43,960 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 15:15:43,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:43,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 15:15:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 533. [2021-06-05 15:15:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.986842105263158) internal successors, (1057), 532 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1057 transitions. [2021-06-05 15:15:43,968 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1057 transitions. Word has length 31 [2021-06-05 15:15:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:43,968 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1057 transitions. [2021-06-05 15:15:43,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1057 transitions. [2021-06-05 15:15:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:43,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:43,969 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:44,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:15:44,183 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:44,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:44,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1919082992, now seen corresponding path program 33 times [2021-06-05 15:15:44,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:44,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682622027] [2021-06-05 15:15:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:15:44,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:44,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682622027] [2021-06-05 15:15:44,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682622027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:44,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589872498] [2021-06-05 15:15:44,363 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 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 15:15:44,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:15:44,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:44,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:44,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:44,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:44,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:44,733 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 72 treesize of output 32 [2021-06-05 15:15:44,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:44,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:44,742 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 15:15:44,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:44,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589872498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:44,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:44,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 15:15:44,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62469142] [2021-06-05 15:15:44,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:44,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:44,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:44,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:44,752 INFO L87 Difference]: Start difference. First operand 533 states and 1057 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:44,967 INFO L93 Difference]: Finished difference Result 1026 states and 2079 transitions. [2021-06-05 15:15:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:15:44,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:15:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:44,971 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 15:15:44,971 INFO L226 Difference]: Without dead ends: 938 [2021-06-05 15:15:44,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-05 15:15:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 575. [2021-06-05 15:15:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.9825783972125435) internal successors, (1138), 574 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1138 transitions. [2021-06-05 15:15:44,980 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1138 transitions. Word has length 31 [2021-06-05 15:15:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:44,980 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1138 transitions. [2021-06-05 15:15:44,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1138 transitions. [2021-06-05 15:15:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:44,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:44,982 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:45,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:15:45,189 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash -566096302, now seen corresponding path program 34 times [2021-06-05 15:15:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:45,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124566031] [2021-06-05 15:15:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:45,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:45,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124566031] [2021-06-05 15:15:45,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124566031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:45,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435444274] [2021-06-05 15:15:45,373 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 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 15:15:45,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:45,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:45,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:45,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:45,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:45,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:45,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:45,776 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 72 treesize of output 32 [2021-06-05 15:15:45,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:45,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:45,786 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 15:15:45,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:45,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435444274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:45,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:45,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-05 15:15:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410747721] [2021-06-05 15:15:45,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:45,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:45,798 INFO L87 Difference]: Start difference. First operand 575 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 15:15:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:46,027 INFO L93 Difference]: Finished difference Result 1110 states and 2251 transitions. [2021-06-05 15:15:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 31 [2021-06-05 15:15:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:46,030 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 15:15:46,030 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 15:15:46,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 15:15:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 563. [2021-06-05 15:15:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.9822064056939501) internal successors, (1114), 562 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1114 transitions. [2021-06-05 15:15:46,039 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1114 transitions. Word has length 31 [2021-06-05 15:15:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:46,039 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1114 transitions. [2021-06-05 15:15:46,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 15:15:46,039 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1114 transitions. [2021-06-05 15:15:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:46,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:46,040 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:46,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:15:46,240 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash -348721910, now seen corresponding path program 35 times [2021-06-05 15:15:46,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:46,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219652204] [2021-06-05 15:15:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:46,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:46,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219652204] [2021-06-05 15:15:46,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219652204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:46,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188446180] [2021-06-05 15:15:46,432 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 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 15:15:46,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:46,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:46,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:15:46,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:46,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:46,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:46,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-06-05 15:15:46,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:46,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:46,869 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 15:15:46,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:9 [2021-06-05 15:15:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:46,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188446180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:46,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:46,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 15:15:46,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338138749] [2021-06-05 15:15:46,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:15:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:15:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:15:46,889 INFO L87 Difference]: Start difference. First operand 563 states and 1114 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 15:15:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:47,912 INFO L93 Difference]: Finished difference Result 1236 states and 2487 transitions. [2021-06-05 15:15:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:15:47,912 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 31 [2021-06-05 15:15:47,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:47,914 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 15:15:47,915 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 15:15:47,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1004.0ms TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:15:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 15:15:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 578. [2021-06-05 15:15:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.977469670710572) internal successors, (1141), 577 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1141 transitions. [2021-06-05 15:15:47,924 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1141 transitions. Word has length 31 [2021-06-05 15:15:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:47,924 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1141 transitions. [2021-06-05 15:15:47,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 15:15:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1141 transitions. [2021-06-05 15:15:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:47,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:47,925 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:48,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 15:15:48,126 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash -821581260, now seen corresponding path program 36 times [2021-06-05 15:15:48,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:48,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295963576] [2021-06-05 15:15:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:48,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:48,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295963576] [2021-06-05 15:15:48,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295963576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:48,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627140097] [2021-06-05 15:15:48,342 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 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 15:15:48,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:15:48,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:48,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:15:48,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:48,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:48,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:48,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:48,704 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 72 treesize of output 32 [2021-06-05 15:15:48,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:48,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:48,712 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 15:15:48,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:48,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627140097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:48,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:48,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:48,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761930440] [2021-06-05 15:15:48,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:48,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:48,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:48,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:48,723 INFO L87 Difference]: Start difference. First operand 578 states and 1141 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:48,934 INFO L93 Difference]: Finished difference Result 1207 states and 2430 transitions. [2021-06-05 15:15:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:15:48,934 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:48,936 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 15:15:48,936 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 15:15:48,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:48,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 15:15:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 614. [2021-06-05 15:15:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.9804241435562806) internal successors, (1214), 613 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1214 transitions. [2021-06-05 15:15:48,946 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1214 transitions. Word has length 31 [2021-06-05 15:15:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:48,946 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1214 transitions. [2021-06-05 15:15:48,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1214 transitions. [2021-06-05 15:15:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:48,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:48,948 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:49,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:49,161 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1916779244, now seen corresponding path program 37 times [2021-06-05 15:15:49,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:49,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840869938] [2021-06-05 15:15:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:49,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:49,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840869938] [2021-06-05 15:15:49,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840869938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:49,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244688810] [2021-06-05 15:15:49,392 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 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 15:15:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:49,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:49,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:49,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:49,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:49,818 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 72 treesize of output 32 [2021-06-05 15:15:49,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:49,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:49,829 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 15:15:49,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:49,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244688810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:49,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:49,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 15:15:49,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780020332] [2021-06-05 15:15:49,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:49,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:49,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:49,841 INFO L87 Difference]: Start difference. First operand 614 states and 1214 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:50,191 INFO L93 Difference]: Finished difference Result 1033 states and 2073 transitions. [2021-06-05 15:15:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-05 15:15:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:50,193 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 15:15:50,193 INFO L226 Difference]: Without dead ends: 1010 [2021-06-05 15:15:50,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 474.3ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-05 15:15:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 624. [2021-06-05 15:15:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.9823434991974318) internal successors, (1235), 623 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1235 transitions. [2021-06-05 15:15:50,204 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1235 transitions. Word has length 31 [2021-06-05 15:15:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:50,204 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1235 transitions. [2021-06-05 15:15:50,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 15:15:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1235 transitions. [2021-06-05 15:15:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:50,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:50,205 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:50,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:50,417 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1512927684, now seen corresponding path program 38 times [2021-06-05 15:15:50,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:50,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398632836] [2021-06-05 15:15:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:50,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:50,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398632836] [2021-06-05 15:15:50,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398632836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:50,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263478895] [2021-06-05 15:15:50,653 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 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 15:15:50,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:50,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:50,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:50,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:50,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:50,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:50,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:50,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:50,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:50,961 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 72 treesize of output 32 [2021-06-05 15:15:50,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:50,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:50,974 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 15:15:50,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:50,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263478895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:50,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:50,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:15:50,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407687254] [2021-06-05 15:15:50,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:50,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:50,984 INFO L87 Difference]: Start difference. First operand 624 states and 1235 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:51,304 INFO L93 Difference]: Finished difference Result 1316 states and 2627 transitions. [2021-06-05 15:15:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:15:51,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-05 15:15:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:51,306 INFO L225 Difference]: With dead ends: 1316 [2021-06-05 15:15:51,306 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 15:15:51,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:15:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 15:15:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 717. [2021-06-05 15:15:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.9594972067039107) internal successors, (1403), 716 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 15:15:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1403 transitions. [2021-06-05 15:15:51,316 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1403 transitions. Word has length 31 [2021-06-05 15:15:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:51,316 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1403 transitions. [2021-06-05 15:15:51,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1403 transitions. [2021-06-05 15:15:51,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:51,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:51,318 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:51,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:51,541 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:51,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash 514234710, now seen corresponding path program 39 times [2021-06-05 15:15:51,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:51,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415927793] [2021-06-05 15:15:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:51,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:51,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415927793] [2021-06-05 15:15:51,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415927793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:51,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579928268] [2021-06-05 15:15:51,737 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 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 15:15:51,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:51,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:51,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:52,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:52,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:52,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:52,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:52,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:52,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:52,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:52,061 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 72 treesize of output 32 [2021-06-05 15:15:52,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:52,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:52,070 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 15:15:52,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:52,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579928268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:52,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:52,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:15:52,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041281312] [2021-06-05 15:15:52,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:52,089 INFO L87 Difference]: Start difference. First operand 717 states and 1403 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:52,328 INFO L93 Difference]: Finished difference Result 1252 states and 2517 transitions. [2021-06-05 15:15:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-05 15:15:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:52,330 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 15:15:52,330 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 15:15:52,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 15:15:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 762. [2021-06-05 15:15:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.9540078843626807) internal successors, (1487), 761 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1487 transitions. [2021-06-05 15:15:52,339 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1487 transitions. Word has length 31 [2021-06-05 15:15:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:52,339 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1487 transitions. [2021-06-05 15:15:52,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1487 transitions. [2021-06-05 15:15:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:52,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:52,340 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:52,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 15:15:52,550 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash -486554478, now seen corresponding path program 40 times [2021-06-05 15:15:52,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:52,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109266473] [2021-06-05 15:15:52,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:52,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109266473] [2021-06-05 15:15:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109266473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513099146] [2021-06-05 15:15:52,773 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 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 15:15:52,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:52,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:52,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:52,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:53,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:53,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:53,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:53,104 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 72 treesize of output 32 [2021-06-05 15:15:53,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:53,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:53,112 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 15:15:53,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:53,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513099146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:53,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:53,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 15:15:53,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722700485] [2021-06-05 15:15:53,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:53,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:53,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:53,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:53,121 INFO L87 Difference]: Start difference. First operand 762 states and 1487 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:53,500 INFO L93 Difference]: Finished difference Result 1353 states and 2677 transitions. [2021-06-05 15:15:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:15:53,500 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:15:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:53,502 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 15:15:53,502 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 15:15:53,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 504.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:15:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 15:15:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 678. [2021-06-05 15:15:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9748892171344166) internal successors, (1337), 677 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1337 transitions. [2021-06-05 15:15:53,510 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1337 transitions. Word has length 31 [2021-06-05 15:15:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:53,510 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 1337 transitions. [2021-06-05 15:15:53,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1337 transitions. [2021-06-05 15:15:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:53,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:53,511 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:53,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:53,734 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1540607916, now seen corresponding path program 41 times [2021-06-05 15:15:53,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:53,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584381806] [2021-06-05 15:15:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:53,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:53,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584381806] [2021-06-05 15:15:53,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584381806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:53,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936944512] [2021-06-05 15:15:53,941 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 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 15:15:53,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:53,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:53,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:54,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:54,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:54,328 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 72 treesize of output 32 [2021-06-05 15:15:54,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:54,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:54,338 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 15:15:54,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:54,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936944512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:54,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:54,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:15:54,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438889084] [2021-06-05 15:15:54,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:54,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:54,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:54,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:54,349 INFO L87 Difference]: Start difference. First operand 678 states and 1337 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:54,599 INFO L93 Difference]: Finished difference Result 1283 states and 2599 transitions. [2021-06-05 15:15:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:15:54,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-05 15:15:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:54,601 INFO L225 Difference]: With dead ends: 1283 [2021-06-05 15:15:54,601 INFO L226 Difference]: Without dead ends: 1224 [2021-06-05 15:15:54,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-05 15:15:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 681. [2021-06-05 15:15:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.975) internal successors, (1343), 680 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1343 transitions. [2021-06-05 15:15:54,612 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1343 transitions. Word has length 31 [2021-06-05 15:15:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:54,612 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1343 transitions. [2021-06-05 15:15:54,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1343 transitions. [2021-06-05 15:15:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:54,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:54,613 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:54,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:54,832 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:54,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1067748566, now seen corresponding path program 42 times [2021-06-05 15:15:54,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:54,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267495280] [2021-06-05 15:15:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:55,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:55,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267495280] [2021-06-05 15:15:55,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267495280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:55,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809896330] [2021-06-05 15:15:55,049 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 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 15:15:55,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:15:55,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:55,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:55,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:55,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:55,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:55,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:55,423 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 72 treesize of output 32 [2021-06-05 15:15:55,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:55,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:55,433 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 15:15:55,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:55,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809896330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:55,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:55,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:15:55,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746250529] [2021-06-05 15:15:55,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:55,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:55,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:55,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:55,444 INFO L87 Difference]: Start difference. First operand 681 states and 1343 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:55,712 INFO L93 Difference]: Finished difference Result 1174 states and 2374 transitions. [2021-06-05 15:15:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:55,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-05 15:15:55,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:55,714 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 15:15:55,714 INFO L226 Difference]: Without dead ends: 1132 [2021-06-05 15:15:55,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-06-05 15:15:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 684. [2021-06-05 15:15:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.9751098096632504) internal successors, (1349), 683 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1349 transitions. [2021-06-05 15:15:55,722 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1349 transitions. Word has length 31 [2021-06-05 15:15:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:55,722 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1349 transitions. [2021-06-05 15:15:55,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1349 transitions. [2021-06-05 15:15:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:55,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:55,724 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:55,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:15:55,931 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:55,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:55,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1600181530, now seen corresponding path program 43 times [2021-06-05 15:15:55,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:55,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527670831] [2021-06-05 15:15:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:56,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:56,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527670831] [2021-06-05 15:15:56,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527670831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:56,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401008459] [2021-06-05 15:15:56,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:56,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:56,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:56,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:56,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:56,503 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 72 treesize of output 32 [2021-06-05 15:15:56,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:56,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:56,512 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 15:15:56,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:56,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401008459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:56,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:56,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 15:15:56,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670243741] [2021-06-05 15:15:56,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:56,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:56,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:56,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:56,521 INFO L87 Difference]: Start difference. First operand 684 states and 1349 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:56,807 INFO L93 Difference]: Finished difference Result 1381 states and 2772 transitions. [2021-06-05 15:15:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:15:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:15:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:56,810 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 15:15:56,810 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 15:15:56,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 15:15:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 759. [2021-06-05 15:15:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.9736147757255937) internal successors, (1496), 758 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1496 transitions. [2021-06-05 15:15:56,823 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1496 transitions. Word has length 31 [2021-06-05 15:15:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:56,823 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 1496 transitions. [2021-06-05 15:15:56,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1496 transitions. [2021-06-05 15:15:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:56,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:56,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:57,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 15:15:57,048 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash -667623372, now seen corresponding path program 44 times [2021-06-05 15:15:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:57,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983540979] [2021-06-05 15:15:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:57,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983540979] [2021-06-05 15:15:57,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983540979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71212864] [2021-06-05 15:15:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:15:57,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:57,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:57,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:57,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:57,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:57,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:57,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:57,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:57,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:57,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:57,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:57,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:57,584 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 72 treesize of output 32 [2021-06-05 15:15:57,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:57,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:57,593 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 15:15:57,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:57,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71212864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:57,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:57,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:15:57,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867709749] [2021-06-05 15:15:57,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:57,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:57,602 INFO L87 Difference]: Start difference. First operand 759 states and 1496 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:57,922 INFO L93 Difference]: Finished difference Result 1359 states and 2747 transitions. [2021-06-05 15:15:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:57,922 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-05 15:15:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:57,924 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 15:15:57,924 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 15:15:57,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 15:15:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 774. [2021-06-05 15:15:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 15:15:57,937 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 15:15:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:57,937 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 15:15:57,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 15:15:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:57,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:57,939 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:58,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:15:58,162 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:58,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:58,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1140482722, now seen corresponding path program 45 times [2021-06-05 15:15:58,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:58,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706193401] [2021-06-05 15:15:58,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:58,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:58,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706193401] [2021-06-05 15:15:58,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706193401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:58,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467833456] [2021-06-05 15:15:58,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:58,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:15:58,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:58,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:58,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:58,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:58,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:58,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:58,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:58,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:58,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:58,783 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 72 treesize of output 32 [2021-06-05 15:15:58,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:58,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:58,794 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 15:15:58,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467833456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:58,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:58,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:15:58,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015878385] [2021-06-05 15:15:58,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:58,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:58,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:58,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:58,807 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:59,017 INFO L93 Difference]: Finished difference Result 1116 states and 2233 transitions. [2021-06-05 15:15:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:15:59,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-05 15:15:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:59,019 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 15:15:59,020 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 15:15:59,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:59,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 15:15:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 774. [2021-06-05 15:15:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 15:15:59,031 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 15:15:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:59,031 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 15:15:59,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:15:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 15:15:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:15:59,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:59,033 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:59,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:59,261 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:59,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1597877782, now seen corresponding path program 46 times [2021-06-05 15:15:59,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:59,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749840058] [2021-06-05 15:15:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:59,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:59,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749840058] [2021-06-05 15:15:59,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749840058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:59,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156087885] [2021-06-05 15:15:59,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:59,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:59,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:15:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:59,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:59,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:59,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:59,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:59,821 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 72 treesize of output 32 [2021-06-05 15:15:59,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:59,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:59,833 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 15:15:59,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:15:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:59,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156087885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:59,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:59,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:15:59,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508766229] [2021-06-05 15:15:59,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:59,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:59,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:59,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:59,842 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:16:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:00,195 INFO L93 Difference]: Finished difference Result 1127 states and 2256 transitions. [2021-06-05 15:16:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:16:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-05 15:16:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:00,197 INFO L225 Difference]: With dead ends: 1127 [2021-06-05 15:16:00,197 INFO L226 Difference]: Without dead ends: 1104 [2021-06-05 15:16:00,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:16:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-05 15:16:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 774. [2021-06-05 15:16:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:00,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-05 15:16:00,206 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-05 15:16:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:00,206 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-05 15:16:00,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 15:16:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-05 15:16:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:16:00,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:00,207 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:00,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:00,408 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:00,408 INFO L82 PathProgramCache]: Analyzing trace with hash 102354416, now seen corresponding path program 47 times [2021-06-05 15:16:00,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:00,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129496390] [2021-06-05 15:16:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:00,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:00,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129496390] [2021-06-05 15:16:00,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129496390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:00,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503827413] [2021-06-05 15:16:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:00,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:16:00,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:00,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:00,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:00,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:00,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:00,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:00,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:00,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:00,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:00,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:00,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:00,880 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 72 treesize of output 32 [2021-06-05 15:16:00,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:00,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:00,888 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 15:16:00,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:16:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:00,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503827413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:00,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:00,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 15:16:00,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939646564] [2021-06-05 15:16:00,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:16:00,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:00,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:16:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:00,898 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 15:16:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:01,069 INFO L93 Difference]: Finished difference Result 1217 states and 2444 transitions. [2021-06-05 15:16:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:16:01,069 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 15:16:01,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:01,071 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 15:16:01,071 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 15:16:01,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 15:16:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 801. [2021-06-05 15:16:01,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.98125) internal successors, (1585), 800 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1585 transitions. [2021-06-05 15:16:01,082 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1585 transitions. Word has length 31 [2021-06-05 15:16:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:01,083 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 1585 transitions. [2021-06-05 15:16:01,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 15:16:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1585 transitions. [2021-06-05 15:16:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:16:01,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:01,084 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:01,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 15:16:01,298 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:01,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1046021464, now seen corresponding path program 48 times [2021-06-05 15:16:01,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:01,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560087991] [2021-06-05 15:16:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:01,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:01,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560087991] [2021-06-05 15:16:01,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560087991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:01,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811760624] [2021-06-05 15:16:01,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:01,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:16:01,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:01,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:01,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:01,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:01,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:01,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:01,873 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 72 treesize of output 32 [2021-06-05 15:16:01,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:01,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:01,881 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 15:16:01,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:16:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:01,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811760624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:01,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:01,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 15:16:01,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290359850] [2021-06-05 15:16:01,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:16:01,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:01,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:16:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:01,891 INFO L87 Difference]: Start difference. First operand 801 states and 1585 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 15:16:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:02,149 INFO L93 Difference]: Finished difference Result 1401 states and 2833 transitions. [2021-06-05 15:16:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:16:02,150 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 15:16:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:02,151 INFO L225 Difference]: With dead ends: 1401 [2021-06-05 15:16:02,152 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 15:16:02,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 15:16:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 795. [2021-06-05 15:16:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.978589420654912) internal successors, (1571), 794 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1571 transitions. [2021-06-05 15:16:02,164 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1571 transitions. Word has length 31 [2021-06-05 15:16:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:02,164 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1571 transitions. [2021-06-05 15:16:02,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 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 15:16:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1571 transitions. [2021-06-05 15:16:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:16:02,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:02,166 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:02,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:02,381 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:02,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2129516810, now seen corresponding path program 49 times [2021-06-05 15:16:02,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:02,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202871639] [2021-06-05 15:16:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:02,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:02,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202871639] [2021-06-05 15:16:02,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202871639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:02,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118025852] [2021-06-05 15:16:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:02,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:02,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:02,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:02,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:02,887 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 72 treesize of output 32 [2021-06-05 15:16:02,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:02,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:02,911 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 15:16:02,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:16:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:02,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118025852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:02,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:02,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 15:16:02,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171752296] [2021-06-05 15:16:02,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:02,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:02,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:02,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:02,923 INFO L87 Difference]: Start difference. First operand 795 states and 1571 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:03,258 INFO L93 Difference]: Finished difference Result 1359 states and 2744 transitions. [2021-06-05 15:16:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:16:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:03,260 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 15:16:03,260 INFO L226 Difference]: Without dead ends: 1304 [2021-06-05 15:16:03,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-05 15:16:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 783. [2021-06-05 15:16:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-06-05 15:16:03,268 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-06-05 15:16:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:03,268 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-06-05 15:16:03,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-06-05 15:16:03,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:16:03,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:03,269 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:03,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 15:16:03,469 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:03,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1656657460, now seen corresponding path program 50 times [2021-06-05 15:16:03,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:03,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033087246] [2021-06-05 15:16:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:03,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:03,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033087246] [2021-06-05 15:16:03,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033087246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:03,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41662261] [2021-06-05 15:16:03,716 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 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 15:16:03,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:03,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:03,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:04,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:04,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:04,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:04,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:04,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:04,017 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 72 treesize of output 32 [2021-06-05 15:16:04,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:04,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:04,025 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 15:16:04,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:16:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:04,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41662261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:04,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:04,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 15:16:04,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550808460] [2021-06-05 15:16:04,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:04,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:04,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:04,035 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:04,335 INFO L93 Difference]: Finished difference Result 1153 states and 2311 transitions. [2021-06-05 15:16:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:16:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:04,337 INFO L225 Difference]: With dead ends: 1153 [2021-06-05 15:16:04,337 INFO L226 Difference]: Without dead ends: 1131 [2021-06-05 15:16:04,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-05 15:16:04,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 783. [2021-06-05 15:16:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-06-05 15:16:04,348 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-06-05 15:16:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:04,348 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-06-05 15:16:04,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-06-05 15:16:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:16:04,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:04,350 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:04,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:16:04,567 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 100050668, now seen corresponding path program 51 times [2021-06-05 15:16:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:04,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608060706] [2021-06-05 15:16:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:04,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:04,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608060706] [2021-06-05 15:16:04,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608060706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:04,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909830053] [2021-06-05 15:16:04,801 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 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 15:16:04,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:16:04,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:04,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:05,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:05,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:05,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:05,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:05,197 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 72 treesize of output 32 [2021-06-05 15:16:05,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:05,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:05,206 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 15:16:05,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:16:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:05,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909830053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:05,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:05,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 15:16:05,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952898396] [2021-06-05 15:16:05,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:05,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:05,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:05,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:05,216 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:05,438 INFO L93 Difference]: Finished difference Result 1136 states and 2278 transitions. [2021-06-05 15:16:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:16:05,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:05,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:05,439 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 15:16:05,439 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 15:16:05,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 15:16:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 777. [2021-06-05 15:16:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.9755154639175259) internal successors, (1533), 776 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1533 transitions. [2021-06-05 15:16:05,447 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1533 transitions. Word has length 31 [2021-06-05 15:16:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:05,447 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 1533 transitions. [2021-06-05 15:16:05,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 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 15:16:05,448 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1533 transitions. [2021-06-05 15:16:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:16:05,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:05,449 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:05,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:16:05,665 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:05,665 INFO L82 PathProgramCache]: Analyzing trace with hash 948748694, now seen corresponding path program 52 times [2021-06-05 15:16:05,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:05,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279413262] [2021-06-05 15:16:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:05,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:05,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279413262] [2021-06-05 15:16:05,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279413262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:05,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397554721] [2021-06-05 15:16:05,883 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 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 15:16:05,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:05,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:05,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:05,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:06,127 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 15:16:06,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 32 [2021-06-05 15:16:06,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:06,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:06,133 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 15:16:06,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:12 [2021-06-05 15:16:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:06,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397554721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:06,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:06,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 15:16:06,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463343719] [2021-06-05 15:16:06,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:16:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:06,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:16:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:06,143 INFO L87 Difference]: Start difference. First operand 777 states and 1533 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:06,423 INFO L93 Difference]: Finished difference Result 1012 states and 2014 transitions. [2021-06-05 15:16:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:16:06,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:16:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:06,424 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 15:16:06,424 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 15:16:06,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:06,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 15:16:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2021-06-05 15:16:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.9770114942528736) internal successors, (1548), 783 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1548 transitions. [2021-06-05 15:16:06,431 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1548 transitions. Word has length 31 [2021-06-05 15:16:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:06,431 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1548 transitions. [2021-06-05 15:16:06,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1548 transitions. [2021-06-05 15:16:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:16:06,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:06,432 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:06,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 15:16:06,633 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1698443767, now seen corresponding path program 53 times [2021-06-05 15:16:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:06,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820456319] [2021-06-05 15:16:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:06,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:06,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:06,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820456319] [2021-06-05 15:16:06,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820456319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:06,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646716247] [2021-06-05 15:16:06,666 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 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 15:16:06,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:16:06,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:16:06,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646716247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:06,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:06,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 15:16:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046103627] [2021-06-05 15:16:06,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:16:06,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:06,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:16:06,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:16:06,760 INFO L87 Difference]: Start difference. First operand 784 states and 1548 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 15:16:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:06,783 INFO L93 Difference]: Finished difference Result 1073 states and 2126 transitions. [2021-06-05 15:16:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:16:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 33 [2021-06-05 15:16:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:06,785 INFO L225 Difference]: With dead ends: 1073 [2021-06-05 15:16:06,785 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 15:16:06,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:16:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 15:16:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 845. [2021-06-05 15:16:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.9940758293838863) internal successors, (1683), 844 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1683 transitions. [2021-06-05 15:16:06,792 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1683 transitions. Word has length 33 [2021-06-05 15:16:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:06,792 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1683 transitions. [2021-06-05 15:16:06,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 15:16:06,793 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1683 transitions. [2021-06-05 15:16:06,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:16:06,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:06,794 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:06,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:06,994 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash 602846472, now seen corresponding path program 54 times [2021-06-05 15:16:06,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:06,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86538713] [2021-06-05 15:16:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:16:07,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:07,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86538713] [2021-06-05 15:16:07,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86538713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:07,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744354959] [2021-06-05 15:16:07,223 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 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 15:16:07,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:16:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:07,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:07,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:07,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:07,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:07,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:07,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:07,543 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 72 treesize of output 32 [2021-06-05 15:16:07,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:07,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:07,551 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 15:16:07,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:16:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:07,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744354959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:07,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:07,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 15:16:07,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113527107] [2021-06-05 15:16:07,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:07,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:07,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:07,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:07,561 INFO L87 Difference]: Start difference. First operand 845 states and 1683 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 15:16:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:07,891 INFO L93 Difference]: Finished difference Result 1429 states and 2876 transitions. [2021-06-05 15:16:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:16:07,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 34 [2021-06-05 15:16:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:07,893 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 15:16:07,893 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 15:16:07,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:16:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 15:16:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 869. [2021-06-05 15:16:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.9907834101382489) internal successors, (1728), 868 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1728 transitions. [2021-06-05 15:16:07,902 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1728 transitions. Word has length 34 [2021-06-05 15:16:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:07,902 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 1728 transitions. [2021-06-05 15:16:07,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 15:16:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1728 transitions. [2021-06-05 15:16:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:16:07,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:07,903 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:08,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:16:08,104 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:08,104 INFO L82 PathProgramCache]: Analyzing trace with hash 867153280, now seen corresponding path program 55 times [2021-06-05 15:16:08,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:08,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444421886] [2021-06-05 15:16:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:08,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:08,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444421886] [2021-06-05 15:16:08,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444421886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:08,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349069186] [2021-06-05 15:16:08,332 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 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 15:16:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:08,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:08,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:08,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:08,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:08,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:08,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:08,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:08,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:08,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:08,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:08,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:08,646 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 72 treesize of output 32 [2021-06-05 15:16:08,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:08,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:08,654 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 15:16:08,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:16:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:08,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349069186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:08,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:08,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 15:16:08,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89471959] [2021-06-05 15:16:08,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:16:08,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:16:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:16:08,664 INFO L87 Difference]: Start difference. First operand 869 states and 1728 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:09,044 INFO L93 Difference]: Finished difference Result 1640 states and 3316 transitions. [2021-06-05 15:16:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:16:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:16:09,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:09,046 INFO L225 Difference]: With dead ends: 1640 [2021-06-05 15:16:09,046 INFO L226 Difference]: Without dead ends: 1595 [2021-06-05 15:16:09,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:09,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-06-05 15:16:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 926. [2021-06-05 15:16:09,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9848648648648648) internal successors, (1836), 925 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1836 transitions. [2021-06-05 15:16:09,055 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1836 transitions. Word has length 34 [2021-06-05 15:16:09,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:09,055 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1836 transitions. [2021-06-05 15:16:09,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:09,055 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1836 transitions. [2021-06-05 15:16:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:16:09,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:09,056 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:09,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:09,261 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:09,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1679153002, now seen corresponding path program 56 times [2021-06-05 15:16:09,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:09,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66214418] [2021-06-05 15:16:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:09,479 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:09,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:09,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66214418] [2021-06-05 15:16:09,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66214418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:09,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984088543] [2021-06-05 15:16:09,480 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 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 15:16:09,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:09,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:09,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:16:09,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:09,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:09,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:09,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:09,841 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 72 treesize of output 32 [2021-06-05 15:16:09,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:09,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:09,850 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 15:16:09,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-05 15:16:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:09,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984088543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:09,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:09,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-05 15:16:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745767257] [2021-06-05 15:16:09,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:09,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:09,859 INFO L87 Difference]: Start difference. First operand 926 states and 1836 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:10,290 INFO L93 Difference]: Finished difference Result 1557 states and 3145 transitions. [2021-06-05 15:16:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:16:10,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:16:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:10,292 INFO L225 Difference]: With dead ends: 1557 [2021-06-05 15:16:10,292 INFO L226 Difference]: Without dead ends: 1512 [2021-06-05 15:16:10,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:16:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-06-05 15:16:10,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 896. [2021-06-05 15:16:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.987709497206704) internal successors, (1779), 895 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1779 transitions. [2021-06-05 15:16:10,304 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1779 transitions. Word has length 34 [2021-06-05 15:16:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:10,304 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1779 transitions. [2021-06-05 15:16:10,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1779 transitions. [2021-06-05 15:16:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:10,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:10,305 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:10,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 15:16:10,513 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:10,513 INFO L82 PathProgramCache]: Analyzing trace with hash 431279499, now seen corresponding path program 57 times [2021-06-05 15:16:10,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:10,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67065958] [2021-06-05 15:16:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:10,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:10,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67065958] [2021-06-05 15:16:10,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67065958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:10,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528058420] [2021-06-05 15:16:10,794 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 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 15:16:10,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:16:10,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:10,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:10,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:11,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:11,385 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 89 treesize of output 37 [2021-06-05 15:16:11,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:11,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:11,396 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 15:16:11,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:11,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528058420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:11,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:11,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 15:16:11,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099846448] [2021-06-05 15:16:11,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:11,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:11,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:11,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:11,436 INFO L87 Difference]: Start difference. First operand 896 states and 1779 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:11,807 INFO L93 Difference]: Finished difference Result 1846 states and 3731 transitions. [2021-06-05 15:16:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:16:11,807 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:11,809 INFO L225 Difference]: With dead ends: 1846 [2021-06-05 15:16:11,809 INFO L226 Difference]: Without dead ends: 1801 [2021-06-05 15:16:11,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 796.3ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:16:11,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-06-05 15:16:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 926. [2021-06-05 15:16:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9891891891891893) internal successors, (1840), 925 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1840 transitions. [2021-06-05 15:16:11,818 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1840 transitions. Word has length 36 [2021-06-05 15:16:11,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:11,818 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1840 transitions. [2021-06-05 15:16:11,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1840 transitions. [2021-06-05 15:16:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:11,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:11,819 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:12,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:12,032 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 971114529, now seen corresponding path program 58 times [2021-06-05 15:16:12,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:12,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466142779] [2021-06-05 15:16:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:12,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:12,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466142779] [2021-06-05 15:16:12,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466142779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:12,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517067709] [2021-06-05 15:16:12,346 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 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 15:16:12,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:12,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:12,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:12,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:12,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:12,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:12,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:12,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:12,867 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 89 treesize of output 37 [2021-06-05 15:16:12,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:12,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:12,876 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 15:16:12,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:12,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517067709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:12,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:12,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 15:16:12,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987421556] [2021-06-05 15:16:12,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:12,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:12,907 INFO L87 Difference]: Start difference. First operand 926 states and 1840 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:13,296 INFO L93 Difference]: Finished difference Result 2095 states and 4241 transitions. [2021-06-05 15:16:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:16:13,297 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:13,298 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 15:16:13,299 INFO L226 Difference]: Without dead ends: 2049 [2021-06-05 15:16:13,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:16:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-05 15:16:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1030. [2021-06-05 15:16:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.0136054421768708) internal successors, (2072), 1029 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2072 transitions. [2021-06-05 15:16:13,310 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2072 transitions. Word has length 36 [2021-06-05 15:16:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:13,310 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2072 transitions. [2021-06-05 15:16:13,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2072 transitions. [2021-06-05 15:16:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:13,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:13,312 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:13,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 15:16:13,512 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1302699637, now seen corresponding path program 59 times [2021-06-05 15:16:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:13,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478512049] [2021-06-05 15:16:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:13,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:13,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478512049] [2021-06-05 15:16:13,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478512049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:13,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860697529] [2021-06-05 15:16:13,815 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 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 15:16:13,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:16:13,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:13,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:16:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:14,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:14,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:14,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:14,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:14,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:14,422 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 89 treesize of output 37 [2021-06-05 15:16:14,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:14,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:14,432 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 15:16:14,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:14,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860697529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:14,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:14,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 15:16:14,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018514386] [2021-06-05 15:16:14,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:14,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:14,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:14,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:14,476 INFO L87 Difference]: Start difference. First operand 1030 states and 2072 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:14,902 INFO L93 Difference]: Finished difference Result 1598 states and 3240 transitions. [2021-06-05 15:16:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:16:14,902 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:14,903 INFO L225 Difference]: With dead ends: 1598 [2021-06-05 15:16:14,903 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 15:16:14,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:16:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 15:16:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1036. [2021-06-05 15:16:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.0144927536231885) internal successors, (2085), 1035 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2085 transitions. [2021-06-05 15:16:14,913 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2085 transitions. Word has length 36 [2021-06-05 15:16:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:14,913 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2085 transitions. [2021-06-05 15:16:14,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:14,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2085 transitions. [2021-06-05 15:16:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:14,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:14,915 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:15,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:15,137 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1027051523, now seen corresponding path program 60 times [2021-06-05 15:16:15,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:15,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738233579] [2021-06-05 15:16:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:15,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:15,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738233579] [2021-06-05 15:16:15,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738233579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:15,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110878715] [2021-06-05 15:16:15,407 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 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 15:16:15,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:16:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:15,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:15,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:15,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:15,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:15,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:15,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:15,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:15,896 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 89 treesize of output 37 [2021-06-05 15:16:15,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:15,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:15,908 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 15:16:15,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:15,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110878715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:15,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:15,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 15:16:15,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109065639] [2021-06-05 15:16:15,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:16:15,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:16:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:15,939 INFO L87 Difference]: Start difference. First operand 1036 states and 2085 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:16,339 INFO L93 Difference]: Finished difference Result 2409 states and 4930 transitions. [2021-06-05 15:16:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:16:16,340 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:16,343 INFO L225 Difference]: With dead ends: 2409 [2021-06-05 15:16:16,343 INFO L226 Difference]: Without dead ends: 2332 [2021-06-05 15:16:16,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 692.4ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:16:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-05 15:16:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1084. [2021-06-05 15:16:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.0083102493074794) internal successors, (2175), 1083 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2175 transitions. [2021-06-05 15:16:16,358 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2175 transitions. Word has length 36 [2021-06-05 15:16:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:16,358 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 2175 transitions. [2021-06-05 15:16:16,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2175 transitions. [2021-06-05 15:16:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:16,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:16,359 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:16,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:16:16,560 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:16,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1566886553, now seen corresponding path program 61 times [2021-06-05 15:16:16,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:16,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894047817] [2021-06-05 15:16:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:16,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894047817] [2021-06-05 15:16:16,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894047817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551100381] [2021-06-05 15:16:16,893 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 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 15:16:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:16,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:16,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:17,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:17,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:17,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:17,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:17,538 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 89 treesize of output 37 [2021-06-05 15:16:17,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:17,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:17,547 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 15:16:17,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:17,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551100381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:17,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:17,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 15:16:17,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598190478] [2021-06-05 15:16:17,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:16:17,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:16:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:17,579 INFO L87 Difference]: Start difference. First operand 1084 states and 2175 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:18,230 INFO L93 Difference]: Finished difference Result 2544 states and 5180 transitions. [2021-06-05 15:16:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:16:18,230 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:18,232 INFO L225 Difference]: With dead ends: 2544 [2021-06-05 15:16:18,232 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 15:16:18,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 925.1ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:16:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 15:16:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1207. [2021-06-05 15:16:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-06-05 15:16:18,249 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-06-05 15:16:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:18,249 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-06-05 15:16:18,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-06-05 15:16:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:18,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:18,251 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:18,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:18,466 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash -706927613, now seen corresponding path program 62 times [2021-06-05 15:16:18,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:18,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269191687] [2021-06-05 15:16:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:18,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:18,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269191687] [2021-06-05 15:16:18,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269191687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:18,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883944922] [2021-06-05 15:16:18,737 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 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 15:16:18,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:18,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:18,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:19,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:19,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:19,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:19,279 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 89 treesize of output 37 [2021-06-05 15:16:19,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:19,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:19,288 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 15:16:19,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:19,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883944922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:19,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:19,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 15:16:19,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738012062] [2021-06-05 15:16:19,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:16:19,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:16:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:19,320 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:19,973 INFO L93 Difference]: Finished difference Result 2101 states and 4239 transitions. [2021-06-05 15:16:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:16:19,973 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:19,975 INFO L225 Difference]: With dead ends: 2101 [2021-06-05 15:16:19,975 INFO L226 Difference]: Without dead ends: 2073 [2021-06-05 15:16:19,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 725.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:16:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-06-05 15:16:19,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1207. [2021-06-05 15:16:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-06-05 15:16:19,988 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-06-05 15:16:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:19,988 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-06-05 15:16:19,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-06-05 15:16:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:19,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:19,989 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:20,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 15:16:20,190 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash 623181831, now seen corresponding path program 63 times [2021-06-05 15:16:20,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:20,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164054574] [2021-06-05 15:16:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:16:20,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:20,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164054574] [2021-06-05 15:16:20,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164054574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:20,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088454910] [2021-06-05 15:16:20,462 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 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 15:16:20,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:16:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:20,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:20,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:20,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:20,945 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 89 treesize of output 37 [2021-06-05 15:16:20,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:20,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:20,954 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 15:16:20,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:20,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088454910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:20,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:20,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-06-05 15:16:20,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108997090] [2021-06-05 15:16:20,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:16:20,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:20,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:16:20,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:20,984 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:16:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:21,387 INFO L93 Difference]: Finished difference Result 2018 states and 4044 transitions. [2021-06-05 15:16:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:16:21,387 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 36 [2021-06-05 15:16:21,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:21,389 INFO L225 Difference]: With dead ends: 2018 [2021-06-05 15:16:21,389 INFO L226 Difference]: Without dead ends: 1879 [2021-06-05 15:16:21,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 747.9ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:16:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-06-05 15:16:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1350. [2021-06-05 15:16:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.9940696812453669) internal successors, (2690), 1349 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2690 transitions. [2021-06-05 15:16:21,406 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2690 transitions. Word has length 36 [2021-06-05 15:16:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:21,406 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 2690 transitions. [2021-06-05 15:16:21,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:16:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2690 transitions. [2021-06-05 15:16:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:21,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:21,408 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:21,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 15:16:21,625 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:21,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:21,625 INFO L82 PathProgramCache]: Analyzing trace with hash 603825257, now seen corresponding path program 64 times [2021-06-05 15:16:21,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:21,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138704763] [2021-06-05 15:16:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:21,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:21,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138704763] [2021-06-05 15:16:21,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138704763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:21,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731903308] [2021-06-05 15:16:21,946 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 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 15:16:21,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:21,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:21,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:22,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:22,462 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 89 treesize of output 37 [2021-06-05 15:16:22,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:22,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:22,470 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 15:16:22,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:22,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731903308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:22,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:22,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 15:16:22,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227935377] [2021-06-05 15:16:22,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:22,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:22,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:22,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:22,501 INFO L87 Difference]: Start difference. First operand 1350 states and 2690 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:22,926 INFO L93 Difference]: Finished difference Result 2339 states and 4747 transitions. [2021-06-05 15:16:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:16:22,926 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:22,928 INFO L225 Difference]: With dead ends: 2339 [2021-06-05 15:16:22,928 INFO L226 Difference]: Without dead ends: 2297 [2021-06-05 15:16:22,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 791.9ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:16:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-05 15:16:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1365. [2021-06-05 15:16:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-06-05 15:16:22,943 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-06-05 15:16:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:22,943 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-06-05 15:16:22,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-06-05 15:16:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:22,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:22,944 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:23,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 15:16:23,145 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1455840993, now seen corresponding path program 65 times [2021-06-05 15:16:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:23,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858429907] [2021-06-05 15:16:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:23,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858429907] [2021-06-05 15:16:23,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858429907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851525995] [2021-06-05 15:16:23,443 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 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 15:16:23,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:16:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:23,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:23,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:24,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:24,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:24,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:24,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:24,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:24,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-05 15:16:24,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:24,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:24,078 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 15:16:24,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 15:16:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:24,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851525995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:24,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:24,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 15:16:24,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855151703] [2021-06-05 15:16:24,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:16:24,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:24,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:16:24,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:16:24,121 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:24,802 INFO L93 Difference]: Finished difference Result 2510 states and 5065 transitions. [2021-06-05 15:16:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:16:24,802 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:24,805 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 15:16:24,805 INFO L226 Difference]: Without dead ends: 2465 [2021-06-05 15:16:24,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 906.8ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:16:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-05 15:16:24,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1365. [2021-06-05 15:16:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-06-05 15:16:24,825 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-06-05 15:16:24,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:24,825 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-06-05 15:16:24,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-06-05 15:16:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:24,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:24,827 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:25,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:25,050 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash -817973173, now seen corresponding path program 66 times [2021-06-05 15:16:25,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:25,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525084015] [2021-06-05 15:16:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:25,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:25,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525084015] [2021-06-05 15:16:25,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525084015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:25,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749896658] [2021-06-05 15:16:25,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:25,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:16:25,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:25,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:25,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:26,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:26,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:26,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:26,234 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 83 treesize of output 37 [2021-06-05 15:16:26,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:26,258 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-05 15:16:26,260 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 15:16:26,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-06-05 15:16:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:26,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749896658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:26,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:26,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 15:16:26,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979325812] [2021-06-05 15:16:26,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:16:26,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:26,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:16:26,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:26,307 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:29,263 INFO L93 Difference]: Finished difference Result 2490 states and 5033 transitions. [2021-06-05 15:16:29,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:16:29,264 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:29,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:29,266 INFO L225 Difference]: With dead ends: 2490 [2021-06-05 15:16:29,266 INFO L226 Difference]: Without dead ends: 2398 [2021-06-05 15:16:29,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1960.6ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:16:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-06-05 15:16:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1439. [2021-06-05 15:16:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.0180806675938805) internal successors, (2902), 1438 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2902 transitions. [2021-06-05 15:16:29,281 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2902 transitions. Word has length 36 [2021-06-05 15:16:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:29,281 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 2902 transitions. [2021-06-05 15:16:29,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2902 transitions. [2021-06-05 15:16:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:29,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:29,282 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:29,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:29,483 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1925362883, now seen corresponding path program 67 times [2021-06-05 15:16:29,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:29,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651144589] [2021-06-05 15:16:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:29,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:29,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651144589] [2021-06-05 15:16:29,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651144589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:29,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360601137] [2021-06-05 15:16:29,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:29,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:30,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:30,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:30,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:30,306 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 89 treesize of output 37 [2021-06-05 15:16:30,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:30,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:30,314 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 15:16:30,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:30,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360601137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:30,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:30,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 15:16:30,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463269292] [2021-06-05 15:16:30,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:16:30,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:30,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:16:30,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:30,347 INFO L87 Difference]: Start difference. First operand 1439 states and 2902 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:30,797 INFO L93 Difference]: Finished difference Result 2160 states and 4385 transitions. [2021-06-05 15:16:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:16:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:30,799 INFO L225 Difference]: With dead ends: 2160 [2021-06-05 15:16:30,799 INFO L226 Difference]: Without dead ends: 2137 [2021-06-05 15:16:30,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:16:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-06-05 15:16:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1445. [2021-06-05 15:16:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.018698060941828) internal successors, (2915), 1444 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2915 transitions. [2021-06-05 15:16:30,812 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2915 transitions. Word has length 36 [2021-06-05 15:16:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:30,812 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 2915 transitions. [2021-06-05 15:16:30,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2915 transitions. [2021-06-05 15:16:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:30,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:30,814 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:31,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:31,015 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:31,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:31,016 INFO L82 PathProgramCache]: Analyzing trace with hash -325263507, now seen corresponding path program 68 times [2021-06-05 15:16:31,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:31,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401011121] [2021-06-05 15:16:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:16:31,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:31,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401011121] [2021-06-05 15:16:31,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401011121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:31,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567863626] [2021-06-05 15:16:31,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:16:31,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:31,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:31,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:31,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:31,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:31,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:31,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:31,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:31,708 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 89 treesize of output 37 [2021-06-05 15:16:31,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:31,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:31,716 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 15:16:31,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:31,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567863626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:31,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:31,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 15:16:31,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736313873] [2021-06-05 15:16:31,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:16:31,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:16:31,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:31,725 INFO L87 Difference]: Start difference. First operand 1445 states and 2915 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:16:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:32,226 INFO L93 Difference]: Finished difference Result 2272 states and 4614 transitions. [2021-06-05 15:16:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:16:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 36 [2021-06-05 15:16:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:32,228 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 15:16:32,228 INFO L226 Difference]: Without dead ends: 2213 [2021-06-05 15:16:32,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-06-05 15:16:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1517. [2021-06-05 15:16:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.0118733509234827) internal successors, (3050), 1516 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 3050 transitions. [2021-06-05 15:16:32,241 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 3050 transitions. Word has length 36 [2021-06-05 15:16:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:32,241 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 3050 transitions. [2021-06-05 15:16:32,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:16:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 3050 transitions. [2021-06-05 15:16:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:32,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:32,243 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:32,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 15:16:32,443 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash 214571523, now seen corresponding path program 69 times [2021-06-05 15:16:32,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:32,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296899311] [2021-06-05 15:16:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:32,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:32,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296899311] [2021-06-05 15:16:32,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296899311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:32,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227010673] [2021-06-05 15:16:32,662 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 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 15:16:32,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:16:32,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:32,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:33,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:33,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:33,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:33,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:33,147 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 89 treesize of output 37 [2021-06-05 15:16:33,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:33,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:33,155 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 15:16:33,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:33,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227010673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:33,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:33,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:16:33,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502242972] [2021-06-05 15:16:33,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:16:33,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:33,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:16:33,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:16:33,165 INFO L87 Difference]: Start difference. First operand 1517 states and 3050 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:33,669 INFO L93 Difference]: Finished difference Result 2702 states and 5500 transitions. [2021-06-05 15:16:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:16:33,669 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:33,671 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 15:16:33,671 INFO L226 Difference]: Without dead ends: 2605 [2021-06-05 15:16:33,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:16:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-05 15:16:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1571. [2021-06-05 15:16:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-06-05 15:16:33,687 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-06-05 15:16:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:33,687 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-06-05 15:16:33,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-06-05 15:16:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:33,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:33,689 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:33,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:33,889 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:33,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2059242643, now seen corresponding path program 70 times [2021-06-05 15:16:33,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:33,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237701792] [2021-06-05 15:16:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:34,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237701792] [2021-06-05 15:16:34,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237701792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956509991] [2021-06-05 15:16:34,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:34,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:34,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:34,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:34,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:34,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:34,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:34,698 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 89 treesize of output 37 [2021-06-05 15:16:34,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:34,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:34,707 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 15:16:34,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:34,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956509991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:34,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:34,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:16:34,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345611291] [2021-06-05 15:16:34,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:16:34,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:34,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:16:34,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:16:34,716 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:35,073 INFO L93 Difference]: Finished difference Result 2210 states and 4470 transitions. [2021-06-05 15:16:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:16:35,073 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:35,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:35,075 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 15:16:35,075 INFO L226 Difference]: Without dead ends: 2188 [2021-06-05 15:16:35,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:16:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-05 15:16:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1571. [2021-06-05 15:16:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-06-05 15:16:35,090 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-06-05 15:16:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:35,091 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-06-05 15:16:35,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-06-05 15:16:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:35,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:35,092 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:35,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:35,297 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:35,297 INFO L82 PathProgramCache]: Analyzing trace with hash -729133199, now seen corresponding path program 71 times [2021-06-05 15:16:35,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:35,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137316471] [2021-06-05 15:16:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:35,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:35,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137316471] [2021-06-05 15:16:35,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137316471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:35,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711533790] [2021-06-05 15:16:35,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:16:35,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:16:35,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:35,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:16:35,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:36,021 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 89 treesize of output 37 [2021-06-05 15:16:36,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:36,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:36,029 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 15:16:36,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:36,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711533790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:36,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:36,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 15:16:36,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253732570] [2021-06-05 15:16:36,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:16:36,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:36,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:16:36,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:36,039 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:16:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:36,589 INFO L93 Difference]: Finished difference Result 2485 states and 5026 transitions. [2021-06-05 15:16:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:16:36,589 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 36 [2021-06-05 15:16:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:36,591 INFO L225 Difference]: With dead ends: 2485 [2021-06-05 15:16:36,591 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 15:16:36,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 661.0ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 15:16:36,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1582. [2021-06-05 15:16:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.001897533206831) internal successors, (3165), 1581 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3165 transitions. [2021-06-05 15:16:36,606 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3165 transitions. Word has length 36 [2021-06-05 15:16:36,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:36,606 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3165 transitions. [2021-06-05 15:16:36,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:16:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3165 transitions. [2021-06-05 15:16:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:36,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:36,607 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:36,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:36,808 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash 103525963, now seen corresponding path program 72 times [2021-06-05 15:16:36,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:36,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628459262] [2021-06-05 15:16:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:37,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:37,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628459262] [2021-06-05 15:16:37,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628459262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:37,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804127594] [2021-06-05 15:16:37,084 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 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 15:16:37,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:16:37,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:37,113 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:37,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:37,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:37,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:37,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:37,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:37,606 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 89 treesize of output 37 [2021-06-05 15:16:37,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:37,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:37,617 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 15:16:37,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:37,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804127594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:37,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:37,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:16:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820290897] [2021-06-05 15:16:37,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:37,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:37,629 INFO L87 Difference]: Start difference. First operand 1582 states and 3165 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:37,950 INFO L93 Difference]: Finished difference Result 2739 states and 5530 transitions. [2021-06-05 15:16:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:16:37,951 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:37,953 INFO L225 Difference]: With dead ends: 2739 [2021-06-05 15:16:37,953 INFO L226 Difference]: Without dead ends: 2676 [2021-06-05 15:16:37,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-05 15:16:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1621. [2021-06-05 15:16:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.0) internal successors, (3240), 1620 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3240 transitions. [2021-06-05 15:16:37,969 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3240 transitions. Word has length 36 [2021-06-05 15:16:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:37,969 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3240 transitions. [2021-06-05 15:16:37,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3240 transitions. [2021-06-05 15:16:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:37,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:37,970 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:38,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 15:16:38,171 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2124679093, now seen corresponding path program 73 times [2021-06-05 15:16:38,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:38,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226929234] [2021-06-05 15:16:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:38,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:38,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226929234] [2021-06-05 15:16:38,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226929234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:38,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414391169] [2021-06-05 15:16:38,434 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 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 15:16:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:38,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:38,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:38,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:38,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:38,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:38,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:38,946 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 89 treesize of output 37 [2021-06-05 15:16:38,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:38,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:38,954 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 15:16:38,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:38,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414391169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:38,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:38,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:16:38,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484114126] [2021-06-05 15:16:38,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:38,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:38,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:38,964 INFO L87 Difference]: Start difference. First operand 1621 states and 3240 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:39,605 INFO L93 Difference]: Finished difference Result 2343 states and 4717 transitions. [2021-06-05 15:16:39,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:16:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:39,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:39,607 INFO L225 Difference]: With dead ends: 2343 [2021-06-05 15:16:39,608 INFO L226 Difference]: Without dead ends: 2321 [2021-06-05 15:16:39,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 619.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-06-05 15:16:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1627. [2021-06-05 15:16:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-06-05 15:16:39,623 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-06-05 15:16:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:39,623 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-06-05 15:16:39,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-06-05 15:16:39,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:39,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:39,625 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:39,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:39,826 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash 573047853, now seen corresponding path program 74 times [2021-06-05 15:16:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:39,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125507052] [2021-06-05 15:16:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:40,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:40,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125507052] [2021-06-05 15:16:40,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125507052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:40,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480539429] [2021-06-05 15:16:40,064 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 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 15:16:40,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:40,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:40,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:16:40,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:40,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:40,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:40,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:40,628 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 91 treesize of output 37 [2021-06-05 15:16:40,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:40,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:40,637 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 15:16:40,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 15:16:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:40,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480539429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:40,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:40,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:16:40,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713971331] [2021-06-05 15:16:40,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:40,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:40,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:40,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:40,646 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:41,056 INFO L93 Difference]: Finished difference Result 2287 states and 4610 transitions. [2021-06-05 15:16:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:16:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:41,058 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 15:16:41,058 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 15:16:41,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 643.3ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 15:16:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1627. [2021-06-05 15:16:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-06-05 15:16:41,075 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-06-05 15:16:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:41,075 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-06-05 15:16:41,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-06-05 15:16:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:41,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:41,076 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:41,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 15:16:41,277 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1638712185, now seen corresponding path program 75 times [2021-06-05 15:16:41,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:41,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287063621] [2021-06-05 15:16:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:41,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:41,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287063621] [2021-06-05 15:16:41,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287063621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:41,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029350282] [2021-06-05 15:16:41,539 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 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 15:16:41,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:16:41,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:41,575 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:42,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:42,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,035 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 89 treesize of output 37 [2021-06-05 15:16:42,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:42,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:42,043 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 15:16:42,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:42,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029350282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:42,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:42,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 15:16:42,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561071371] [2021-06-05 15:16:42,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:16:42,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:42,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:16:42,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:42,052 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:16:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:42,414 INFO L93 Difference]: Finished difference Result 2567 states and 5154 transitions. [2021-06-05 15:16:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:16:42,414 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 36 [2021-06-05 15:16:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:42,417 INFO L225 Difference]: With dead ends: 2567 [2021-06-05 15:16:42,417 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 15:16:42,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 691.9ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 15:16:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1699. [2021-06-05 15:16:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.9976442873969376) internal successors, (3392), 1698 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3392 transitions. [2021-06-05 15:16:42,435 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3392 transitions. Word has length 36 [2021-06-05 15:16:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:42,435 INFO L482 AbstractCegarLoop]: Abstraction has 1699 states and 3392 transitions. [2021-06-05 15:16:42,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:16:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3392 transitions. [2021-06-05 15:16:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:42,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:42,436 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:42,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:42,637 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1182283007, now seen corresponding path program 76 times [2021-06-05 15:16:42,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:42,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737101146] [2021-06-05 15:16:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:42,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737101146] [2021-06-05 15:16:42,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737101146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:42,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248191530] [2021-06-05 15:16:42,887 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 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 15:16:42,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:42,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:42,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:42,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:43,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:43,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:43,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:43,374 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 89 treesize of output 37 [2021-06-05 15:16:43,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:43,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:43,384 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 15:16:43,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:43,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248191530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:43,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:43,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:16:43,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691544762] [2021-06-05 15:16:43,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:16:43,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:43,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:16:43,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:16:43,394 INFO L87 Difference]: Start difference. First operand 1699 states and 3392 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:43,782 INFO L93 Difference]: Finished difference Result 3110 states and 6274 transitions. [2021-06-05 15:16:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:16:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:43,785 INFO L225 Difference]: With dead ends: 3110 [2021-06-05 15:16:43,785 INFO L226 Difference]: Without dead ends: 3051 [2021-06-05 15:16:43,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 599.2ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:16:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-05 15:16:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1690. [2021-06-05 15:16:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.9964476021314388) internal successors, (3372), 1689 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3372 transitions. [2021-06-05 15:16:43,803 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3372 transitions. Word has length 36 [2021-06-05 15:16:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:43,804 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 3372 transitions. [2021-06-05 15:16:43,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3372 transitions. [2021-06-05 15:16:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:43,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:43,805 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:44,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:44,006 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:44,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:44,006 INFO L82 PathProgramCache]: Analyzing trace with hash -806053023, now seen corresponding path program 77 times [2021-06-05 15:16:44,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:44,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895385189] [2021-06-05 15:16:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:44,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:44,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895385189] [2021-06-05 15:16:44,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895385189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:44,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901844713] [2021-06-05 15:16:44,259 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 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 15:16:44,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:16:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:44,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:44,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:44,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:44,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:44,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:44,773 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 89 treesize of output 37 [2021-06-05 15:16:44,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:44,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:44,781 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 15:16:44,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:44,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901844713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:44,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:44,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:16:44,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714573077] [2021-06-05 15:16:44,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:44,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:44,791 INFO L87 Difference]: Start difference. First operand 1690 states and 3372 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:45,088 INFO L93 Difference]: Finished difference Result 2909 states and 5872 transitions. [2021-06-05 15:16:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:16:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:45,091 INFO L225 Difference]: With dead ends: 2909 [2021-06-05 15:16:45,091 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 15:16:45,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 609.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 15:16:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1717. [2021-06-05 15:16:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 1.9965034965034965) internal successors, (3426), 1716 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3426 transitions. [2021-06-05 15:16:45,108 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3426 transitions. Word has length 36 [2021-06-05 15:16:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:45,108 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3426 transitions. [2021-06-05 15:16:45,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3426 transitions. [2021-06-05 15:16:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:45,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:45,110 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:45,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:45,310 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:45,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:45,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100107, now seen corresponding path program 78 times [2021-06-05 15:16:45,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:45,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124974920] [2021-06-05 15:16:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:45,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124974920] [2021-06-05 15:16:45,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124974920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299268092] [2021-06-05 15:16:45,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:45,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:16:45,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:45,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:46,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:46,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:46,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:46,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:46,121 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 89 treesize of output 37 [2021-06-05 15:16:46,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:46,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:46,131 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 15:16:46,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:46,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299268092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:46,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:46,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:16:46,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806905718] [2021-06-05 15:16:46,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:46,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:46,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:46,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:46,142 INFO L87 Difference]: Start difference. First operand 1717 states and 3426 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:46,526 INFO L93 Difference]: Finished difference Result 2369 states and 4761 transitions. [2021-06-05 15:16:46,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:16:46,527 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:46,529 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 15:16:46,529 INFO L226 Difference]: Without dead ends: 2347 [2021-06-05 15:16:46,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:46,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-06-05 15:16:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1726. [2021-06-05 15:16:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:46,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-06-05 15:16:46,543 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-06-05 15:16:46,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:46,544 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-06-05 15:16:46,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-06-05 15:16:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:46,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:46,545 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:46,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:46,746 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:46,746 INFO L82 PathProgramCache]: Analyzing trace with hash -336531133, now seen corresponding path program 79 times [2021-06-05 15:16:46,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:46,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317875761] [2021-06-05 15:16:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:46,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:46,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317875761] [2021-06-05 15:16:46,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317875761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:46,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519371427] [2021-06-05 15:16:46,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:47,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:47,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:47,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:47,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:47,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:47,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:47,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:47,551 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 89 treesize of output 37 [2021-06-05 15:16:47,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:47,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:47,562 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 15:16:47,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:47,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519371427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:47,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:47,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:16:47,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128463072] [2021-06-05 15:16:47,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:47,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:47,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:47,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:47,573 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:47,925 INFO L93 Difference]: Finished difference Result 2328 states and 4682 transitions. [2021-06-05 15:16:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:16:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:47,927 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 15:16:47,927 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 15:16:47,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 632.2ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 15:16:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1726. [2021-06-05 15:16:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-06-05 15:16:47,952 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-06-05 15:16:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:47,953 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-06-05 15:16:47,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-06-05 15:16:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:47,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:47,956 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:48,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:48,176 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 666409005, now seen corresponding path program 80 times [2021-06-05 15:16:48,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:48,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929271496] [2021-06-05 15:16:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:48,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:48,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929271496] [2021-06-05 15:16:48,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929271496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:48,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595568107] [2021-06-05 15:16:48,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:48,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:48,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:48,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:16:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:48,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:48,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:48,933 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 91 treesize of output 37 [2021-06-05 15:16:48,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:48,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:48,941 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 15:16:48,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 15:16:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:48,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595568107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:48,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:48,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:16:48,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936149587] [2021-06-05 15:16:48,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:48,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:48,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:48,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:48,951 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:49,526 INFO L93 Difference]: Finished difference Result 2252 states and 4526 transitions. [2021-06-05 15:16:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:16:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:49,529 INFO L225 Difference]: With dead ends: 2252 [2021-06-05 15:16:49,529 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 15:16:49,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 595.3ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 15:16:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1729. [2021-06-05 15:16:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.9965277777777777) internal successors, (3450), 1728 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3450 transitions. [2021-06-05 15:16:49,546 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3450 transitions. Word has length 36 [2021-06-05 15:16:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:49,546 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3450 transitions. [2021-06-05 15:16:49,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3450 transitions. [2021-06-05 15:16:49,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:49,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:49,549 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:49,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:49,751 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:49,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:49,752 INFO L82 PathProgramCache]: Analyzing trace with hash -30986797, now seen corresponding path program 81 times [2021-06-05 15:16:49,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:49,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714282030] [2021-06-05 15:16:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:16:50,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:50,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714282030] [2021-06-05 15:16:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714282030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:50,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946055688] [2021-06-05 15:16:50,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:50,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:16:50,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:50,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:50,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:50,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:50,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:50,523 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 89 treesize of output 37 [2021-06-05 15:16:50,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:50,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:50,531 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 15:16:50,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:50,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946055688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:50,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:50,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-05 15:16:50,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46185764] [2021-06-05 15:16:50,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:50,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:50,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:50,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:50,563 INFO L87 Difference]: Start difference. First operand 1729 states and 3450 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:51,044 INFO L93 Difference]: Finished difference Result 3640 states and 7355 transitions. [2021-06-05 15:16:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:16:51,044 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:51,047 INFO L225 Difference]: With dead ends: 3640 [2021-06-05 15:16:51,047 INFO L226 Difference]: Without dead ends: 3597 [2021-06-05 15:16:51,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:16:51,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-06-05 15:16:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 1800. [2021-06-05 15:16:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 1.991106170094497) internal successors, (3582), 1799 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3582 transitions. [2021-06-05 15:16:51,066 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3582 transitions. Word has length 36 [2021-06-05 15:16:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:51,067 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 3582 transitions. [2021-06-05 15:16:51,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3582 transitions. [2021-06-05 15:16:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:51,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:51,069 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:51,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:51,269 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:51,269 INFO L82 PathProgramCache]: Analyzing trace with hash 564785227, now seen corresponding path program 82 times [2021-06-05 15:16:51,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:51,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285334584] [2021-06-05 15:16:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:51,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:51,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285334584] [2021-06-05 15:16:51,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285334584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:51,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805291434] [2021-06-05 15:16:51,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:51,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:51,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:51,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:51,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:52,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:52,035 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 89 treesize of output 37 [2021-06-05 15:16:52,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:52,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:52,043 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 15:16:52,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:52,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805291434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:52,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:52,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 15:16:52,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947115068] [2021-06-05 15:16:52,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:16:52,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:16:52,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:52,076 INFO L87 Difference]: Start difference. First operand 1800 states and 3582 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:52,811 INFO L93 Difference]: Finished difference Result 3718 states and 7520 transitions. [2021-06-05 15:16:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:16:52,812 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:52,815 INFO L225 Difference]: With dead ends: 3718 [2021-06-05 15:16:52,815 INFO L226 Difference]: Without dead ends: 3670 [2021-06-05 15:16:52,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 757.1ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:16:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-06-05 15:16:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 1884. [2021-06-05 15:16:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 1.9867233138608604) internal successors, (3741), 1883 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 3741 transitions. [2021-06-05 15:16:52,845 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 3741 transitions. Word has length 36 [2021-06-05 15:16:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:52,845 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 3741 transitions. [2021-06-05 15:16:52,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 3741 transitions. [2021-06-05 15:16:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:52,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:52,848 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:53,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 15:16:53,061 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash 453739667, now seen corresponding path program 83 times [2021-06-05 15:16:53,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:53,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992549254] [2021-06-05 15:16:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:53,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:53,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992549254] [2021-06-05 15:16:53,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992549254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:53,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472395955] [2021-06-05 15:16:53,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:53,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:16:53,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:53,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:16:53,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:53,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:53,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:53,891 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 89 treesize of output 37 [2021-06-05 15:16:53,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:53,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:53,899 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 15:16:53,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:53,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472395955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:53,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:53,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 15:16:53,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256089286] [2021-06-05 15:16:53,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:16:53,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:16:53,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:53,932 INFO L87 Difference]: Start difference. First operand 1884 states and 3741 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:54,817 INFO L93 Difference]: Finished difference Result 3721 states and 7510 transitions. [2021-06-05 15:16:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:16:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:54,820 INFO L225 Difference]: With dead ends: 3721 [2021-06-05 15:16:54,821 INFO L226 Difference]: Without dead ends: 3678 [2021-06-05 15:16:54,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 836.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:16:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-06-05 15:16:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 1956. [2021-06-05 15:16:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.984143222506394) internal successors, (3879), 1955 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3879 transitions. [2021-06-05 15:16:54,841 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3879 transitions. Word has length 36 [2021-06-05 15:16:54,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:54,841 INFO L482 AbstractCegarLoop]: Abstraction has 1956 states and 3879 transitions. [2021-06-05 15:16:54,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3879 transitions. [2021-06-05 15:16:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:54,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:54,844 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:55,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:55,049 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:55,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1097891573, now seen corresponding path program 84 times [2021-06-05 15:16:55,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:55,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095557863] [2021-06-05 15:16:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:55,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:55,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095557863] [2021-06-05 15:16:55,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095557863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:55,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734387596] [2021-06-05 15:16:55,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:55,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:16:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:55,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:55,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:55,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:55,857 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 89 treesize of output 37 [2021-06-05 15:16:55,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:55,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:55,865 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 15:16:55,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:55,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734387596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:55,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:55,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 15:16:55,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879223883] [2021-06-05 15:16:55,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 15:16:55,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:55,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 15:16:55,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:55,899 INFO L87 Difference]: Start difference. First operand 1956 states and 3879 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:56,697 INFO L93 Difference]: Finished difference Result 3689 states and 7457 transitions. [2021-06-05 15:16:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:16:56,697 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:56,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:56,700 INFO L225 Difference]: With dead ends: 3689 [2021-06-05 15:16:56,700 INFO L226 Difference]: Without dead ends: 3644 [2021-06-05 15:16:56,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:16:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-05 15:16:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 1973. [2021-06-05 15:16:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.9852941176470589) internal successors, (3915), 1972 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 3915 transitions. [2021-06-05 15:16:56,720 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 3915 transitions. Word has length 36 [2021-06-05 15:16:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:56,720 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 3915 transitions. [2021-06-05 15:16:56,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 3915 transitions. [2021-06-05 15:16:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:56,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:56,722 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:56,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 15:16:56,925 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash -787529803, now seen corresponding path program 85 times [2021-06-05 15:16:56,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:56,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326035482] [2021-06-05 15:16:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:57,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:57,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326035482] [2021-06-05 15:16:57,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326035482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:57,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082217609] [2021-06-05 15:16:57,147 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 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 15:16:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:57,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:57,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:57,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:57,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:57,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:57,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:57,647 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 89 treesize of output 37 [2021-06-05 15:16:57,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:57,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:57,655 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 15:16:57,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:57,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082217609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:57,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:57,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:16:57,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565817401] [2021-06-05 15:16:57,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:16:57,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:57,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:16:57,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:16:57,665 INFO L87 Difference]: Start difference. First operand 1973 states and 3915 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:58,051 INFO L93 Difference]: Finished difference Result 3068 states and 6162 transitions. [2021-06-05 15:16:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:16:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:58,055 INFO L225 Difference]: With dead ends: 3068 [2021-06-05 15:16:58,055 INFO L226 Difference]: Without dead ends: 3006 [2021-06-05 15:16:58,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-06-05 15:16:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1967. [2021-06-05 15:16:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 1.9852492370295016) internal successors, (3903), 1966 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:58,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3903 transitions. [2021-06-05 15:16:58,082 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3903 transitions. Word has length 36 [2021-06-05 15:16:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:58,082 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 3903 transitions. [2021-06-05 15:16:58,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3903 transitions. [2021-06-05 15:16:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:58,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:58,084 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:58,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:58,301 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash -898575363, now seen corresponding path program 86 times [2021-06-05 15:16:58,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:58,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564309257] [2021-06-05 15:16:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:58,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564309257] [2021-06-05 15:16:58,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564309257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926349084] [2021-06-05 15:16:58,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:16:58,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:58,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:16:58,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:59,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:59,067 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 89 treesize of output 37 [2021-06-05 15:16:59,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:59,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:59,075 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 15:16:59,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:16:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:59,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926349084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:59,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:59,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:16:59,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95115172] [2021-06-05 15:16:59,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:16:59,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:16:59,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:59,085 INFO L87 Difference]: Start difference. First operand 1967 states and 3903 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:59,685 INFO L93 Difference]: Finished difference Result 3053 states and 6129 transitions. [2021-06-05 15:16:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:16:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:16:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:59,688 INFO L225 Difference]: With dead ends: 3053 [2021-06-05 15:16:59,688 INFO L226 Difference]: Without dead ends: 2991 [2021-06-05 15:16:59,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 618.3ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-05 15:16:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1964. [2021-06-05 15:16:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.9852266938359653) internal successors, (3897), 1963 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3897 transitions. [2021-06-05 15:16:59,706 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3897 transitions. Word has length 36 [2021-06-05 15:16:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:59,706 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 3897 transitions. [2021-06-05 15:16:59,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3897 transitions. [2021-06-05 15:16:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:16:59,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:59,707 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:59,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:59,908 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1844760693, now seen corresponding path program 87 times [2021-06-05 15:16:59,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:59,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936709840] [2021-06-05 15:16:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:00,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:00,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936709840] [2021-06-05 15:17:00,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936709840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:00,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566708644] [2021-06-05 15:17:00,159 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 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 15:17:00,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:17:00,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:00,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:00,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:00,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:00,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:00,672 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 89 treesize of output 37 [2021-06-05 15:17:00,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:00,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:00,680 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 15:17:00,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:00,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566708644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:00,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:00,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:00,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97396299] [2021-06-05 15:17:00,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:00,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:00,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:00,692 INFO L87 Difference]: Start difference. First operand 1964 states and 3897 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:00,981 INFO L93 Difference]: Finished difference Result 3170 states and 6381 transitions. [2021-06-05 15:17:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:17:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:00,984 INFO L225 Difference]: With dead ends: 3170 [2021-06-05 15:17:00,984 INFO L226 Difference]: Without dead ends: 3105 [2021-06-05 15:17:00,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-06-05 15:17:01,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1988. [2021-06-05 15:17:01,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 1.9838953195772522) internal successors, (3942), 1987 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3942 transitions. [2021-06-05 15:17:01,011 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3942 transitions. Word has length 36 [2021-06-05 15:17:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:01,011 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 3942 transitions. [2021-06-05 15:17:01,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3942 transitions. [2021-06-05 15:17:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:01,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:01,013 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:01,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:01,213 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1808154349, now seen corresponding path program 88 times [2021-06-05 15:17:01,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:01,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908847538] [2021-06-05 15:17:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:01,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:01,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908847538] [2021-06-05 15:17:01,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908847538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:01,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169534892] [2021-06-05 15:17:01,472 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 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 15:17:01,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:01,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:01,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:01,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:01,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:01,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:01,986 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 89 treesize of output 37 [2021-06-05 15:17:01,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:01,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:01,996 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 15:17:01,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169534892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:02,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:02,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137602039] [2021-06-05 15:17:02,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:02,005 INFO L87 Difference]: Start difference. First operand 1988 states and 3942 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:02,761 INFO L93 Difference]: Finished difference Result 3044 states and 6092 transitions. [2021-06-05 15:17:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:17:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:02,763 INFO L225 Difference]: With dead ends: 3044 [2021-06-05 15:17:02,763 INFO L226 Difference]: Without dead ends: 3002 [2021-06-05 15:17:02,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-06-05 15:17:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 1982. [2021-06-05 15:17:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-06-05 15:17:02,781 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-06-05 15:17:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:02,781 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-06-05 15:17:02,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-06-05 15:17:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:02,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:02,783 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:02,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:02,983 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:02,983 INFO L82 PathProgramCache]: Analyzing trace with hash 935181707, now seen corresponding path program 89 times [2021-06-05 15:17:02,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:02,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036799334] [2021-06-05 15:17:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:03,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:03,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036799334] [2021-06-05 15:17:03,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036799334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:03,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469712775] [2021-06-05 15:17:03,225 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 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 15:17:03,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:17:03,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:03,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:03,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:03,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:03,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:03,768 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 89 treesize of output 37 [2021-06-05 15:17:03,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:03,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:03,776 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 15:17:03,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:03,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469712775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:03,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:03,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:03,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778627499] [2021-06-05 15:17:03,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:03,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:03,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:03,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:03,788 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:04,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:04,375 INFO L93 Difference]: Finished difference Result 2927 states and 5852 transitions. [2021-06-05 15:17:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:17:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:04,378 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 15:17:04,378 INFO L226 Difference]: Without dead ends: 2904 [2021-06-05 15:17:04,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 627.9ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-06-05 15:17:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1985. [2021-06-05 15:17:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.9838709677419355) internal successors, (3936), 1984 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3936 transitions. [2021-06-05 15:17:04,407 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3936 transitions. Word has length 36 [2021-06-05 15:17:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:04,407 INFO L482 AbstractCegarLoop]: Abstraction has 1985 states and 3936 transitions. [2021-06-05 15:17:04,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3936 transitions. [2021-06-05 15:17:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:04,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:04,408 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:04,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 15:17:04,609 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1938121845, now seen corresponding path program 90 times [2021-06-05 15:17:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:04,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893486814] [2021-06-05 15:17:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:04,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:04,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893486814] [2021-06-05 15:17:04,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893486814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:04,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038341735] [2021-06-05 15:17:04,870 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 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 15:17:04,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:17:04,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:04,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:05,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:05,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:05,428 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 89 treesize of output 37 [2021-06-05 15:17:05,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:05,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:05,438 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 15:17:05,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038341735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:05,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:05,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571232628] [2021-06-05 15:17:05,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:05,448 INFO L87 Difference]: Start difference. First operand 1985 states and 3936 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:05,926 INFO L93 Difference]: Finished difference Result 2935 states and 5869 transitions. [2021-06-05 15:17:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:17:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:05,929 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 15:17:05,929 INFO L226 Difference]: Without dead ends: 2911 [2021-06-05 15:17:05,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 671.6ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:05,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-05 15:17:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1982. [2021-06-05 15:17:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-06-05 15:17:05,946 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-06-05 15:17:05,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:05,947 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-06-05 15:17:05,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:05,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-06-05 15:17:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:05,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:05,948 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:06,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:06,149 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1884098707, now seen corresponding path program 91 times [2021-06-05 15:17:06,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:06,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661771703] [2021-06-05 15:17:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:17:06,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:06,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661771703] [2021-06-05 15:17:06,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661771703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:06,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046190509] [2021-06-05 15:17:06,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:17:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:06,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:06,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:06,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:06,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:06,859 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 89 treesize of output 37 [2021-06-05 15:17:06,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:06,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:06,867 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 15:17:06,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:06,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046190509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:06,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:06,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 15:17:06,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851051834] [2021-06-05 15:17:06,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:17:06,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:06,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:17:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:17:06,877 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:17:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:07,301 INFO L93 Difference]: Finished difference Result 3201 states and 6417 transitions. [2021-06-05 15:17:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:17:07,302 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 36 [2021-06-05 15:17:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:07,304 INFO L225 Difference]: With dead ends: 3201 [2021-06-05 15:17:07,305 INFO L226 Difference]: Without dead ends: 3012 [2021-06-05 15:17:07,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-06-05 15:17:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2015. [2021-06-05 15:17:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.9821251241310824) internal successors, (3992), 2014 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 3992 transitions. [2021-06-05 15:17:07,326 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 3992 transitions. Word has length 36 [2021-06-05 15:17:07,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:07,326 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 3992 transitions. [2021-06-05 15:17:07,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:17:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 3992 transitions. [2021-06-05 15:17:07,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:07,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:07,327 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:07,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 15:17:07,536 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1940533323, now seen corresponding path program 92 times [2021-06-05 15:17:07,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:07,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183204027] [2021-06-05 15:17:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:07,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:07,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183204027] [2021-06-05 15:17:07,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183204027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:07,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876765120] [2021-06-05 15:17:07,742 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 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 15:17:07,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:17:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:07,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:08,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:08,228 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 89 treesize of output 37 [2021-06-05 15:17:08,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:08,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:08,236 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 15:17:08,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:08,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876765120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:08,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:08,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 15:17:08,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851767250] [2021-06-05 15:17:08,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:17:08,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:08,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:17:08,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:17:08,246 INFO L87 Difference]: Start difference. First operand 2015 states and 3992 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:08,848 INFO L93 Difference]: Finished difference Result 3283 states and 6567 transitions. [2021-06-05 15:17:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:17:08,849 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:08,852 INFO L225 Difference]: With dead ends: 3283 [2021-06-05 15:17:08,852 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 15:17:08,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:17:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 15:17:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2009. [2021-06-05 15:17:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 1.9810756972111554) internal successors, (3978), 2008 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3978 transitions. [2021-06-05 15:17:08,871 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3978 transitions. Word has length 36 [2021-06-05 15:17:08,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:08,871 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 3978 transitions. [2021-06-05 15:17:08,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3978 transitions. [2021-06-05 15:17:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:08,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:08,872 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:09,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:09,073 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:09,073 INFO L82 PathProgramCache]: Analyzing trace with hash 518734893, now seen corresponding path program 93 times [2021-06-05 15:17:09,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:09,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485452128] [2021-06-05 15:17:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:09,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:09,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485452128] [2021-06-05 15:17:09,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485452128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:09,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702113310] [2021-06-05 15:17:09,306 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 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 15:17:09,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:17:09,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:09,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:09,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:09,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:09,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:09,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:09,806 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 89 treesize of output 37 [2021-06-05 15:17:09,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:09,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:09,818 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 15:17:09,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:09,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702113310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:09,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:09,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:17:09,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930872780] [2021-06-05 15:17:09,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:09,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:09,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:09,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:09,829 INFO L87 Difference]: Start difference. First operand 2009 states and 3978 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:10,387 INFO L93 Difference]: Finished difference Result 2891 states and 5824 transitions. [2021-06-05 15:17:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:17:10,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:10,389 INFO L225 Difference]: With dead ends: 2891 [2021-06-05 15:17:10,389 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 15:17:10,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 15:17:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2006. [2021-06-05 15:17:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 1.9810473815461347) internal successors, (3972), 2005 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3972 transitions. [2021-06-05 15:17:10,406 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3972 transitions. Word has length 36 [2021-06-05 15:17:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:10,407 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 3972 transitions. [2021-06-05 15:17:10,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:10,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3972 transitions. [2021-06-05 15:17:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:10,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:10,408 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:10,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:10,609 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:10,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1829487763, now seen corresponding path program 94 times [2021-06-05 15:17:10,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:10,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060095233] [2021-06-05 15:17:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:10,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:10,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060095233] [2021-06-05 15:17:10,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060095233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:10,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307790021] [2021-06-05 15:17:10,858 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 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 15:17:10,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:10,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:10,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:10,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:11,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:11,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:11,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:11,356 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 89 treesize of output 37 [2021-06-05 15:17:11,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:11,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:11,364 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 15:17:11,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:11,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307790021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:11,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:11,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:17:11,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255708031] [2021-06-05 15:17:11,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:11,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:11,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:11,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:11,373 INFO L87 Difference]: Start difference. First operand 2006 states and 3972 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:12,195 INFO L93 Difference]: Finished difference Result 3270 states and 6540 transitions. [2021-06-05 15:17:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:17:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:12,199 INFO L225 Difference]: With dead ends: 3270 [2021-06-05 15:17:12,199 INFO L226 Difference]: Without dead ends: 3074 [2021-06-05 15:17:12,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:17:12,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-06-05 15:17:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2030. [2021-06-05 15:17:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.9817644159684573) internal successors, (4021), 2029 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4021 transitions. [2021-06-05 15:17:12,227 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4021 transitions. Word has length 36 [2021-06-05 15:17:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:12,227 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 4021 transitions. [2021-06-05 15:17:12,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4021 transitions. [2021-06-05 15:17:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:12,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:12,229 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:12,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 15:17:12,443 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash 407689333, now seen corresponding path program 95 times [2021-06-05 15:17:12,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:12,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110992565] [2021-06-05 15:17:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:12,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:12,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110992565] [2021-06-05 15:17:12,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110992565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:12,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125244879] [2021-06-05 15:17:12,743 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 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 15:17:12,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:17:12,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:12,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:13,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:13,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:13,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:13,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:13,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:13,250 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 89 treesize of output 37 [2021-06-05 15:17:13,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:13,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:13,258 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 15:17:13,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:13,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125244879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:13,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:13,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:13,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111227545] [2021-06-05 15:17:13,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:13,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:13,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:13,268 INFO L87 Difference]: Start difference. First operand 2030 states and 4021 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:13,829 INFO L93 Difference]: Finished difference Result 3018 states and 6082 transitions. [2021-06-05 15:17:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:17:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:13,832 INFO L225 Difference]: With dead ends: 3018 [2021-06-05 15:17:13,832 INFO L226 Difference]: Without dead ends: 2956 [2021-06-05 15:17:13,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 671.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-06-05 15:17:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2051. [2021-06-05 15:17:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-06-05 15:17:13,854 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-06-05 15:17:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:13,854 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-06-05 15:17:13,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:13,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-06-05 15:17:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:13,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:13,855 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:14,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 15:17:14,056 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:14,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1143941907, now seen corresponding path program 96 times [2021-06-05 15:17:14,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:14,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809309670] [2021-06-05 15:17:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:14,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:14,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809309670] [2021-06-05 15:17:14,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809309670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:14,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977254714] [2021-06-05 15:17:14,306 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 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 15:17:14,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:17:14,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:14,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:17:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:14,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:14,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:14,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:14,814 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 91 treesize of output 37 [2021-06-05 15:17:14,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:14,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:14,822 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 15:17:14,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 15:17:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:14,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977254714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:14,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:14,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:14,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570153938] [2021-06-05 15:17:14,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:14,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:14,832 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:15,184 INFO L93 Difference]: Finished difference Result 2747 states and 5507 transitions. [2021-06-05 15:17:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:17:15,184 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:15,186 INFO L225 Difference]: With dead ends: 2747 [2021-06-05 15:17:15,186 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 15:17:15,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 15:17:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2051. [2021-06-05 15:17:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-06-05 15:17:15,204 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-06-05 15:17:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:15,204 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-06-05 15:17:15,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-06-05 15:17:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:15,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:15,205 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:15,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:15,406 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash 939265351, now seen corresponding path program 97 times [2021-06-05 15:17:15,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:15,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068027562] [2021-06-05 15:17:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:17:15,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:15,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068027562] [2021-06-05 15:17:15,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068027562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:15,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546132068] [2021-06-05 15:17:15,649 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 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 15:17:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:15,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:16,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:16,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:16,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:16,135 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 89 treesize of output 37 [2021-06-05 15:17:16,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:16,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:16,144 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 15:17:16,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:16,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546132068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:16,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:16,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 15:17:16,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768813978] [2021-06-05 15:17:16,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:17:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:17:16,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:17:16,153 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:17:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:16,530 INFO L93 Difference]: Finished difference Result 3042 states and 6095 transitions. [2021-06-05 15:17:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:17:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 36 [2021-06-05 15:17:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:16,533 INFO L225 Difference]: With dead ends: 3042 [2021-06-05 15:17:16,533 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 15:17:16,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 683.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 15:17:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2141. [2021-06-05 15:17:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 1.983177570093458) internal successors, (4244), 2140 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:16,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 4244 transitions. [2021-06-05 15:17:16,551 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 4244 transitions. Word has length 36 [2021-06-05 15:17:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:16,551 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 4244 transitions. [2021-06-05 15:17:16,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:17:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 4244 transitions. [2021-06-05 15:17:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:16,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:16,552 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:16,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 15:17:16,754 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:16,755 INFO L82 PathProgramCache]: Analyzing trace with hash -534706753, now seen corresponding path program 98 times [2021-06-05 15:17:16,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:16,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368690185] [2021-06-05 15:17:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:17,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368690185] [2021-06-05 15:17:17,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368690185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610787729] [2021-06-05 15:17:17,026 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 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 15:17:17,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:17:17,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:17,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:17,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:17,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:17,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:17,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:17,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:17,524 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 89 treesize of output 37 [2021-06-05 15:17:17,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:17,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:17,533 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 15:17:17,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:17,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610787729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:17,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:17,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:17:17,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777024505] [2021-06-05 15:17:17,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:17,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:17,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:17,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:17,542 INFO L87 Difference]: Start difference. First operand 2141 states and 4244 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:18,095 INFO L93 Difference]: Finished difference Result 3881 states and 7802 transitions. [2021-06-05 15:17:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:17:18,095 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:18,098 INFO L225 Difference]: With dead ends: 3881 [2021-06-05 15:17:18,098 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 15:17:18,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 629.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 15:17:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2072. [2021-06-05 15:17:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.981651376146789) internal successors, (4104), 2071 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4104 transitions. [2021-06-05 15:17:18,120 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4104 transitions. Word has length 36 [2021-06-05 15:17:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:18,120 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4104 transitions. [2021-06-05 15:17:18,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4104 transitions. [2021-06-05 15:17:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:18,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:18,121 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:18,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 15:17:18,322 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash -501889653, now seen corresponding path program 99 times [2021-06-05 15:17:18,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:18,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305665121] [2021-06-05 15:17:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:18,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:18,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305665121] [2021-06-05 15:17:18,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305665121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:18,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679980562] [2021-06-05 15:17:18,605 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 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 15:17:18,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:17:18,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:18,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:19,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:19,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:19,129 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 89 treesize of output 37 [2021-06-05 15:17:19,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:19,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:19,137 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 15:17:19,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:19,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679980562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:19,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:19,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:19,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143179086] [2021-06-05 15:17:19,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:19,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:19,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:19,147 INFO L87 Difference]: Start difference. First operand 2072 states and 4104 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:19,556 INFO L93 Difference]: Finished difference Result 3168 states and 6373 transitions. [2021-06-05 15:17:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:17:19,556 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:19,559 INFO L225 Difference]: With dead ends: 3168 [2021-06-05 15:17:19,559 INFO L226 Difference]: Without dead ends: 3111 [2021-06-05 15:17:19,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-05 15:17:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2114. [2021-06-05 15:17:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 15:17:19,584 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 15:17:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:19,584 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 15:17:19,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 15:17:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:19,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:19,586 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:19,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 15:17:19,801 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:19,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2053520893, now seen corresponding path program 100 times [2021-06-05 15:17:19,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:19,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708244632] [2021-06-05 15:17:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:20,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:20,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708244632] [2021-06-05 15:17:20,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708244632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:20,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641070668] [2021-06-05 15:17:20,058 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 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 15:17:20,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:20,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:20,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:20,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:20,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:20,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:20,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:20,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:20,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:20,583 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 89 treesize of output 37 [2021-06-05 15:17:20,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:20,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:20,591 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 15:17:20,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:20,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641070668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:20,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:20,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331603262] [2021-06-05 15:17:20,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:20,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:20,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:20,601 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:20,904 INFO L93 Difference]: Finished difference Result 2764 states and 5529 transitions. [2021-06-05 15:17:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:17:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:20,907 INFO L225 Difference]: With dead ends: 2764 [2021-06-05 15:17:20,907 INFO L226 Difference]: Without dead ends: 2741 [2021-06-05 15:17:20,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-06-05 15:17:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2114. [2021-06-05 15:17:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 15:17:20,924 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 15:17:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:20,924 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 15:17:20,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 15:17:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:20,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:20,926 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:21,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:21,127 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1050580755, now seen corresponding path program 101 times [2021-06-05 15:17:21,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:21,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110244482] [2021-06-05 15:17:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:21,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110244482] [2021-06-05 15:17:21,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110244482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531538623] [2021-06-05 15:17:21,372 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 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 15:17:21,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:17:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:21,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:21,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:21,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:21,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:21,911 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 89 treesize of output 37 [2021-06-05 15:17:21,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:21,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:21,922 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 15:17:21,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:21,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531538623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:21,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:21,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:21,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809782604] [2021-06-05 15:17:21,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:21,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:21,932 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:22,416 INFO L93 Difference]: Finished difference Result 2775 states and 5552 transitions. [2021-06-05 15:17:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:17:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:22,420 INFO L225 Difference]: With dead ends: 2775 [2021-06-05 15:17:22,420 INFO L226 Difference]: Without dead ends: 2751 [2021-06-05 15:17:22,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:22,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-06-05 15:17:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2114. [2021-06-05 15:17:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-05 15:17:22,440 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-05 15:17:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:22,440 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-05 15:17:22,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-05 15:17:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:22,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:22,442 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:22,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 15:17:22,643 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1598664591, now seen corresponding path program 102 times [2021-06-05 15:17:22,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:22,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747890996] [2021-06-05 15:17:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:17:22,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:22,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747890996] [2021-06-05 15:17:22,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747890996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:22,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039037271] [2021-06-05 15:17:22,872 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 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 15:17:22,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:17:22,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:22,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:17:22,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:23,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:23,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:23,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:23,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:23,397 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 89 treesize of output 37 [2021-06-05 15:17:23,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:23,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:23,405 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 15:17:23,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:23,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039037271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:23,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:23,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-05 15:17:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012644275] [2021-06-05 15:17:23,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:17:23,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:17:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:17:23,414 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:17:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:23,792 INFO L93 Difference]: Finished difference Result 3031 states and 6075 transitions. [2021-06-05 15:17:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:17:23,793 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 36 [2021-06-05 15:17:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:23,795 INFO L225 Difference]: With dead ends: 3031 [2021-06-05 15:17:23,795 INFO L226 Difference]: Without dead ends: 2851 [2021-06-05 15:17:23,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 699.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-05 15:17:23,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2204. [2021-06-05 15:17:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9809350885156605) internal successors, (4364), 2203 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4364 transitions. [2021-06-05 15:17:23,814 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4364 transitions. Word has length 36 [2021-06-05 15:17:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:23,814 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4364 transitions. [2021-06-05 15:17:23,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 15:17:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4364 transitions. [2021-06-05 15:17:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:23,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:23,815 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:24,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 15:17:24,016 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:24,016 INFO L82 PathProgramCache]: Analyzing trace with hash 124692487, now seen corresponding path program 103 times [2021-06-05 15:17:24,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:24,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451643896] [2021-06-05 15:17:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:24,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:24,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451643896] [2021-06-05 15:17:24,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451643896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:24,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703152752] [2021-06-05 15:17:24,255 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 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 15:17:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:24,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:24,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:24,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:24,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:24,764 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 89 treesize of output 37 [2021-06-05 15:17:24,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:24,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:24,772 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 15:17:24,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:24,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703152752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:24,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:24,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:17:24,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630783193] [2021-06-05 15:17:24,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:24,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:24,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:24,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:24,781 INFO L87 Difference]: Start difference. First operand 2204 states and 4364 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:25,200 INFO L93 Difference]: Finished difference Result 3432 states and 6914 transitions. [2021-06-05 15:17:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:17:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:25,203 INFO L225 Difference]: With dead ends: 3432 [2021-06-05 15:17:25,203 INFO L226 Difference]: Without dead ends: 3379 [2021-06-05 15:17:25,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 619.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-06-05 15:17:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 2192. [2021-06-05 15:17:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.9808306709265175) internal successors, (4340), 2191 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 4340 transitions. [2021-06-05 15:17:25,229 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 4340 transitions. Word has length 36 [2021-06-05 15:17:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:25,229 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 4340 transitions. [2021-06-05 15:17:25,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 4340 transitions. [2021-06-05 15:17:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:25,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:25,232 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:25,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:25,453 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1579308017, now seen corresponding path program 104 times [2021-06-05 15:17:25,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:25,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935763095] [2021-06-05 15:17:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:25,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:25,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935763095] [2021-06-05 15:17:25,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935763095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:25,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763196378] [2021-06-05 15:17:25,695 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 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 15:17:25,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:17:25,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:25,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:26,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:26,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:26,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:26,200 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 89 treesize of output 37 [2021-06-05 15:17:26,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:26,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:26,208 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 15:17:26,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:26,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763196378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:26,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:26,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:17:26,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814408342] [2021-06-05 15:17:26,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:26,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:26,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:26,218 INFO L87 Difference]: Start difference. First operand 2192 states and 4340 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:26,745 INFO L93 Difference]: Finished difference Result 3344 states and 6703 transitions. [2021-06-05 15:17:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:17:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:26,748 INFO L225 Difference]: With dead ends: 3344 [2021-06-05 15:17:26,748 INFO L226 Difference]: Without dead ends: 3283 [2021-06-05 15:17:26,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 612.2ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-05 15:17:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2207. [2021-06-05 15:17:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.9805077062556664) internal successors, (4369), 2206 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 4369 transitions. [2021-06-05 15:17:26,770 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 4369 transitions. Word has length 36 [2021-06-05 15:17:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:26,770 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 4369 transitions. [2021-06-05 15:17:26,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 4369 transitions. [2021-06-05 15:17:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:26,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:26,772 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:26,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:26,973 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash 157509587, now seen corresponding path program 105 times [2021-06-05 15:17:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385095949] [2021-06-05 15:17:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:27,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:27,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385095949] [2021-06-05 15:17:27,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385095949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719847432] [2021-06-05 15:17:27,235 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 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 15:17:27,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:17:27,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:27,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:27,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:27,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:27,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:27,753 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 89 treesize of output 37 [2021-06-05 15:17:27,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:27,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:27,761 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 15:17:27,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:27,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719847432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:27,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:27,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:27,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375382333] [2021-06-05 15:17:27,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:27,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:27,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:27,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:27,771 INFO L87 Difference]: Start difference. First operand 2207 states and 4369 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:28,142 INFO L93 Difference]: Finished difference Result 3254 states and 6538 transitions. [2021-06-05 15:17:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:17:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:28,145 INFO L225 Difference]: With dead ends: 3254 [2021-06-05 15:17:28,145 INFO L226 Difference]: Without dead ends: 3197 [2021-06-05 15:17:28,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 643.4ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-06-05 15:17:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2195. [2021-06-05 15:17:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.980401093892434) internal successors, (4345), 2194 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4345 transitions. [2021-06-05 15:17:28,166 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4345 transitions. Word has length 36 [2021-06-05 15:17:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:28,166 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 4345 transitions. [2021-06-05 15:17:28,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4345 transitions. [2021-06-05 15:17:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:28,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:28,168 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:28,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:28,386 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1394121653, now seen corresponding path program 106 times [2021-06-05 15:17:28,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:28,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712759362] [2021-06-05 15:17:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:28,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:28,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712759362] [2021-06-05 15:17:28,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712759362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:28,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453774599] [2021-06-05 15:17:28,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:28,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:28,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:28,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:28,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:29,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:29,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:29,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:29,224 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 89 treesize of output 37 [2021-06-05 15:17:29,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:29,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:29,232 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 15:17:29,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:29,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453774599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:29,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:29,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:29,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091636000] [2021-06-05 15:17:29,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:29,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:29,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:29,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:29,242 INFO L87 Difference]: Start difference. First operand 2195 states and 4345 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:29,834 INFO L93 Difference]: Finished difference Result 2867 states and 5731 transitions. [2021-06-05 15:17:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:17:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:29,837 INFO L225 Difference]: With dead ends: 2867 [2021-06-05 15:17:29,837 INFO L226 Difference]: Without dead ends: 2844 [2021-06-05 15:17:29,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 674.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2021-06-05 15:17:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2204. [2021-06-05 15:17:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-06-05 15:17:29,854 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-06-05 15:17:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:29,854 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-06-05 15:17:29,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-06-05 15:17:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:29,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:29,856 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:30,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:30,056 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash -391181515, now seen corresponding path program 107 times [2021-06-05 15:17:30,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:30,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819862020] [2021-06-05 15:17:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:30,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819862020] [2021-06-05 15:17:30,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819862020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714295942] [2021-06-05 15:17:30,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:30,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:17:30,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:30,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:30,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:30,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:30,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:30,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:30,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:30,819 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 89 treesize of output 37 [2021-06-05 15:17:30,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:30,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:30,827 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 15:17:30,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:30,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714295942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:30,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:30,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:30,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845347002] [2021-06-05 15:17:30,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:30,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:30,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:30,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:30,836 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:31,354 INFO L93 Difference]: Finished difference Result 2878 states and 5754 transitions. [2021-06-05 15:17:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:17:31,354 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:31,357 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 15:17:31,357 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 15:17:31,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 621.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 15:17:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2204. [2021-06-05 15:17:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-06-05 15:17:31,374 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-06-05 15:17:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:31,374 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-06-05 15:17:31,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-06-05 15:17:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:31,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:31,376 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:31,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 15:17:31,576 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1155151443, now seen corresponding path program 108 times [2021-06-05 15:17:31,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:31,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609078513] [2021-06-05 15:17:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:31,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:31,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609078513] [2021-06-05 15:17:31,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609078513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:31,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139156538] [2021-06-05 15:17:31,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:31,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:17:31,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:31,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:17:31,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:32,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:32,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:32,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:32,379 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 89 treesize of output 37 [2021-06-05 15:17:32,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:32,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:32,387 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 15:17:32,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:32,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139156538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:32,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:32,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:32,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382082826] [2021-06-05 15:17:32,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:32,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:32,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:32,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:32,396 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:32,905 INFO L93 Difference]: Finished difference Result 3075 states and 6179 transitions. [2021-06-05 15:17:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:17:32,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:32,907 INFO L225 Difference]: With dead ends: 3075 [2021-06-05 15:17:32,908 INFO L226 Difference]: Without dead ends: 2931 [2021-06-05 15:17:32,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 656.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-06-05 15:17:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2247. [2021-06-05 15:17:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.9821905609973285) internal successors, (4452), 2246 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 4452 transitions. [2021-06-05 15:17:32,926 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 4452 transitions. Word has length 36 [2021-06-05 15:17:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:32,926 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 4452 transitions. [2021-06-05 15:17:32,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 4452 transitions. [2021-06-05 15:17:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:32,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:32,928 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:33,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 15:17:33,128 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1735088919, now seen corresponding path program 109 times [2021-06-05 15:17:33,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:33,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939367316] [2021-06-05 15:17:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:17:33,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:33,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939367316] [2021-06-05 15:17:33,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939367316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:33,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068399892] [2021-06-05 15:17:33,352 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 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 15:17:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:33,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:33,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:33,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:33,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:33,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:33,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:33,834 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 89 treesize of output 37 [2021-06-05 15:17:33,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:33,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:33,842 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 15:17:33,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:33,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068399892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:33,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:33,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-05 15:17:33,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743755302] [2021-06-05 15:17:33,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:33,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:33,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:33,874 INFO L87 Difference]: Start difference. First operand 2247 states and 4452 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:34,285 INFO L93 Difference]: Finished difference Result 4634 states and 9317 transitions. [2021-06-05 15:17:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:17:34,286 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:34,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:34,290 INFO L225 Difference]: With dead ends: 4634 [2021-06-05 15:17:34,290 INFO L226 Difference]: Without dead ends: 4591 [2021-06-05 15:17:34,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 681.4ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:17:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-06-05 15:17:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 2286. [2021-06-05 15:17:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 1.9785557986870896) internal successors, (4521), 2285 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4521 transitions. [2021-06-05 15:17:34,317 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4521 transitions. Word has length 36 [2021-06-05 15:17:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:34,317 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 4521 transitions. [2021-06-05 15:17:34,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4521 transitions. [2021-06-05 15:17:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:34,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:34,319 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:34,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 15:17:34,520 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:34,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1139316895, now seen corresponding path program 110 times [2021-06-05 15:17:34,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:34,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134448091] [2021-06-05 15:17:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:34,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:34,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134448091] [2021-06-05 15:17:34,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134448091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:34,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966489015] [2021-06-05 15:17:34,760 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 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 15:17:34,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:17:34,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:34,784 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:17:34,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:35,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:35,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:35,235 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 91 treesize of output 37 [2021-06-05 15:17:35,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:35,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:35,244 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 15:17:35,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-05 15:17:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:35,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966489015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:35,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:35,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:35,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653935667] [2021-06-05 15:17:35,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:35,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:35,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:35,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:35,276 INFO L87 Difference]: Start difference. First operand 2286 states and 4521 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 15:17:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:35,856 INFO L93 Difference]: Finished difference Result 4423 states and 8911 transitions. [2021-06-05 15:17:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:17:35,856 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 36 [2021-06-05 15:17:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:35,860 INFO L225 Difference]: With dead ends: 4423 [2021-06-05 15:17:35,860 INFO L226 Difference]: Without dead ends: 4375 [2021-06-05 15:17:35,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 719.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:17:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2021-06-05 15:17:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 2331. [2021-06-05 15:17:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 1.978969957081545) internal successors, (4611), 2330 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4611 transitions. [2021-06-05 15:17:35,887 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4611 transitions. Word has length 36 [2021-06-05 15:17:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:35,887 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 4611 transitions. [2021-06-05 15:17:35,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 15:17:35,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4611 transitions. [2021-06-05 15:17:35,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:35,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:35,890 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:36,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:36,105 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:36,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:36,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1250362455, now seen corresponding path program 111 times [2021-06-05 15:17:36,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:36,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228945103] [2021-06-05 15:17:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:36,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:36,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228945103] [2021-06-05 15:17:36,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228945103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:36,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777834475] [2021-06-05 15:17:36,355 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 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 15:17:36,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:17:36,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:36,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:36,852 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 89 treesize of output 37 [2021-06-05 15:17:36,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:36,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:36,861 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 15:17:36,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:36,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777834475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:36,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:36,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:36,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258007843] [2021-06-05 15:17:36,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:36,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:36,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:36,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:36,893 INFO L87 Difference]: Start difference. First operand 2331 states and 4611 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 15:17:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:37,575 INFO L93 Difference]: Finished difference Result 4274 states and 8601 transitions. [2021-06-05 15:17:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:17:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 36 [2021-06-05 15:17:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:37,579 INFO L225 Difference]: With dead ends: 4274 [2021-06-05 15:17:37,579 INFO L226 Difference]: Without dead ends: 4231 [2021-06-05 15:17:37,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 780.3ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:17:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-05 15:17:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2382. [2021-06-05 15:17:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 1.9794204115917682) internal successors, (4713), 2381 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 4713 transitions. [2021-06-05 15:17:37,605 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 4713 transitions. Word has length 36 [2021-06-05 15:17:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:37,605 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 4713 transitions. [2021-06-05 15:17:37,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 15:17:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 4713 transitions. [2021-06-05 15:17:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:37,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:37,607 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:37,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 15:17:37,809 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1492973601, now seen corresponding path program 112 times [2021-06-05 15:17:37,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:37,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632597365] [2021-06-05 15:17:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:38,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:38,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632597365] [2021-06-05 15:17:38,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632597365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:38,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422869029] [2021-06-05 15:17:38,072 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 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 15:17:38,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:38,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:38,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:38,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:38,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:38,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:38,567 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 89 treesize of output 37 [2021-06-05 15:17:38,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:38,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:38,576 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 15:17:38,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:38,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422869029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:38,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:38,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 15:17:38,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128397930] [2021-06-05 15:17:38,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 15:17:38,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:38,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 15:17:38,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:38,612 INFO L87 Difference]: Start difference. First operand 2382 states and 4713 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 15:17:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:39,317 INFO L93 Difference]: Finished difference Result 4262 states and 8590 transitions. [2021-06-05 15:17:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:17:39,318 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 36 [2021-06-05 15:17:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:39,321 INFO L225 Difference]: With dead ends: 4262 [2021-06-05 15:17:39,321 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 15:17:39,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 817.5ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:17:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 15:17:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 2372. [2021-06-05 15:17:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 1.9801771404470687) internal successors, (4695), 2371 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 4695 transitions. [2021-06-05 15:17:39,347 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 4695 transitions. Word has length 36 [2021-06-05 15:17:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:39,347 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 4695 transitions. [2021-06-05 15:17:39,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 15:17:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 4695 transitions. [2021-06-05 15:17:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:39,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:39,349 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:39,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:39,549 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:39,550 INFO L82 PathProgramCache]: Analyzing trace with hash 140658571, now seen corresponding path program 113 times [2021-06-05 15:17:39,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:39,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019735344] [2021-06-05 15:17:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:39,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:39,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019735344] [2021-06-05 15:17:39,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019735344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:39,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745049974] [2021-06-05 15:17:39,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:39,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:17:39,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:39,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:17:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:40,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:40,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:40,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:40,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-05 15:17:40,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:40,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:40,416 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 15:17:40,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 15:17:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:40,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745049974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:40,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-05 15:17:40,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553651860] [2021-06-05 15:17:40,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:17:40,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:17:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:17:40,438 INFO L87 Difference]: Start difference. First operand 2372 states and 4695 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 15:17:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:42,009 INFO L93 Difference]: Finished difference Result 3919 states and 7823 transitions. [2021-06-05 15:17:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:17:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 36 [2021-06-05 15:17:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:42,012 INFO L225 Difference]: With dead ends: 3919 [2021-06-05 15:17:42,012 INFO L226 Difference]: Without dead ends: 3722 [2021-06-05 15:17:42,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1374.6ms TimeCoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:17:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-06-05 15:17:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2432. [2021-06-05 15:17:42,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 1.9819004524886878) internal successors, (4818), 2431 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 4818 transitions. [2021-06-05 15:17:42,035 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 4818 transitions. Word has length 36 [2021-06-05 15:17:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:42,035 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 4818 transitions. [2021-06-05 15:17:42,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 15:17:42,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 4818 transitions. [2021-06-05 15:17:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:42,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:42,037 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:42,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 15:17:42,241 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -768920415, now seen corresponding path program 114 times [2021-06-05 15:17:42,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:42,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705838293] [2021-06-05 15:17:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:42,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:42,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705838293] [2021-06-05 15:17:42,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705838293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:42,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610390952] [2021-06-05 15:17:42,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:42,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:17:42,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:42,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:17:42,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:42,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:42,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:42,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:42,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:42,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:42,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:42,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:43,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:43,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:43,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:43,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:43,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:43,003 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 89 treesize of output 37 [2021-06-05 15:17:43,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:43,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:43,012 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 15:17:43,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:43,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610390952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:43,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:43,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 15:17:43,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205901106] [2021-06-05 15:17:43,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:43,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:43,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:43,021 INFO L87 Difference]: Start difference. First operand 2432 states and 4818 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:43,441 INFO L93 Difference]: Finished difference Result 3994 states and 7991 transitions. [2021-06-05 15:17:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:17:43,441 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:43,445 INFO L225 Difference]: With dead ends: 3994 [2021-06-05 15:17:43,445 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 15:17:43,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 624.8ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 15:17:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2486. [2021-06-05 15:17:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:43,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-06-05 15:17:43,470 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-06-05 15:17:43,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:43,470 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-06-05 15:17:43,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-06-05 15:17:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:43,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:43,472 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:43,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:43,673 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash 234019723, now seen corresponding path program 115 times [2021-06-05 15:17:43,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:43,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055917289] [2021-06-05 15:17:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:43,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:43,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055917289] [2021-06-05 15:17:43,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055917289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:43,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720221282] [2021-06-05 15:17:43,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:43,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:44,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:44,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:44,436 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 89 treesize of output 37 [2021-06-05 15:17:44,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:44,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:44,444 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 15:17:44,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:44,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720221282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:44,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:44,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 15:17:44,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549261993] [2021-06-05 15:17:44,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:44,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:44,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:44,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:44,454 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:45,037 INFO L93 Difference]: Finished difference Result 3663 states and 7313 transitions. [2021-06-05 15:17:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:17:45,037 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:45,040 INFO L225 Difference]: With dead ends: 3663 [2021-06-05 15:17:45,040 INFO L226 Difference]: Without dead ends: 3639 [2021-06-05 15:17:45,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-06-05 15:17:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2486. [2021-06-05 15:17:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-06-05 15:17:45,065 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-06-05 15:17:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:45,065 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-06-05 15:17:45,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-06-05 15:17:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:45,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:45,066 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:45,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:45,267 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash 726123041, now seen corresponding path program 116 times [2021-06-05 15:17:45,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:45,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702646061] [2021-06-05 15:17:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:17:45,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:45,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702646061] [2021-06-05 15:17:45,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702646061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:45,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061465083] [2021-06-05 15:17:45,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:45,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:17:45,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:45,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:45,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:46,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:46,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:46,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:46,027 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 89 treesize of output 37 [2021-06-05 15:17:46,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:46,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:46,035 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 15:17:46,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:46,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061465083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:46,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:46,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2021-06-05 15:17:46,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807213964] [2021-06-05 15:17:46,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:17:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:17:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:17:46,044 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:46,445 INFO L93 Difference]: Finished difference Result 3578 states and 7155 transitions. [2021-06-05 15:17:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:17:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:46,448 INFO L225 Difference]: With dead ends: 3578 [2021-06-05 15:17:46,448 INFO L226 Difference]: Without dead ends: 3364 [2021-06-05 15:17:46,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-06-05 15:17:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 2624. [2021-06-05 15:17:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 1.9797941288600838) internal successors, (5193), 2623 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 5193 transitions. [2021-06-05 15:17:46,473 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 5193 transitions. Word has length 36 [2021-06-05 15:17:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:46,473 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 5193 transitions. [2021-06-05 15:17:46,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 5193 transitions. [2021-06-05 15:17:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:46,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:46,475 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:46,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 15:17:46,675 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:46,675 INFO L82 PathProgramCache]: Analyzing trace with hash 144742215, now seen corresponding path program 117 times [2021-06-05 15:17:46,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:46,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474006244] [2021-06-05 15:17:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:17:46,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:46,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474006244] [2021-06-05 15:17:46,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474006244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:46,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857043328] [2021-06-05 15:17:46,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:46,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:17:46,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:46,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:46,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:47,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:47,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:47,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:47,334 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 89 treesize of output 37 [2021-06-05 15:17:47,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:47,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:47,342 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 15:17:47,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:47,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857043328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:47,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:47,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-06-05 15:17:47,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052950869] [2021-06-05 15:17:47,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:17:47,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:17:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:17:47,352 INFO L87 Difference]: Start difference. First operand 2624 states and 5193 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 15:17:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:47,805 INFO L93 Difference]: Finished difference Result 3703 states and 7416 transitions. [2021-06-05 15:17:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:17:47,805 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 36 [2021-06-05 15:17:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:47,808 INFO L225 Difference]: With dead ends: 3703 [2021-06-05 15:17:47,808 INFO L226 Difference]: Without dead ends: 3490 [2021-06-05 15:17:47,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:17:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-05 15:17:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2501. [2021-06-05 15:17:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-06-05 15:17:47,833 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-06-05 15:17:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:47,833 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-06-05 15:17:47,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 15:17:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-06-05 15:17:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:47,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:47,835 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:48,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 15:17:48,035 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:48,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1446923267, now seen corresponding path program 118 times [2021-06-05 15:17:48,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:48,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326079146] [2021-06-05 15:17:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:48,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:48,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326079146] [2021-06-05 15:17:48,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326079146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:48,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361491708] [2021-06-05 15:17:48,282 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 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 15:17:48,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:48,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:48,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:48,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:48,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:48,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:48,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:48,774 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 89 treesize of output 37 [2021-06-05 15:17:48,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:48,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:48,782 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 15:17:48,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:48,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361491708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:48,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:48,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 15:17:48,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73509068] [2021-06-05 15:17:48,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:48,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:48,792 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:49,485 INFO L93 Difference]: Finished difference Result 3628 states and 7297 transitions. [2021-06-05 15:17:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:17:49,486 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:49,489 INFO L225 Difference]: With dead ends: 3628 [2021-06-05 15:17:49,489 INFO L226 Difference]: Without dead ends: 3563 [2021-06-05 15:17:49,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-05 15:17:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2501. [2021-06-05 15:17:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-06-05 15:17:49,516 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-06-05 15:17:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:49,516 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-06-05 15:17:49,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-06-05 15:17:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:49,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:49,518 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:49,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:49,719 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash 537344281, now seen corresponding path program 119 times [2021-06-05 15:17:49,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:49,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197395533] [2021-06-05 15:17:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:49,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:49,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197395533] [2021-06-05 15:17:49,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197395533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:49,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751810266] [2021-06-05 15:17:49,983 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 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 15:17:50,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:17:50,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:50,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:17:50,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:50,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:50,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:50,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:50,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:50,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-05 15:17:50,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:50,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:50,582 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 15:17:50,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 15:17:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:50,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751810266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:50,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:50,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-05 15:17:50,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111818339] [2021-06-05 15:17:50,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:17:50,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:17:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:17:50,604 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 15:17:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:52,174 INFO L93 Difference]: Finished difference Result 3874 states and 7764 transitions. [2021-06-05 15:17:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:17:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 36 [2021-06-05 15:17:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:52,178 INFO L225 Difference]: With dead ends: 3874 [2021-06-05 15:17:52,178 INFO L226 Difference]: Without dead ends: 3713 [2021-06-05 15:17:52,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1574.8ms TimeCoverageRelationStatistics Valid=214, Invalid=2648, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:17:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-06-05 15:17:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2540. [2021-06-05 15:17:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-06-05 15:17:52,201 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-06-05 15:17:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:52,201 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-06-05 15:17:52,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 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 15:17:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-06-05 15:17:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:52,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:52,203 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:52,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 15:17:52,404 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1540284419, now seen corresponding path program 120 times [2021-06-05 15:17:52,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:52,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372325904] [2021-06-05 15:17:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:52,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:52,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372325904] [2021-06-05 15:17:52,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372325904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:52,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592078528] [2021-06-05 15:17:52,672 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 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 15:17:52,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:17:52,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:52,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:52,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:53,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:53,181 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 89 treesize of output 37 [2021-06-05 15:17:53,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:53,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:53,189 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 15:17:53,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:53,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592078528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:53,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:53,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 15:17:53,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038263805] [2021-06-05 15:17:53,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:53,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:53,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:53,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:53,199 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:53,832 INFO L93 Difference]: Finished difference Result 3517 states and 7032 transitions. [2021-06-05 15:17:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:17:53,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:53,835 INFO L225 Difference]: With dead ends: 3517 [2021-06-05 15:17:53,835 INFO L226 Difference]: Without dead ends: 3493 [2021-06-05 15:17:53,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-06-05 15:17:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2540. [2021-06-05 15:17:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-06-05 15:17:53,858 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-06-05 15:17:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:53,858 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-06-05 15:17:53,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-06-05 15:17:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:53,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:53,860 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:54,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:54,060 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1196743521, now seen corresponding path program 121 times [2021-06-05 15:17:54,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:54,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980126374] [2021-06-05 15:17:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:54,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:54,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980126374] [2021-06-05 15:17:54,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980126374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:54,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377959747] [2021-06-05 15:17:54,399 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 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 15:17:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:54,437 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:54,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:54,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:54,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:54,908 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 89 treesize of output 37 [2021-06-05 15:17:54,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:54,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:54,935 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 15:17:54,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:54,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377959747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:54,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:54,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 15:17:54,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458629064] [2021-06-05 15:17:54,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:54,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:54,946 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:55,418 INFO L93 Difference]: Finished difference Result 3604 states and 7227 transitions. [2021-06-05 15:17:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:17:55,419 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:55,422 INFO L225 Difference]: With dead ends: 3604 [2021-06-05 15:17:55,422 INFO L226 Difference]: Without dead ends: 3560 [2021-06-05 15:17:55,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 700.7ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-06-05 15:17:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2534. [2021-06-05 15:17:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-06-05 15:17:55,452 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-06-05 15:17:55,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:55,453 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-06-05 15:17:55,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:55,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-06-05 15:17:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:55,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:55,454 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:55,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 15:17:55,670 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:55,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2095283637, now seen corresponding path program 122 times [2021-06-05 15:17:55,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:55,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694197542] [2021-06-05 15:17:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:55,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:55,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694197542] [2021-06-05 15:17:55,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694197542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:55,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923105739] [2021-06-05 15:17:55,930 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 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 15:17:55,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:17:55,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:55,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:56,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:56,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:56,424 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 89 treesize of output 37 [2021-06-05 15:17:56,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:56,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:56,432 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 15:17:56,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:56,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923105739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:56,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:56,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 15:17:56,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298267317] [2021-06-05 15:17:56,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:56,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:56,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:56,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:56,442 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:57,130 INFO L93 Difference]: Finished difference Result 3514 states and 7026 transitions. [2021-06-05 15:17:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:17:57,130 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:57,133 INFO L225 Difference]: With dead ends: 3514 [2021-06-05 15:17:57,133 INFO L226 Difference]: Without dead ends: 3490 [2021-06-05 15:17:57,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 628.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-05 15:17:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2531. [2021-06-05 15:17:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 1.9837944664031621) internal successors, (5019), 2530 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 5019 transitions. [2021-06-05 15:17:57,160 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 5019 transitions. Word has length 36 [2021-06-05 15:17:57,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:57,160 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 5019 transitions. [2021-06-05 15:17:57,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 5019 transitions. [2021-06-05 15:17:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:57,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:57,163 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:57,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:17:57,386 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:57,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1435713731, now seen corresponding path program 123 times [2021-06-05 15:17:57,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:57,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475425118] [2021-06-05 15:17:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:57,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:57,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475425118] [2021-06-05 15:17:57,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475425118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:57,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028965457] [2021-06-05 15:17:57,638 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 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 15:17:57,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:17:57,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:57,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:58,146 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 89 treesize of output 37 [2021-06-05 15:17:58,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:58,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:58,154 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 15:17:58,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:58,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028965457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:58,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:58,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-05 15:17:58,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432672217] [2021-06-05 15:17:58,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:17:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:17:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:17:58,163 INFO L87 Difference]: Start difference. First operand 2531 states and 5019 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:17:58,883 INFO L93 Difference]: Finished difference Result 3529 states and 7060 transitions. [2021-06-05 15:17:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:17:58,884 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:17:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:17:58,887 INFO L225 Difference]: With dead ends: 3529 [2021-06-05 15:17:58,887 INFO L226 Difference]: Without dead ends: 3504 [2021-06-05 15:17:58,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:17:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-06-05 15:17:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 2534. [2021-06-05 15:17:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-06-05 15:17:58,917 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-06-05 15:17:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:17:58,917 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-06-05 15:17:58,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:17:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-06-05 15:17:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:17:58,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:17:58,919 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:17:59,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:17:59,119 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:17:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:17:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1768497397, now seen corresponding path program 124 times [2021-06-05 15:17:59,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:17:59,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592524357] [2021-06-05 15:17:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:17:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:17:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:17:59,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:17:59,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592524357] [2021-06-05 15:17:59,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592524357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764772266] [2021-06-05 15:17:59,436 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 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 15:17:59,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:17:59,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:17:59,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:17:59,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:17:59,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:59,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:17:59,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:17:59,921 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 89 treesize of output 37 [2021-06-05 15:17:59,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:17:59,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:17:59,932 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 15:17:59,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:17:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:17:59,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764772266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:17:59,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:17:59,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 15:17:59,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502605] [2021-06-05 15:17:59,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:17:59,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:17:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:17:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:17:59,944 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 15:18:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:00,319 INFO L93 Difference]: Finished difference Result 3439 states and 6862 transitions. [2021-06-05 15:18:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:18:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-05 15:18:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:00,322 INFO L225 Difference]: With dead ends: 3439 [2021-06-05 15:18:00,322 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 15:18:00,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 767.9ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:18:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 15:18:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2606. [2021-06-05 15:18:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.982341650671785) internal successors, (5164), 2605 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 5164 transitions. [2021-06-05 15:18:00,345 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 5164 transitions. Word has length 36 [2021-06-05 15:18:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:00,345 INFO L482 AbstractCegarLoop]: Abstraction has 2606 states and 5164 transitions. [2021-06-05 15:18:00,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 15:18:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 5164 transitions. [2021-06-05 15:18:00,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:00,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:00,346 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:00,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:18:00,547 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1516299603, now seen corresponding path program 125 times [2021-06-05 15:18:00,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:00,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860086076] [2021-06-05 15:18:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:18:00,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:00,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860086076] [2021-06-05 15:18:00,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860086076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:00,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879358295] [2021-06-05 15:18:00,796 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 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 15:18:00,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:18:00,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:00,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:18:00,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:01,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:01,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:01,226 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 89 treesize of output 37 [2021-06-05 15:18:01,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:01,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:01,235 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 15:18:01,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:01,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879358295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:01,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:01,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 15:18:01,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815724003] [2021-06-05 15:18:01,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:18:01,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:18:01,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:18:01,244 INFO L87 Difference]: Start difference. First operand 2606 states and 5164 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 15:18:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:01,740 INFO L93 Difference]: Finished difference Result 3655 states and 7282 transitions. [2021-06-05 15:18:01,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:18:01,740 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-05 15:18:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:01,743 INFO L225 Difference]: With dead ends: 3655 [2021-06-05 15:18:01,743 INFO L226 Difference]: Without dead ends: 3429 [2021-06-05 15:18:01,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:18:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-06-05 15:18:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2750. [2021-06-05 15:18:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.9774463441251364) internal successors, (5436), 2749 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 5436 transitions. [2021-06-05 15:18:01,767 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 5436 transitions. Word has length 36 [2021-06-05 15:18:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:01,767 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 5436 transitions. [2021-06-05 15:18:01,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 15:18:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 5436 transitions. [2021-06-05 15:18:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:01,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:01,769 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:01,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:01,969 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:01,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1945089073, now seen corresponding path program 126 times [2021-06-05 15:18:01,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:01,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036870938] [2021-06-05 15:18:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:18:02,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:02,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036870938] [2021-06-05 15:18:02,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036870938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:02,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270128151] [2021-06-05 15:18:02,208 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 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 15:18:02,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:18:02,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:02,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:02,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:02,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:02,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:02,691 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 89 treesize of output 37 [2021-06-05 15:18:02,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:02,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:02,699 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 15:18:02,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:02,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270128151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:02,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:02,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 15:18:02,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80387727] [2021-06-05 15:18:02,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:02,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:02,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:02,709 INFO L87 Difference]: Start difference. First operand 2750 states and 5436 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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 15:18:03,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:03,298 INFO L93 Difference]: Finished difference Result 4517 states and 8999 transitions. [2021-06-05 15:18:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:18:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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 36 [2021-06-05 15:18:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:03,302 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 15:18:03,302 INFO L226 Difference]: Without dead ends: 4275 [2021-06-05 15:18:03,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:18:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-06-05 15:18:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3137. [2021-06-05 15:18:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 1.9716198979591837) internal successors, (6183), 3136 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 6183 transitions. [2021-06-05 15:18:03,332 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 6183 transitions. Word has length 36 [2021-06-05 15:18:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:03,332 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 6183 transitions. [2021-06-05 15:18:03,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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 15:18:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 6183 transitions. [2021-06-05 15:18:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:03,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:03,334 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:03,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:03,535 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:03,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1047697171, now seen corresponding path program 127 times [2021-06-05 15:18:03,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:03,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810590862] [2021-06-05 15:18:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:03,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:03,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810590862] [2021-06-05 15:18:03,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810590862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:03,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710315952] [2021-06-05 15:18:03,904 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 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 15:18:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:03,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:03,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:04,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:04,354 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 89 treesize of output 37 [2021-06-05 15:18:04,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:04,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:04,363 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 15:18:04,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:04,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710315952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:04,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:04,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 15:18:04,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569432576] [2021-06-05 15:18:04,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:04,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:04,373 INFO L87 Difference]: Start difference. First operand 3137 states and 6183 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:04,982 INFO L93 Difference]: Finished difference Result 4057 states and 8128 transitions. [2021-06-05 15:18:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:04,986 INFO L225 Difference]: With dead ends: 4057 [2021-06-05 15:18:04,986 INFO L226 Difference]: Without dead ends: 3966 [2021-06-05 15:18:04,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 655.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:18:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-06-05 15:18:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3158. [2021-06-05 15:18:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 1.9718086791257523) internal successors, (6225), 3157 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 6225 transitions. [2021-06-05 15:18:05,016 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 6225 transitions. Word has length 36 [2021-06-05 15:18:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:05,016 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 6225 transitions. [2021-06-05 15:18:05,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 6225 transitions. [2021-06-05 15:18:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:05,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:05,018 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:05,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:05,218 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1035510087, now seen corresponding path program 128 times [2021-06-05 15:18:05,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:05,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343608298] [2021-06-05 15:18:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:18:05,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343608298] [2021-06-05 15:18:05,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343608298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100861226] [2021-06-05 15:18:05,452 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 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 15:18:05,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:18:05,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:05,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:05,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:05,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:05,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:05,878 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 89 treesize of output 37 [2021-06-05 15:18:05,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:05,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:05,887 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 15:18:05,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:05,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100861226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:05,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:05,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 15:18:05,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047936764] [2021-06-05 15:18:05,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:18:05,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:05,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:18:05,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:18:05,896 INFO L87 Difference]: Start difference. First operand 3158 states and 6225 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 15:18:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:06,386 INFO L93 Difference]: Finished difference Result 4075 states and 8096 transitions. [2021-06-05 15:18:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:18:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-05 15:18:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:06,389 INFO L225 Difference]: With dead ends: 4075 [2021-06-05 15:18:06,390 INFO L226 Difference]: Without dead ends: 3853 [2021-06-05 15:18:06,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 692.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:18:06,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2021-06-05 15:18:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3251. [2021-06-05 15:18:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 3250 states have (on average 1.9726153846153847) internal successors, (6411), 3250 states have internal predecessors, (6411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 6411 transitions. [2021-06-05 15:18:06,418 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 6411 transitions. Word has length 36 [2021-06-05 15:18:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:06,418 INFO L482 AbstractCegarLoop]: Abstraction has 3251 states and 6411 transitions. [2021-06-05 15:18:06,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 15:18:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 6411 transitions. [2021-06-05 15:18:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:06,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:06,420 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:06,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:06,621 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash -438462017, now seen corresponding path program 129 times [2021-06-05 15:18:06,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:06,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397349680] [2021-06-05 15:18:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:06,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:06,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397349680] [2021-06-05 15:18:06,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397349680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:06,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939087549] [2021-06-05 15:18:06,867 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 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 15:18:06,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:18:06,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:06,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:07,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:07,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:07,306 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 89 treesize of output 37 [2021-06-05 15:18:07,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:07,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:07,316 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 15:18:07,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:07,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939087549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:07,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:07,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 15:18:07,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284450392] [2021-06-05 15:18:07,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:07,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:07,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:07,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:07,325 INFO L87 Difference]: Start difference. First operand 3251 states and 6411 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:07,775 INFO L93 Difference]: Finished difference Result 5265 states and 10504 transitions. [2021-06-05 15:18:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:18:07,775 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:07,780 INFO L225 Difference]: With dead ends: 5265 [2021-06-05 15:18:07,780 INFO L226 Difference]: Without dead ends: 5202 [2021-06-05 15:18:07,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 583.3ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:18:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2021-06-05 15:18:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 3164. [2021-06-05 15:18:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 1.971862156180841) internal successors, (6237), 3163 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 6237 transitions. [2021-06-05 15:18:07,817 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 6237 transitions. Word has length 36 [2021-06-05 15:18:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:07,817 INFO L482 AbstractCegarLoop]: Abstraction has 3164 states and 6237 transitions. [2021-06-05 15:18:07,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 6237 transitions. [2021-06-05 15:18:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:07,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:07,819 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:08,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 15:18:08,020 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1957276157, now seen corresponding path program 130 times [2021-06-05 15:18:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:08,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932506900] [2021-06-05 15:18:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:08,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932506900] [2021-06-05 15:18:08,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932506900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:08,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656968717] [2021-06-05 15:18:08,349 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 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 15:18:08,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:18:08,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:08,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:08,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:08,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:08,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:08,829 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 89 treesize of output 37 [2021-06-05 15:18:08,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:08,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:08,839 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 15:18:08,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:08,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656968717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:08,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:08,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 15:18:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86447787] [2021-06-05 15:18:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:08,848 INFO L87 Difference]: Start difference. First operand 3164 states and 6237 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:09,449 INFO L93 Difference]: Finished difference Result 4252 states and 8498 transitions. [2021-06-05 15:18:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:09,453 INFO L225 Difference]: With dead ends: 4252 [2021-06-05 15:18:09,453 INFO L226 Difference]: Without dead ends: 4193 [2021-06-05 15:18:09,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:18:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-05 15:18:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3191. [2021-06-05 15:18:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-06-05 15:18:09,484 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-06-05 15:18:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:09,484 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-06-05 15:18:09,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-06-05 15:18:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:09,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:09,486 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:09,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 15:18:09,687 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash -954336019, now seen corresponding path program 131 times [2021-06-05 15:18:09,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:09,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389475063] [2021-06-05 15:18:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:09,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:09,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389475063] [2021-06-05 15:18:09,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389475063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:09,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576869817] [2021-06-05 15:18:09,947 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 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 15:18:09,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:18:09,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:09,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:09,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:10,493 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 89 treesize of output 37 [2021-06-05 15:18:10,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:10,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:10,501 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 15:18:10,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:10,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576869817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:10,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:10,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 15:18:10,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938456541] [2021-06-05 15:18:10,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:10,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:10,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:10,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:10,510 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:10,745 INFO L93 Difference]: Finished difference Result 3853 states and 7654 transitions. [2021-06-05 15:18:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:10,745 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:10,748 INFO L225 Difference]: With dead ends: 3853 [2021-06-05 15:18:10,748 INFO L226 Difference]: Without dead ends: 3829 [2021-06-05 15:18:10,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 650.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:18:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-06-05 15:18:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3191. [2021-06-05 15:18:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-06-05 15:18:10,776 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-06-05 15:18:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:10,776 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-06-05 15:18:10,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-06-05 15:18:10,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:10,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:10,778 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:10,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 15:18:10,981 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1694909327, now seen corresponding path program 132 times [2021-06-05 15:18:10,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:10,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26466476] [2021-06-05 15:18:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:18:11,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:11,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26466476] [2021-06-05 15:18:11,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26466476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:11,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780050834] [2021-06-05 15:18:11,223 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 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 15:18:11,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:18:11,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:11,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:11,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:11,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:11,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:11,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:11,684 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 89 treesize of output 37 [2021-06-05 15:18:11,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:11,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:11,692 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 15:18:11,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:11,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780050834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:11,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:11,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-05 15:18:11,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83841922] [2021-06-05 15:18:11,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:18:11,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:11,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:18:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:18:11,701 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 15:18:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:12,133 INFO L93 Difference]: Finished difference Result 4117 states and 8186 transitions. [2021-06-05 15:18:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:18:12,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-05 15:18:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:12,137 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 15:18:12,137 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 15:18:12,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:18:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 15:18:12,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3290. [2021-06-05 15:18:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.9723320158102766) internal successors, (6487), 3289 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 6487 transitions. [2021-06-05 15:18:12,166 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 6487 transitions. Word has length 36 [2021-06-05 15:18:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:12,166 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 6487 transitions. [2021-06-05 15:18:12,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 15:18:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 6487 transitions. [2021-06-05 15:18:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:12,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:12,168 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:12,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:12,368 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:12,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 220937223, now seen corresponding path program 133 times [2021-06-05 15:18:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:12,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765185450] [2021-06-05 15:18:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:12,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:12,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765185450] [2021-06-05 15:18:12,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765185450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:12,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164858949] [2021-06-05 15:18:12,675 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 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 15:18:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:12,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:12,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:13,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:13,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:13,121 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 89 treesize of output 37 [2021-06-05 15:18:13,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:13,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:13,129 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 15:18:13,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:13,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164858949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:13,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:13,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 15:18:13,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541740873] [2021-06-05 15:18:13,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:13,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:13,138 INFO L87 Difference]: Start difference. First operand 3290 states and 6487 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:13,605 INFO L93 Difference]: Finished difference Result 4583 states and 9168 transitions. [2021-06-05 15:18:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:18:13,605 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:13,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:13,610 INFO L225 Difference]: With dead ends: 4583 [2021-06-05 15:18:13,610 INFO L226 Difference]: Without dead ends: 4530 [2021-06-05 15:18:13,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:18:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4530 states. [2021-06-05 15:18:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4530 to 3230. [2021-06-05 15:18:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.9733663672963766) internal successors, (6372), 3229 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 6372 transitions. [2021-06-05 15:18:13,645 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 6372 transitions. Word has length 36 [2021-06-05 15:18:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:13,645 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 6372 transitions. [2021-06-05 15:18:13,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 6372 transitions. [2021-06-05 15:18:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:13,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:13,647 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:13,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 15:18:13,848 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:13,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:13,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1675552753, now seen corresponding path program 134 times [2021-06-05 15:18:13,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:13,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844201127] [2021-06-05 15:18:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:14,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:14,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844201127] [2021-06-05 15:18:14,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844201127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:14,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48481479] [2021-06-05 15:18:14,108 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 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 15:18:14,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:18:14,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:14,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:14,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:14,551 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 89 treesize of output 37 [2021-06-05 15:18:14,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:14,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:14,559 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 15:18:14,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:14,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48481479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:14,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:14,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 15:18:14,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136149668] [2021-06-05 15:18:14,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:14,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:14,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:14,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:14,570 INFO L87 Difference]: Start difference. First operand 3230 states and 6372 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:14,988 INFO L93 Difference]: Finished difference Result 4673 states and 9315 transitions. [2021-06-05 15:18:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:18:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:14,993 INFO L225 Difference]: With dead ends: 4673 [2021-06-05 15:18:14,993 INFO L226 Difference]: Without dead ends: 4610 [2021-06-05 15:18:14,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 596.5ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:18:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-06-05 15:18:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3248. [2021-06-05 15:18:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 1.9728980597474592) internal successors, (6406), 3247 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 6406 transitions. [2021-06-05 15:18:15,025 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 6406 transitions. Word has length 36 [2021-06-05 15:18:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:15,025 INFO L482 AbstractCegarLoop]: Abstraction has 3248 states and 6406 transitions. [2021-06-05 15:18:15,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 6406 transitions. [2021-06-05 15:18:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:15,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:15,027 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:15,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:15,228 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1297876917, now seen corresponding path program 135 times [2021-06-05 15:18:15,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:15,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241818648] [2021-06-05 15:18:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:15,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:15,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241818648] [2021-06-05 15:18:15,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241818648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:15,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735821919] [2021-06-05 15:18:15,520 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 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 15:18:15,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:18:15,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:15,545 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:15,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:15,972 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 89 treesize of output 37 [2021-06-05 15:18:15,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:15,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:15,980 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 15:18:15,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:15,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735821919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:15,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:15,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 15:18:15,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444279884] [2021-06-05 15:18:15,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:15,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:15,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:15,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:15,989 INFO L87 Difference]: Start difference. First operand 3248 states and 6406 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:16,498 INFO L93 Difference]: Finished difference Result 4370 states and 8737 transitions. [2021-06-05 15:18:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:16,498 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:16,501 INFO L225 Difference]: With dead ends: 4370 [2021-06-05 15:18:16,501 INFO L226 Difference]: Without dead ends: 4311 [2021-06-05 15:18:16,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:18:16,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-05 15:18:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3263. [2021-06-05 15:18:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 15:18:16,535 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 15:18:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:16,535 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 15:18:16,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 15:18:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:16,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:16,537 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:16,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:16,737 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:16,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:16,738 INFO L82 PathProgramCache]: Analyzing trace with hash -294936779, now seen corresponding path program 136 times [2021-06-05 15:18:16,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:16,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422464008] [2021-06-05 15:18:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:17,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:17,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422464008] [2021-06-05 15:18:17,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422464008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:17,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348989817] [2021-06-05 15:18:17,009 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 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 15:18:17,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:18:17,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:17,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:17,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:17,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:17,462 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 89 treesize of output 37 [2021-06-05 15:18:17,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:17,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:17,470 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 15:18:17,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:17,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348989817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:17,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:17,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 15:18:17,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514779748] [2021-06-05 15:18:17,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:17,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:17,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:17,480 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:17,912 INFO L93 Difference]: Finished difference Result 3962 states and 7874 transitions. [2021-06-05 15:18:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:17,912 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:17,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:17,916 INFO L225 Difference]: With dead ends: 3962 [2021-06-05 15:18:17,916 INFO L226 Difference]: Without dead ends: 3938 [2021-06-05 15:18:17,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:18:17,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-06-05 15:18:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3263. [2021-06-05 15:18:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 15:18:17,954 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 15:18:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:17,954 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 15:18:17,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 15:18:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:17,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:17,956 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:18,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:18,157 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1058906707, now seen corresponding path program 137 times [2021-06-05 15:18:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:18,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152522004] [2021-06-05 15:18:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:18,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:18,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152522004] [2021-06-05 15:18:18,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152522004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:18,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014367719] [2021-06-05 15:18:18,470 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 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 15:18:18,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:18:18,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:18,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:18:18,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:18,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:18,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:18,959 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 89 treesize of output 37 [2021-06-05 15:18:18,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:18,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:18,967 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 15:18:18,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:18,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014367719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:18,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:18,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 15:18:18,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639166714] [2021-06-05 15:18:18,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:18,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:18,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:18,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:18,977 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:19,340 INFO L93 Difference]: Finished difference Result 3982 states and 7910 transitions. [2021-06-05 15:18:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:18:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:19,344 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 15:18:19,344 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 15:18:19,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:18:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 15:18:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3263. [2021-06-05 15:18:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-05 15:18:19,378 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-05 15:18:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:19,378 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-05 15:18:19,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-05 15:18:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:19,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:19,380 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:19,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:19,581 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash -532135131, now seen corresponding path program 138 times [2021-06-05 15:18:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:19,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979024174] [2021-06-05 15:18:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:18:19,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:19,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979024174] [2021-06-05 15:18:19,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979024174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:19,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434307177] [2021-06-05 15:18:19,887 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 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 15:18:19,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:18:19,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:19,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:19,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:20,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:20,409 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 89 treesize of output 37 [2021-06-05 15:18:20,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:20,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:20,420 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 15:18:20,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:20,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434307177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:20,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:20,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-06-05 15:18:20,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077615634] [2021-06-05 15:18:20,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:18:20,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:18:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:18:20,430 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 15:18:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:20,919 INFO L93 Difference]: Finished difference Result 4128 states and 8203 transitions. [2021-06-05 15:18:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:18:20,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 36 [2021-06-05 15:18:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:20,923 INFO L225 Difference]: With dead ends: 4128 [2021-06-05 15:18:20,923 INFO L226 Difference]: Without dead ends: 3903 [2021-06-05 15:18:20,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 876.9ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:18:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2021-06-05 15:18:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3338. [2021-06-05 15:18:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9733293377284986) internal successors, (6585), 3337 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6585 transitions. [2021-06-05 15:18:20,952 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6585 transitions. Word has length 36 [2021-06-05 15:18:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:20,952 INFO L482 AbstractCegarLoop]: Abstraction has 3338 states and 6585 transitions. [2021-06-05 15:18:20,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 15:18:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6585 transitions. [2021-06-05 15:18:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:20,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:20,954 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:21,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:21,154 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:21,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2006107235, now seen corresponding path program 139 times [2021-06-05 15:18:21,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:21,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757424920] [2021-06-05 15:18:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:21,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:21,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757424920] [2021-06-05 15:18:21,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757424920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:21,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526801429] [2021-06-05 15:18:21,511 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 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 15:18:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:21,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:21,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:21,977 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 89 treesize of output 37 [2021-06-05 15:18:21,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:21,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:21,986 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 15:18:21,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:21,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526801429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:21,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:21,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-06-05 15:18:21,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946270199] [2021-06-05 15:18:21,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:18:21,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:21,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:18:21,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:18:21,995 INFO L87 Difference]: Start difference. First operand 3338 states and 6585 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:22,358 INFO L93 Difference]: Finished difference Result 4598 states and 9201 transitions. [2021-06-05 15:18:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:22,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:22,363 INFO L225 Difference]: With dead ends: 4598 [2021-06-05 15:18:22,363 INFO L226 Difference]: Without dead ends: 4545 [2021-06-05 15:18:22,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 701.3ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-06-05 15:18:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3326. [2021-06-05 15:18:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.973233082706767) internal successors, (6561), 3325 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 6561 transitions. [2021-06-05 15:18:22,395 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 6561 transitions. Word has length 36 [2021-06-05 15:18:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:22,395 INFO L482 AbstractCegarLoop]: Abstraction has 3326 states and 6561 transitions. [2021-06-05 15:18:22,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 6561 transitions. [2021-06-05 15:18:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:22,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:22,397 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:22,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 15:18:22,598 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:22,598 INFO L82 PathProgramCache]: Analyzing trace with hash -551491705, now seen corresponding path program 140 times [2021-06-05 15:18:22,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:22,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004562569] [2021-06-05 15:18:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:22,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004562569] [2021-06-05 15:18:22,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004562569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291476686] [2021-06-05 15:18:22,837 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 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 15:18:22,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:18:22,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:22,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:23,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:23,266 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 89 treesize of output 37 [2021-06-05 15:18:23,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:23,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:23,274 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 15:18:23,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:23,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291476686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:23,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:23,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-06-05 15:18:23,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970670365] [2021-06-05 15:18:23,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:18:23,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:18:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:18:23,284 INFO L87 Difference]: Start difference. First operand 3326 states and 6561 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:23,603 INFO L93 Difference]: Finished difference Result 4391 states and 8752 transitions. [2021-06-05 15:18:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:23,603 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:23,607 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 15:18:23,607 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 15:18:23,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 15:18:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3344. [2021-06-05 15:18:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.9736763386180078) internal successors, (6598), 3343 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 6598 transitions. [2021-06-05 15:18:23,638 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 6598 transitions. Word has length 36 [2021-06-05 15:18:23,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:23,638 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 6598 transitions. [2021-06-05 15:18:23,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:23,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 6598 transitions. [2021-06-05 15:18:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:23,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:23,640 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:23,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 15:18:23,840 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash 300524031, now seen corresponding path program 141 times [2021-06-05 15:18:23,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:23,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179587648] [2021-06-05 15:18:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:24,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179587648] [2021-06-05 15:18:24,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179587648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370182705] [2021-06-05 15:18:24,075 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 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 15:18:24,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:18:24,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:24,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 15:18:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:24,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:24,635 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 87 treesize of output 37 [2021-06-05 15:18:24,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:24,652 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-06-05 15:18:24,653 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 15:18:24,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:10 [2021-06-05 15:18:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:24,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370182705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:24,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:24,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-05 15:18:24,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786362435] [2021-06-05 15:18:24,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:24,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:24,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:24,662 INFO L87 Difference]: Start difference. First operand 3344 states and 6598 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:25,727 INFO L93 Difference]: Finished difference Result 4634 states and 9234 transitions. [2021-06-05 15:18:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:18:25,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:25,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:25,731 INFO L225 Difference]: With dead ends: 4634 [2021-06-05 15:18:25,731 INFO L226 Difference]: Without dead ends: 4520 [2021-06-05 15:18:25,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1089.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:18:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2021-06-05 15:18:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3368. [2021-06-05 15:18:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 1.9747549747549749) internal successors, (6649), 3367 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 6649 transitions. [2021-06-05 15:18:25,766 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 6649 transitions. Word has length 36 [2021-06-05 15:18:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:25,766 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 6649 transitions. [2021-06-05 15:18:25,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 6649 transitions. [2021-06-05 15:18:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:25,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:25,768 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:25,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 15:18:25,973 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash 770045921, now seen corresponding path program 142 times [2021-06-05 15:18:25,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:25,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354432714] [2021-06-05 15:18:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:26,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:26,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354432714] [2021-06-05 15:18:26,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354432714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:26,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818478214] [2021-06-05 15:18:26,337 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 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 15:18:26,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:18:26,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:26,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:26,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:26,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:26,852 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 89 treesize of output 37 [2021-06-05 15:18:26,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:26,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:26,861 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 15:18:26,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:26,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818478214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:26,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:26,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-05 15:18:26,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872077506] [2021-06-05 15:18:26,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:26,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:26,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:26,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:26,870 INFO L87 Difference]: Start difference. First operand 3368 states and 6649 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:27,192 INFO L93 Difference]: Finished difference Result 4433 states and 8859 transitions. [2021-06-05 15:18:27,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:27,192 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:27,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:27,196 INFO L225 Difference]: With dead ends: 4433 [2021-06-05 15:18:27,196 INFO L226 Difference]: Without dead ends: 4374 [2021-06-05 15:18:27,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:18:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2021-06-05 15:18:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 3356. [2021-06-05 15:18:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-06-05 15:18:27,229 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-06-05 15:18:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:27,230 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-06-05 15:18:27,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-06-05 15:18:27,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:27,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:27,232 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:27,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:18:27,432 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:27,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1772986059, now seen corresponding path program 143 times [2021-06-05 15:18:27,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:27,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643578605] [2021-06-05 15:18:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:27,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643578605] [2021-06-05 15:18:27,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643578605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:27,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206275141] [2021-06-05 15:18:27,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:27,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:18:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:27,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:27,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:28,130 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 89 treesize of output 37 [2021-06-05 15:18:28,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:28,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:28,138 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 15:18:28,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:28,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206275141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:28,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:28,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-05 15:18:28,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635761236] [2021-06-05 15:18:28,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:28,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:28,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:28,147 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:28,518 INFO L93 Difference]: Finished difference Result 4113 states and 8183 transitions. [2021-06-05 15:18:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:18:28,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:28,522 INFO L225 Difference]: With dead ends: 4113 [2021-06-05 15:18:28,522 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 15:18:28,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:18:28,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 15:18:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3356. [2021-06-05 15:18:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-06-05 15:18:28,552 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-06-05 15:18:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:28,552 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-06-05 15:18:28,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-06-05 15:18:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:28,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:28,554 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:28,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:28,755 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:28,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:28,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1009016131, now seen corresponding path program 144 times [2021-06-05 15:18:28,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:28,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405141822] [2021-06-05 15:18:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:29,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:29,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405141822] [2021-06-05 15:18:29,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405141822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:29,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245764865] [2021-06-05 15:18:29,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:29,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:18:29,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:29,080 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:29,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:29,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:29,876 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 83 treesize of output 37 [2021-06-05 15:18:29,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:29,895 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-05 15:18:29,896 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 15:18:29,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-06-05 15:18:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:29,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245764865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:29,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:29,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-05 15:18:29,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856982239] [2021-06-05 15:18:29,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:18:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:29,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:18:29,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:29,905 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 15:18:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:33,111 INFO L93 Difference]: Finished difference Result 4097 states and 8147 transitions. [2021-06-05 15:18:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:18:33,111 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 36 [2021-06-05 15:18:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:33,114 INFO L225 Difference]: With dead ends: 4097 [2021-06-05 15:18:33,114 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 15:18:33,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1875.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:18:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 15:18:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3353. [2021-06-05 15:18:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 1.974343675417661) internal successors, (6618), 3352 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 6618 transitions. [2021-06-05 15:18:33,142 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 6618 transitions. Word has length 36 [2021-06-05 15:18:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:33,142 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 6618 transitions. [2021-06-05 15:18:33,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 15:18:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 6618 transitions. [2021-06-05 15:18:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:18:33,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:33,144 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:33,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 15:18:33,344 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1533152851, now seen corresponding path program 145 times [2021-06-05 15:18:33,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:33,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125415869] [2021-06-05 15:18:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:33,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:33,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125415869] [2021-06-05 15:18:33,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125415869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:33,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068161002] [2021-06-05 15:18:33,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:33,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:34,028 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 15:18:34,028 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 89 treesize of output 37 [2021-06-05 15:18:34,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:34,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:34,035 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 15:18:34,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:10 [2021-06-05 15:18:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:34,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068161002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:34,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:34,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-06-05 15:18:34,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835098062] [2021-06-05 15:18:34,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:18:34,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:18:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:18:34,047 INFO L87 Difference]: Start difference. First operand 3353 states and 6618 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:34,516 INFO L93 Difference]: Finished difference Result 3920 states and 7778 transitions. [2021-06-05 15:18:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:18:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:18:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:34,520 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 15:18:34,520 INFO L226 Difference]: Without dead ends: 3905 [2021-06-05 15:18:34,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:18:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-06-05 15:18:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3360. [2021-06-05 15:18:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 1.9746948496576362) internal successors, (6633), 3359 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:34,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 6633 transitions. [2021-06-05 15:18:34,550 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 6633 transitions. Word has length 36 [2021-06-05 15:18:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:34,550 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 6633 transitions. [2021-06-05 15:18:34,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 6633 transitions. [2021-06-05 15:18:34,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:18:34,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:34,552 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:34,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:34,753 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash 297908302, now seen corresponding path program 146 times [2021-06-05 15:18:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:34,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676009114] [2021-06-05 15:18:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:34,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:34,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676009114] [2021-06-05 15:18:34,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676009114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:34,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467062152] [2021-06-05 15:18:34,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:34,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:18:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:34,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 15:18:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:34,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467062152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:34,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:34,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 15:18:34,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119145198] [2021-06-05 15:18:34,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:18:34,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:34,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:18:34,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:18:34,880 INFO L87 Difference]: Start difference. First operand 3360 states and 6633 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:34,912 INFO L93 Difference]: Finished difference Result 3841 states and 7613 transitions. [2021-06-05 15:18:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:18:34,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:18:34,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:34,914 INFO L225 Difference]: With dead ends: 3841 [2021-06-05 15:18:34,914 INFO L226 Difference]: Without dead ends: 3830 [2021-06-05 15:18:34,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:18:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-06-05 15:18:34,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3470. [2021-06-05 15:18:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 1.9824156817526666) internal successors, (6877), 3469 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 6877 transitions. [2021-06-05 15:18:34,948 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 6877 transitions. Word has length 38 [2021-06-05 15:18:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:34,948 INFO L482 AbstractCegarLoop]: Abstraction has 3470 states and 6877 transitions. [2021-06-05 15:18:34,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 6877 transitions. [2021-06-05 15:18:34,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:18:34,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:34,950 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:35,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:35,151 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1224230535, now seen corresponding path program 147 times [2021-06-05 15:18:35,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:35,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071165678] [2021-06-05 15:18:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:35,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071165678] [2021-06-05 15:18:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071165678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695698996] [2021-06-05 15:18:35,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:35,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:18:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:35,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:35,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:35,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:35,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:35,880 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 89 treesize of output 37 [2021-06-05 15:18:35,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:35,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:35,888 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 15:18:35,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:35,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695698996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:35,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:35,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 15:18:35,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090519567] [2021-06-05 15:18:35,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:35,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:35,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:35,897 INFO L87 Difference]: Start difference. First operand 3470 states and 6877 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:36,557 INFO L93 Difference]: Finished difference Result 4514 states and 9036 transitions. [2021-06-05 15:18:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:18:36,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:18:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:36,561 INFO L225 Difference]: With dead ends: 4514 [2021-06-05 15:18:36,562 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 15:18:36,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 796.0ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:18:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 15:18:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3509. [2021-06-05 15:18:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-06-05 15:18:36,605 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-06-05 15:18:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:36,605 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-06-05 15:18:36,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-06-05 15:18:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:18:36,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:36,607 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:36,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:36,808 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2076785471, now seen corresponding path program 148 times [2021-06-05 15:18:36,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:36,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985923777] [2021-06-05 15:18:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:37,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:37,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985923777] [2021-06-05 15:18:37,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985923777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:37,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890014801] [2021-06-05 15:18:37,038 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 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 15:18:37,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:18:37,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:37,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:37,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:37,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:37,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:37,484 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 89 treesize of output 37 [2021-06-05 15:18:37,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:37,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:37,492 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 15:18:37,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:37,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890014801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:37,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:37,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 15:18:37,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716535579] [2021-06-05 15:18:37,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:37,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:37,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:37,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:37,501 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:38,021 INFO L93 Difference]: Finished difference Result 4780 states and 9544 transitions. [2021-06-05 15:18:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:18:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:18:38,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:38,026 INFO L225 Difference]: With dead ends: 4780 [2021-06-05 15:18:38,026 INFO L226 Difference]: Without dead ends: 4735 [2021-06-05 15:18:38,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 766.6ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:18:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-06-05 15:18:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 3509. [2021-06-05 15:18:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-06-05 15:18:38,059 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-06-05 15:18:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:38,060 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-06-05 15:18:38,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-06-05 15:18:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:18:38,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:38,062 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:38,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:38,263 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:38,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:38,263 INFO L82 PathProgramCache]: Analyzing trace with hash 101428265, now seen corresponding path program 149 times [2021-06-05 15:18:38,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:38,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012659938] [2021-06-05 15:18:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:38,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012659938] [2021-06-05 15:18:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012659938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480860317] [2021-06-05 15:18:38,507 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 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 15:18:38,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:18:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:38,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:38,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:39,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:39,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-05 15:18:39,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:39,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:39,057 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 15:18:39,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-05 15:18:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:39,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480860317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:39,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:39,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-05 15:18:39,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156161884] [2021-06-05 15:18:39,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:18:39,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:18:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:18:39,078 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:40,150 INFO L93 Difference]: Finished difference Result 4916 states and 9863 transitions. [2021-06-05 15:18:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:18:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:18:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:40,155 INFO L225 Difference]: With dead ends: 4916 [2021-06-05 15:18:40,155 INFO L226 Difference]: Without dead ends: 4871 [2021-06-05 15:18:40,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1147.5ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:18:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-05 15:18:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3533. [2021-06-05 15:18:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 1.9818799546998866) internal successors, (7000), 3532 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 7000 transitions. [2021-06-05 15:18:40,189 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 7000 transitions. Word has length 39 [2021-06-05 15:18:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:40,189 INFO L482 AbstractCegarLoop]: Abstraction has 3533 states and 7000 transitions. [2021-06-05 15:18:40,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 7000 transitions. [2021-06-05 15:18:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:18:40,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:40,192 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:40,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:40,392 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:40,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1574344523, now seen corresponding path program 150 times [2021-06-05 15:18:40,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:40,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170614456] [2021-06-05 15:18:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:40,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:40,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170614456] [2021-06-05 15:18:40,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170614456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:40,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197619336] [2021-06-05 15:18:40,633 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 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 15:18:40,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:18:40,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:40,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:41,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:41,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:41,081 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 89 treesize of output 37 [2021-06-05 15:18:41,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:41,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:41,089 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 15:18:41,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:41,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197619336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:41,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:41,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 15:18:41,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238804024] [2021-06-05 15:18:41,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:41,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:41,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:41,099 INFO L87 Difference]: Start difference. First operand 3533 states and 7000 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 15:18:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:41,952 INFO L93 Difference]: Finished difference Result 5103 states and 10179 transitions. [2021-06-05 15:18:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:18:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 39 [2021-06-05 15:18:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:41,957 INFO L225 Difference]: With dead ends: 5103 [2021-06-05 15:18:41,957 INFO L226 Difference]: Without dead ends: 4891 [2021-06-05 15:18:41,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 854.6ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:18:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-06-05 15:18:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3611. [2021-06-05 15:18:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 1.9817174515235456) internal successors, (7154), 3610 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 7154 transitions. [2021-06-05 15:18:41,991 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 7154 transitions. Word has length 39 [2021-06-05 15:18:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:41,991 INFO L482 AbstractCegarLoop]: Abstraction has 3611 states and 7154 transitions. [2021-06-05 15:18:41,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 15:18:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 7154 transitions. [2021-06-05 15:18:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:18:41,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:41,994 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:42,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 15:18:42,195 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash 935790731, now seen corresponding path program 151 times [2021-06-05 15:18:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:42,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493123321] [2021-06-05 15:18:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:42,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493123321] [2021-06-05 15:18:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493123321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173451979] [2021-06-05 15:18:42,457 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 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 15:18:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:42,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:42,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:42,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:42,904 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 89 treesize of output 37 [2021-06-05 15:18:42,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:42,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:42,912 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 15:18:42,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:42,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173451979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:42,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:42,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 15:18:42,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827796847] [2021-06-05 15:18:42,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:42,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:42,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:42,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:42,921 INFO L87 Difference]: Start difference. First operand 3611 states and 7154 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 15:18:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:43,774 INFO L93 Difference]: Finished difference Result 4917 states and 9849 transitions. [2021-06-05 15:18:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:18:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 39 [2021-06-05 15:18:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:43,779 INFO L225 Difference]: With dead ends: 4917 [2021-06-05 15:18:43,779 INFO L226 Difference]: Without dead ends: 4872 [2021-06-05 15:18:43,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 913.4ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:18:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-06-05 15:18:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3671. [2021-06-05 15:18:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.98283378746594) internal successors, (7277), 3670 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7277 transitions. [2021-06-05 15:18:43,815 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7277 transitions. Word has length 39 [2021-06-05 15:18:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:43,815 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7277 transitions. [2021-06-05 15:18:43,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 15:18:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7277 transitions. [2021-06-05 15:18:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:18:43,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:43,817 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:44,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:44,018 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:44,018 INFO L82 PathProgramCache]: Analyzing trace with hash 616889269, now seen corresponding path program 152 times [2021-06-05 15:18:44,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:44,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222325939] [2021-06-05 15:18:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:44,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:44,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222325939] [2021-06-05 15:18:44,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222325939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:44,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533866857] [2021-06-05 15:18:44,258 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 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 15:18:44,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:18:44,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:44,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:18:44,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:44,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:44,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:44,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:44,705 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 89 treesize of output 37 [2021-06-05 15:18:44,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:44,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:44,713 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 15:18:44,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-05 15:18:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:18:44,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533866857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:44,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:44,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-05 15:18:44,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183863770] [2021-06-05 15:18:44,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:18:44,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:18:44,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:18:44,722 INFO L87 Difference]: Start difference. First operand 3671 states and 7277 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 15:18:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:45,547 INFO L93 Difference]: Finished difference Result 5037 states and 10091 transitions. [2021-06-05 15:18:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:18:45,547 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 39 [2021-06-05 15:18:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:45,551 INFO L225 Difference]: With dead ends: 5037 [2021-06-05 15:18:45,551 INFO L226 Difference]: Without dead ends: 4992 [2021-06-05 15:18:45,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 850.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:18:45,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-06-05 15:18:45,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 3698. [2021-06-05 15:18:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3697 states have (on average 1.9829591560724913) internal successors, (7331), 3697 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 7331 transitions. [2021-06-05 15:18:45,587 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 7331 transitions. Word has length 39 [2021-06-05 15:18:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:45,587 INFO L482 AbstractCegarLoop]: Abstraction has 3698 states and 7331 transitions. [2021-06-05 15:18:45,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 15:18:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 7331 transitions. [2021-06-05 15:18:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:45,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:45,590 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:45,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 15:18:45,791 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:45,791 INFO L82 PathProgramCache]: Analyzing trace with hash 490317244, now seen corresponding path program 153 times [2021-06-05 15:18:45,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:45,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691133299] [2021-06-05 15:18:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:18:46,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:46,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691133299] [2021-06-05 15:18:46,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691133299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:46,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262006688] [2021-06-05 15:18:46,091 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 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 15:18:46,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:18:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:46,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 15:18:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:47,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:47,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:47,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:47,190 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 102 treesize of output 44 [2021-06-05 15:18:47,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:47,210 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.9 percent of original size [2021-06-05 15:18:47,211 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 15:18:47,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:123, output treesize:12 [2021-06-05 15:18:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:47,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262006688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:47,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:47,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-06-05 15:18:47,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682691061] [2021-06-05 15:18:47,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:18:47,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:18:47,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:18:47,221 INFO L87 Difference]: Start difference. First operand 3698 states and 7331 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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 15:18:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:49,450 INFO L93 Difference]: Finished difference Result 6069 states and 12152 transitions. [2021-06-05 15:18:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:18:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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 41 [2021-06-05 15:18:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:49,455 INFO L225 Difference]: With dead ends: 6069 [2021-06-05 15:18:49,456 INFO L226 Difference]: Without dead ends: 6002 [2021-06-05 15:18:49,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1277.1ms TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:18:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-06-05 15:18:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 3716. [2021-06-05 15:18:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-06-05 15:18:49,496 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-06-05 15:18:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:49,496 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-06-05 15:18:49,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 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 15:18:49,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-06-05 15:18:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:49,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:49,499 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:49,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 15:18:49,699 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:49,700 INFO L82 PathProgramCache]: Analyzing trace with hash -543142796, now seen corresponding path program 154 times [2021-06-05 15:18:49,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:49,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879782809] [2021-06-05 15:18:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:50,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879782809] [2021-06-05 15:18:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879782809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:50,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940083475] [2021-06-05 15:18:50,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:18:50,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:18:50,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:50,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:18:50,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:50,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:50,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:50,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:50,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:50,766 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 108 treesize of output 44 [2021-06-05 15:18:50,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:50,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:50,774 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 15:18:50,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:18:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:50,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940083475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:50,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:50,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 15:18:50,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456617926] [2021-06-05 15:18:50,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:18:50,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:18:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:18:50,784 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:51,542 INFO L93 Difference]: Finished difference Result 6664 states and 13360 transitions. [2021-06-05 15:18:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:18:51,542 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:18:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:51,548 INFO L225 Difference]: With dead ends: 6664 [2021-06-05 15:18:51,548 INFO L226 Difference]: Without dead ends: 6597 [2021-06-05 15:18:51,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 980.6ms TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:18:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2021-06-05 15:18:51,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 3716. [2021-06-05 15:18:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-06-05 15:18:51,590 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-06-05 15:18:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:51,590 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-06-05 15:18:51,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-06-05 15:18:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:51,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:51,593 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:51,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 15:18:51,794 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:51,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1543593212, now seen corresponding path program 155 times [2021-06-05 15:18:51,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:51,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880657763] [2021-06-05 15:18:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:52,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:52,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880657763] [2021-06-05 15:18:52,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880657763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:52,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502988189] [2021-06-05 15:18:52,113 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 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 15:18:52,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:18:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:52,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:18:52,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:52,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:52,842 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 108 treesize of output 44 [2021-06-05 15:18:52,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:52,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:52,851 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 15:18:52,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:18:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:52,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502988189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:52,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:52,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:18:52,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881115935] [2021-06-05 15:18:52,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:18:52,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:18:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:18:52,860 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:53,641 INFO L93 Difference]: Finished difference Result 7025 states and 14072 transitions. [2021-06-05 15:18:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:18:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:18:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:53,648 INFO L225 Difference]: With dead ends: 7025 [2021-06-05 15:18:53,648 INFO L226 Difference]: Without dead ends: 6922 [2021-06-05 15:18:53,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1020.9ms TimeCoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:18:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2021-06-05 15:18:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 3857. [2021-06-05 15:18:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 1.97899377593361) internal successors, (7631), 3856 states have internal predecessors, (7631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 7631 transitions. [2021-06-05 15:18:53,694 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 7631 transitions. Word has length 41 [2021-06-05 15:18:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:53,694 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 7631 transitions. [2021-06-05 15:18:53,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 7631 transitions. [2021-06-05 15:18:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:53,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:53,697 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:53,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:53,907 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash -13013580, now seen corresponding path program 156 times [2021-06-05 15:18:53,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:53,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098204321] [2021-06-05 15:18:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:54,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:54,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098204321] [2021-06-05 15:18:54,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098204321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:54,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867848488] [2021-06-05 15:18:54,243 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 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 15:18:54,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 15:18:54,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:54,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:18:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:54,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:54,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:54,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:54,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:54,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:54,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:54,974 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 108 treesize of output 44 [2021-06-05 15:18:54,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:54,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:54,983 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 15:18:54,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:18:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:54,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867848488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:54,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:54,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:18:54,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137893840] [2021-06-05 15:18:54,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:18:54,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:54,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:18:54,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:18:54,992 INFO L87 Difference]: Start difference. First operand 3857 states and 7631 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:55,805 INFO L93 Difference]: Finished difference Result 5973 states and 11891 transitions. [2021-06-05 15:18:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:18:55,806 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:18:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:55,811 INFO L225 Difference]: With dead ends: 5973 [2021-06-05 15:18:55,811 INFO L226 Difference]: Without dead ends: 5944 [2021-06-05 15:18:55,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1047.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:18:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-06-05 15:18:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 3896. [2021-06-05 15:18:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3895 states have (on average 1.9802310654685493) internal successors, (7713), 3895 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 7713 transitions. [2021-06-05 15:18:55,851 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 7713 transitions. Word has length 41 [2021-06-05 15:18:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:55,851 INFO L482 AbstractCegarLoop]: Abstraction has 3896 states and 7713 transitions. [2021-06-05 15:18:55,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 7713 transitions. [2021-06-05 15:18:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:55,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:55,854 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:56,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 15:18:56,055 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash -862044258, now seen corresponding path program 157 times [2021-06-05 15:18:56,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:56,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087671765] [2021-06-05 15:18:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:56,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:56,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087671765] [2021-06-05 15:18:56,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087671765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:56,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17996673] [2021-06-05 15:18:56,428 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 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 15:18:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:56,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:18:56,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:57,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:57,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:57,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:57,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:57,138 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 108 treesize of output 44 [2021-06-05 15:18:57,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:57,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:57,147 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 15:18:57,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:18:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:57,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17996673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:57,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:57,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 15:18:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391402834] [2021-06-05 15:18:57,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:18:57,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:18:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:18:57,156 INFO L87 Difference]: Start difference. First operand 3896 states and 7713 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:18:57,803 INFO L93 Difference]: Finished difference Result 6364 states and 12786 transitions. [2021-06-05 15:18:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:18:57,803 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:18:57,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:18:57,809 INFO L225 Difference]: With dead ends: 6364 [2021-06-05 15:18:57,809 INFO L226 Difference]: Without dead ends: 6297 [2021-06-05 15:18:57,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1057.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:18:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6297 states. [2021-06-05 15:18:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6297 to 3182. [2021-06-05 15:18:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 1.994970135177617) internal successors, (6346), 3181 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 6346 transitions. [2021-06-05 15:18:57,848 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 6346 transitions. Word has length 41 [2021-06-05 15:18:57,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:18:57,848 INFO L482 AbstractCegarLoop]: Abstraction has 3182 states and 6346 transitions. [2021-06-05 15:18:57,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:18:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 6346 transitions. [2021-06-05 15:18:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:18:57,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:18:57,850 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:18:58,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:18:58,051 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:18:58,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:18:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1224691750, now seen corresponding path program 158 times [2021-06-05 15:18:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:18:58,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035869188] [2021-06-05 15:18:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:18:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:18:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:58,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:18:58,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035869188] [2021-06-05 15:18:58,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035869188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:58,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260065732] [2021-06-05 15:18:58,382 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 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 15:18:58,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:18:58,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:18:58,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:18:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:18:59,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:18:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:18:59,127 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 108 treesize of output 44 [2021-06-05 15:18:59,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:18:59,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:18:59,136 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 15:18:59,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:18:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:18:59,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260065732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:18:59,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:18:59,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:18:59,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407561171] [2021-06-05 15:18:59,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:18:59,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:18:59,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:18:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:18:59,145 INFO L87 Difference]: Start difference. First operand 3182 states and 6346 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:00,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:00,146 INFO L93 Difference]: Finished difference Result 5735 states and 11591 transitions. [2021-06-05 15:19:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:19:00,147 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:00,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:00,154 INFO L225 Difference]: With dead ends: 5735 [2021-06-05 15:19:00,154 INFO L226 Difference]: Without dead ends: 5632 [2021-06-05 15:19:00,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1069.4ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:19:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2021-06-05 15:19:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 2936. [2021-06-05 15:19:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 2.005792163543441) internal successors, (5887), 2935 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 5887 transitions. [2021-06-05 15:19:00,212 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 5887 transitions. Word has length 41 [2021-06-05 15:19:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:00,212 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 5887 transitions. [2021-06-05 15:19:00,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 5887 transitions. [2021-06-05 15:19:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:00,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:00,214 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:00,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:00,415 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:00,415 INFO L82 PathProgramCache]: Analyzing trace with hash -331915042, now seen corresponding path program 159 times [2021-06-05 15:19:00,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:00,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948643825] [2021-06-05 15:19:00,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:00,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:00,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948643825] [2021-06-05 15:19:00,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948643825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:00,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198768523] [2021-06-05 15:19:00,741 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 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 15:19:00,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:19:00,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:00,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-05 15:19:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:01,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:01,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:01,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:01,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:01,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:01,709 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 106 treesize of output 44 [2021-06-05 15:19:01,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:01,726 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 15:19:01,727 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 15:19:01,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:12 [2021-06-05 15:19:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:01,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198768523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:01,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:01,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:19:01,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263948982] [2021-06-05 15:19:01,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:19:01,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:01,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:19:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:01,737 INFO L87 Difference]: Start difference. First operand 2936 states and 5887 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:04,217 INFO L93 Difference]: Finished difference Result 5251 states and 10563 transitions. [2021-06-05 15:19:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:19:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:04,222 INFO L225 Difference]: With dead ends: 5251 [2021-06-05 15:19:04,222 INFO L226 Difference]: Without dead ends: 5054 [2021-06-05 15:19:04,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2270.3ms TimeCoverageRelationStatistics Valid=269, Invalid=3763, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:19:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-06-05 15:19:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 3113. [2021-06-05 15:19:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 1.9983933161953729) internal successors, (6219), 3112 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 6219 transitions. [2021-06-05 15:19:04,255 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 6219 transitions. Word has length 41 [2021-06-05 15:19:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:04,255 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 6219 transitions. [2021-06-05 15:19:04,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 6219 transitions. [2021-06-05 15:19:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:04,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:04,257 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:04,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:04,458 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:04,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash 199723986, now seen corresponding path program 160 times [2021-06-05 15:19:04,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:04,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693982601] [2021-06-05 15:19:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:04,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:04,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693982601] [2021-06-05 15:19:04,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693982601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:04,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684242946] [2021-06-05 15:19:04,793 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 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 15:19:04,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:04,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:04,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:04,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:05,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:05,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:05,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:05,498 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 108 treesize of output 44 [2021-06-05 15:19:05,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:05,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:05,507 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 15:19:05,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684242946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:05,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:05,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 15:19:05,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651549513] [2021-06-05 15:19:05,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:19:05,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:05,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:19:05,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:19:05,516 INFO L87 Difference]: Start difference. First operand 3113 states and 6219 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:06,281 INFO L93 Difference]: Finished difference Result 5901 states and 11893 transitions. [2021-06-05 15:19:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:19:06,282 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:06,287 INFO L225 Difference]: With dead ends: 5901 [2021-06-05 15:19:06,287 INFO L226 Difference]: Without dead ends: 5804 [2021-06-05 15:19:06,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1024.5ms TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:19:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-06-05 15:19:06,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 3365. [2021-06-05 15:19:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 1.9913793103448276) internal successors, (6699), 3364 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 6699 transitions. [2021-06-05 15:19:06,324 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 6699 transitions. Word has length 41 [2021-06-05 15:19:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:06,324 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 6699 transitions. [2021-06-05 15:19:06,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 6699 transitions. [2021-06-05 15:19:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:06,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:06,340 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:06,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:06,541 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:06,542 INFO L82 PathProgramCache]: Analyzing trace with hash -273135364, now seen corresponding path program 161 times [2021-06-05 15:19:06,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:06,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410509182] [2021-06-05 15:19:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:06,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410509182] [2021-06-05 15:19:06,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410509182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:06,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399533399] [2021-06-05 15:19:06,911 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 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 15:19:06,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:19:06,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:06,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:06,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:08,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:08,501 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 76 treesize of output 36 [2021-06-05 15:19:08,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:08,518 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-05 15:19:08,519 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 15:19:08,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:99, output treesize:9 [2021-06-05 15:19:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:08,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399533399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:08,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:08,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-05 15:19:08,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708336679] [2021-06-05 15:19:08,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 15:19:08,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 15:19:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:19:08,544 INFO L87 Difference]: Start difference. First operand 3365 states and 6699 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:15,222 INFO L93 Difference]: Finished difference Result 6066 states and 12161 transitions. [2021-06-05 15:19:15,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:19:15,222 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 15:19:15,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:15,227 INFO L225 Difference]: With dead ends: 6066 [2021-06-05 15:19:15,227 INFO L226 Difference]: Without dead ends: 5834 [2021-06-05 15:19:15,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 4149.8ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:19:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-06-05 15:19:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 3467. [2021-06-05 15:19:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-06-05 15:19:15,265 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-06-05 15:19:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:15,265 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-06-05 15:19:15,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-06-05 15:19:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:15,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:15,268 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:15,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 15:19:15,468 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:15,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1829742156, now seen corresponding path program 162 times [2021-06-05 15:19:15,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:15,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101050963] [2021-06-05 15:19:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:15,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:15,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101050963] [2021-06-05 15:19:15,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101050963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:15,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392649498] [2021-06-05 15:19:15,888 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 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 15:19:15,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:19:15,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:15,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:15,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:16,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:16,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:16,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:16,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:16,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:16,713 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 108 treesize of output 44 [2021-06-05 15:19:16,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:16,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:16,721 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 15:19:16,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:16,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392649498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:16,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:16,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:19:16,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371839514] [2021-06-05 15:19:16,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:19:16,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:16,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:19:16,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:16,731 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:17,851 INFO L93 Difference]: Finished difference Result 5352 states and 10712 transitions. [2021-06-05 15:19:17,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:19:17,851 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:17,856 INFO L225 Difference]: With dead ends: 5352 [2021-06-05 15:19:17,856 INFO L226 Difference]: Without dead ends: 5323 [2021-06-05 15:19:17,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1209.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:19:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2021-06-05 15:19:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 3467. [2021-06-05 15:19:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-06-05 15:19:17,892 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-06-05 15:19:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:17,892 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-06-05 15:19:17,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-06-05 15:19:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:17,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:17,895 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:18,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 15:19:18,095 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:18,095 INFO L82 PathProgramCache]: Analyzing trace with hash -981044130, now seen corresponding path program 163 times [2021-06-05 15:19:18,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:18,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741429973] [2021-06-05 15:19:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:18,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:18,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741429973] [2021-06-05 15:19:18,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741429973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:18,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15496251] [2021-06-05 15:19:18,426 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 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 15:19:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:18,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:19,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:19,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:19,192 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 108 treesize of output 44 [2021-06-05 15:19:19,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:19,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:19,202 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 15:19:19,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:19,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15496251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:19,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:19,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:19:19,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758088980] [2021-06-05 15:19:19,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:19:19,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:19:19,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:19,211 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:20,102 INFO L93 Difference]: Finished difference Result 5320 states and 10648 transitions. [2021-06-05 15:19:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:19:20,102 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:20,107 INFO L225 Difference]: With dead ends: 5320 [2021-06-05 15:19:20,108 INFO L226 Difference]: Without dead ends: 5289 [2021-06-05 15:19:20,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1088.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:19:20,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2021-06-05 15:19:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 3506. [2021-06-05 15:19:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.9905848787446505) internal successors, (6977), 3505 states have internal predecessors, (6977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 6977 transitions. [2021-06-05 15:19:20,144 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 6977 transitions. Word has length 41 [2021-06-05 15:19:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:20,144 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 6977 transitions. [2021-06-05 15:19:20,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 6977 transitions. [2021-06-05 15:19:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:20,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:20,147 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:20,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:20,349 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1879697322, now seen corresponding path program 164 times [2021-06-05 15:19:20,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:20,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143307726] [2021-06-05 15:19:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:20,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:20,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143307726] [2021-06-05 15:19:20,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143307726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:20,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385965835] [2021-06-05 15:19:20,669 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 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 15:19:20,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:20,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:20,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:20,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:21,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:21,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:21,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:21,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:21,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:21,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:21,372 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 108 treesize of output 44 [2021-06-05 15:19:21,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:21,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:21,380 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 15:19:21,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:21,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385965835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:21,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:21,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-05 15:19:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124075767] [2021-06-05 15:19:21,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:19:21,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:21,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:19:21,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:19:21,390 INFO L87 Difference]: Start difference. First operand 3506 states and 6977 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:22,334 INFO L93 Difference]: Finished difference Result 6035 states and 12259 transitions. [2021-06-05 15:19:22,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:19:22,334 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:22,339 INFO L225 Difference]: With dead ends: 6035 [2021-06-05 15:19:22,339 INFO L226 Difference]: Without dead ends: 5929 [2021-06-05 15:19:22,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1030.7ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:19:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2021-06-05 15:19:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 3122. [2021-06-05 15:19:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 1.993912207625761) internal successors, (6223), 3121 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 6223 transitions. [2021-06-05 15:19:22,385 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 6223 transitions. Word has length 41 [2021-06-05 15:19:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:22,385 INFO L482 AbstractCegarLoop]: Abstraction has 3122 states and 6223 transitions. [2021-06-05 15:19:22,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 6223 transitions. [2021-06-05 15:19:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:22,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:22,387 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:22,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 15:19:22,587 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash 207038686, now seen corresponding path program 165 times [2021-06-05 15:19:22,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:22,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807084007] [2021-06-05 15:19:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:22,920 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:22,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:22,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807084007] [2021-06-05 15:19:22,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807084007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:22,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91530832] [2021-06-05 15:19:22,921 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 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 15:19:22,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:19:22,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:22,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:23,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:23,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:23,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:23,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:23,655 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 108 treesize of output 44 [2021-06-05 15:19:23,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:23,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:23,663 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 15:19:23,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:23,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91530832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:23,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:23,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:19:23,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805578153] [2021-06-05 15:19:23,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:19:23,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:23,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:19:23,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:23,673 INFO L87 Difference]: Start difference. First operand 3122 states and 6223 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:24,409 INFO L93 Difference]: Finished difference Result 5436 states and 11008 transitions. [2021-06-05 15:19:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:19:24,409 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:24,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:24,413 INFO L225 Difference]: With dead ends: 5436 [2021-06-05 15:19:24,413 INFO L226 Difference]: Without dead ends: 5333 [2021-06-05 15:19:24,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1101.6ms TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:19:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5333 states. [2021-06-05 15:19:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5333 to 2879. [2021-06-05 15:19:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-06-05 15:19:24,444 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-06-05 15:19:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:24,444 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-06-05 15:19:24,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-06-05 15:19:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:24,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:24,446 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:24,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:24,647 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1349568106, now seen corresponding path program 166 times [2021-06-05 15:19:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:24,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037554081] [2021-06-05 15:19:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:24,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:24,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037554081] [2021-06-05 15:19:24,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037554081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:24,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654585815] [2021-06-05 15:19:24,984 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 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 15:19:25,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:25,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:25,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:25,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:25,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:25,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:25,718 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 108 treesize of output 44 [2021-06-05 15:19:25,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:25,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:25,730 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 15:19:25,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:25,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654585815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:25,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:25,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:19:25,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359196309] [2021-06-05 15:19:25,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:19:25,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:19:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:25,743 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:26,707 INFO L93 Difference]: Finished difference Result 4690 states and 9451 transitions. [2021-06-05 15:19:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:19:26,708 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:26,711 INFO L225 Difference]: With dead ends: 4690 [2021-06-05 15:19:26,712 INFO L226 Difference]: Without dead ends: 4661 [2021-06-05 15:19:26,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:19:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-05 15:19:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2879. [2021-06-05 15:19:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-06-05 15:19:26,740 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-06-05 15:19:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:26,741 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-06-05 15:19:26,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-06-05 15:19:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:26,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:26,743 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:26,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 15:19:26,943 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash 301499944, now seen corresponding path program 167 times [2021-06-05 15:19:26,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:26,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681344796] [2021-06-05 15:19:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:27,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681344796] [2021-06-05 15:19:27,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681344796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:27,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275890529] [2021-06-05 15:19:27,273 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 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 15:19:27,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:19:27,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:27,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:27,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:28,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:28,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:28,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:28,092 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 36 [2021-06-05 15:19:28,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:28,106 INFO L628 ElimStorePlain]: treesize reduction 5, result has 82.8 percent of original size [2021-06-05 15:19:28,107 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 15:19:28,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:98, output treesize:9 [2021-06-05 15:19:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:28,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275890529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:28,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:28,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-06-05 15:19:28,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713536047] [2021-06-05 15:19:28,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:19:28,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:28,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:19:28,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:19:28,130 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:29,207 INFO L93 Difference]: Finished difference Result 5671 states and 11398 transitions. [2021-06-05 15:19:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:19:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 15:19:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:29,212 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 15:19:29,212 INFO L226 Difference]: Without dead ends: 5413 [2021-06-05 15:19:29,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1260.1ms TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:19:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-05 15:19:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 3262. [2021-06-05 15:19:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 1.9908003679852806) internal successors, (6492), 3261 states have internal predecessors, (6492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 6492 transitions. [2021-06-05 15:19:29,247 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 6492 transitions. Word has length 41 [2021-06-05 15:19:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:29,247 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 6492 transitions. [2021-06-05 15:19:29,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 6492 transitions. [2021-06-05 15:19:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:29,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:29,249 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:29,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:29,450 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:29,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1290788428, now seen corresponding path program 168 times [2021-06-05 15:19:29,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:29,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382537418] [2021-06-05 15:19:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:29,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:29,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382537418] [2021-06-05 15:19:29,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382537418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:29,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33305262] [2021-06-05 15:19:29,866 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 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 15:19:29,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:19:29,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:29,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:29,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:30,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:30,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:30,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:30,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:30,621 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 108 treesize of output 44 [2021-06-05 15:19:30,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:30,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:30,630 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 15:19:30,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:30,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33305262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:30,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:30,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:19:30,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165760361] [2021-06-05 15:19:30,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:19:30,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:30,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:19:30,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:30,639 INFO L87 Difference]: Start difference. First operand 3262 states and 6492 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:31,257 INFO L93 Difference]: Finished difference Result 6007 states and 12122 transitions. [2021-06-05 15:19:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:19:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:31,262 INFO L225 Difference]: With dead ends: 6007 [2021-06-05 15:19:31,262 INFO L226 Difference]: Without dead ends: 5784 [2021-06-05 15:19:31,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1205.5ms TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:19:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5784 states. [2021-06-05 15:19:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 2866. [2021-06-05 15:19:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 1.9720767888307156) internal successors, (5650), 2865 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 5650 transitions. [2021-06-05 15:19:31,296 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 5650 transitions. Word has length 41 [2021-06-05 15:19:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:31,296 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 5650 transitions. [2021-06-05 15:19:31,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 5650 transitions. [2021-06-05 15:19:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:31,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:31,298 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:31,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:31,499 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:31,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1447572076, now seen corresponding path program 169 times [2021-06-05 15:19:31,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:31,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009807725] [2021-06-05 15:19:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:31,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:31,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009807725] [2021-06-05 15:19:31,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009807725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:31,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411945230] [2021-06-05 15:19:31,943 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:31,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:31,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:32,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:32,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:32,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:32,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:32,703 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 108 treesize of output 44 [2021-06-05 15:19:32,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:32,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:32,712 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 15:19:32,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:32,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411945230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:32,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:32,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:19:32,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482049281] [2021-06-05 15:19:32,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:19:32,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:32,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:19:32,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:32,721 INFO L87 Difference]: Start difference. First operand 2866 states and 5650 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:33,547 INFO L93 Difference]: Finished difference Result 4555 states and 9072 transitions. [2021-06-05 15:19:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:19:33,548 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:33,553 INFO L225 Difference]: With dead ends: 4555 [2021-06-05 15:19:33,553 INFO L226 Difference]: Without dead ends: 4532 [2021-06-05 15:19:33,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1180.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:19:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-06-05 15:19:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 2872. [2021-06-05 15:19:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:33,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-06-05 15:19:33,590 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-06-05 15:19:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:33,590 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-06-05 15:19:33,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-06-05 15:19:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:33,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:33,593 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:33,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:33,815 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:33,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1998697194, now seen corresponding path program 170 times [2021-06-05 15:19:33,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:33,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823104040] [2021-06-05 15:19:33,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:34,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:34,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823104040] [2021-06-05 15:19:34,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823104040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:34,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589888288] [2021-06-05 15:19:34,259 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:34,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:34,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:34,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:19:34,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:35,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:35,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:35,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:19:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:19:35,026 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 108 treesize of output 44 [2021-06-05 15:19:35,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:19:35,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:19:35,035 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 15:19:35,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-05 15:19:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:35,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589888288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:35,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:35,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 15:19:35,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430682545] [2021-06-05 15:19:35,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:19:35,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:35,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:19:35,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:35,044 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:35,802 INFO L93 Difference]: Finished difference Result 4567 states and 9099 transitions. [2021-06-05 15:19:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:19:35,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 15:19:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:35,806 INFO L225 Difference]: With dead ends: 4567 [2021-06-05 15:19:35,807 INFO L226 Difference]: Without dead ends: 4543 [2021-06-05 15:19:35,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1173.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:19:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-06-05 15:19:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 2872. [2021-06-05 15:19:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-06-05 15:19:35,834 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-06-05 15:19:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:35,834 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-06-05 15:19:35,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-06-05 15:19:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:19:35,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:35,836 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:36,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:36,037 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1053452280, now seen corresponding path program 171 times [2021-06-05 15:19:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:36,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230114209] [2021-06-05 15:19:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:36,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230114209] [2021-06-05 15:19:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230114209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676596915] [2021-06-05 15:19:36,361 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:36,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:19:36,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:36,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 15:19:36,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:19,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:20:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:20:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:20:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:20:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:20:19,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:20:19,172 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 96 treesize of output 44 [2021-06-05 15:20:19,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:20:19,200 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 15:20:19,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:20:19,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:12 [2021-06-05 15:20:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:19,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676596915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:19,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:19,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-06-05 15:20:19,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357115217] [2021-06-05 15:20:19,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:20:19,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:20:19,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1080, Unknown=12, NotChecked=0, Total=1190 [2021-06-05 15:20:19,211 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:40,037 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-05 15:22:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:22:40,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:40,239 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:860) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:774) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-06-05 15:22:40,244 INFO L168 Benchmark]: Toolchain (without parser) took 451321.69 ms. Allocated memory was 358.6 MB in the beginning and 750.8 MB in the end (delta: 392.2 MB). Free memory was 337.3 MB in the beginning and 480.6 MB in the end (delta: -143.2 MB). Peak memory consumption was 250.4 MB. Max. memory is 16.0 GB. [2021-06-05 15:22:40,245 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory was 338.5 MB in the beginning and 338.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:22:40,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.20 ms. Allocated memory is still 358.6 MB. Free memory was 337.3 MB in the beginning and 335.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:22:40,245 INFO L168 Benchmark]: Boogie Preprocessor took 11.63 ms. Allocated memory is still 358.6 MB. Free memory was 335.9 MB in the beginning and 334.9 MB in the end (delta: 979.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:22:40,245 INFO L168 Benchmark]: RCFGBuilder took 309.53 ms. Allocated memory is still 358.6 MB. Free memory was 334.9 MB in the beginning and 322.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 15:22:40,245 INFO L168 Benchmark]: TraceAbstraction took 450975.87 ms. Allocated memory was 358.6 MB in the beginning and 750.8 MB in the end (delta: 392.2 MB). Free memory was 322.2 MB in the beginning and 480.6 MB in the end (delta: -158.4 MB). Peak memory consumption was 235.8 MB. Max. memory is 16.0 GB. [2021-06-05 15:22:40,245 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 358.6 MB. Free memory was 338.5 MB in the beginning and 338.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.20 ms. Allocated memory is still 358.6 MB. Free memory was 337.3 MB in the beginning and 335.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.63 ms. Allocated memory is still 358.6 MB. Free memory was 335.9 MB in the beginning and 334.9 MB in the end (delta: 979.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 309.53 ms. Allocated memory is still 358.6 MB. Free memory was 334.9 MB in the beginning and 322.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 450975.87 ms. Allocated memory was 358.6 MB in the beginning and 750.8 MB in the end (delta: 392.2 MB). Free memory was 322.2 MB in the beginning and 480.6 MB in the end (delta: -158.4 MB). Peak memory consumption was 235.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...