/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:41:51,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:41:51,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:41:51,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:41:51,906 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:41:51,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:41:51,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:41:51,934 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:41:51,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:41:51,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:41:51,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:41:51,936 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:41:51,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:41:51,936 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:41:51,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:41:51,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:41:51,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:41:51,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:41:51,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:41:51,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:41:51,937 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:41:51,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:41:51,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:41:51,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:41:51,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:41:51,939 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:41:51,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:41:51,939 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:41:52,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:41:52,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:41:52,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:41:52,200 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:41:52,200 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:41:52,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-06-05 23:41:52,201 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-06-05 23:41:52,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:41:52,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:41:52,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:41:52,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:41:52,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:41:52,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:41:52,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:41:52,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:41:52,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:41:52,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... [2021-06-05 23:41:52,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:41:52,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:41:52,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:41:52,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:41:52,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:41:52,339 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:41:52,339 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:41:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:41:52,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:41:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:41:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:41:52,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:41:52,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:41:52,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:41:52,340 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:41:52,341 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:41:52,341 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:41:52,342 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 23:41:52,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 23:41:52,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 23:41:52,342 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:41:52,535 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:41:52,535 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:41:52,536 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:41:52 BoogieIcfgContainer [2021-06-05 23:41:52,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:41:52,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:41:52,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:41:52,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:41:52,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:41:52" (1/2) ... [2021-06-05 23:41:52,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4e8314 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:41:52, skipping insertion in model container [2021-06-05 23:41:52,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:41:52" (2/2) ... [2021-06-05 23:41:52,541 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-06-05 23:41:52,544 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:41:52,545 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:41:52,545 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:41:52,545 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:41:52,603 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 23:41:52,616 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 23:41:52,627 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:41:52,628 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:41:52,628 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:41:52,628 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:41:52,628 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:41:52,628 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:41:52,628 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:41:52,628 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:41:52,645 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 23:41:52,679 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:41:52,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:52,713 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:52,714 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-06-05 23:41:52,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:52,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142604200] [2021-06-05 23:41:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:52,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:52,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142604200] [2021-06-05 23:41:52,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142604200] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:41:52,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:41:52,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:41:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101609532] [2021-06-05 23:41:52,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:41:52,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:41:52,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:41:52,898 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:52,946 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-06-05 23:41:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:41:52,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:41:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:52,973 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 23:41:52,973 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 23:41:52,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:41:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 23:41:53,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-06-05 23:41:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-06-05 23:41:53,065 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-06-05 23:41:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:53,066 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-06-05 23:41:53,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-06-05 23:41:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:41:53,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:53,071 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:53,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:41:53,072 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-06-05 23:41:53,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192497558] [2021-06-05 23:41:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:53,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:53,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192497558] [2021-06-05 23:41:53,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192497558] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:41:53,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:41:53,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:41:53,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426921198] [2021-06-05 23:41:53,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:41:53,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:41:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:41:53,153 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:41:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:53,206 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-06-05 23:41:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:41:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:41:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:53,215 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 23:41:53,216 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 23:41:53,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:41:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 23:41:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-06-05 23:41:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-06-05 23:41:53,257 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-06-05 23:41:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:53,257 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-06-05 23:41:53,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:41:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-06-05 23:41:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:41:53,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:53,262 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:53,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:41:53,263 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-06-05 23:41:53,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:53,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935375703] [2021-06-05 23:41:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:53,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:53,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935375703] [2021-06-05 23:41:53,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935375703] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:41:53,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:41:53,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:41:53,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217624983] [2021-06-05 23:41:53,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:41:53,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:53,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:41:53,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:41:53,323 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:41:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:53,365 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-06-05 23:41:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:41:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:41:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:53,379 INFO L225 Difference]: With dead ends: 2017 [2021-06-05 23:41:53,379 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 23:41:53,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:41:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 23:41:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-06-05 23:41:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-06-05 23:41:53,427 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-06-05 23:41:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:53,428 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-06-05 23:41:53,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23:41:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-06-05 23:41:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:41:53,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:53,434 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:53,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:41:53,434 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:53,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:53,435 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-06-05 23:41:53,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:53,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701283496] [2021-06-05 23:41:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:53,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:53,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701283496] [2021-06-05 23:41:53,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701283496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:53,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019131230] [2021-06-05 23:41:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:53,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:41:53,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:53,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019131230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:53,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:53,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 23:41:53,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008668066] [2021-06-05 23:41:53,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:41:53,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:53,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:41:53,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:41:53,671 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 23:41:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:53,777 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-06-05 23:41:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:41:53,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:41:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:53,786 INFO L225 Difference]: With dead ends: 2308 [2021-06-05 23:41:53,786 INFO L226 Difference]: Without dead ends: 2108 [2021-06-05 23:41:53,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:41:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-05 23:41:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-06-05 23:41:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-06-05 23:41:53,831 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-06-05 23:41:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:53,831 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-06-05 23:41:53,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 23:41:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-06-05 23:41:53,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:41:53,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:53,835 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:54,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:54,049 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1080968406, now seen corresponding path program 1 times [2021-06-05 23:41:54,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:54,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028760533] [2021-06-05 23:41:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:54,068 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 23:41:54,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:54,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028760533] [2021-06-05 23:41:54,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028760533] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:41:54,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:41:54,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:41:54,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630215744] [2021-06-05 23:41:54,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:41:54,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:54,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:41:54,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:41:54,069 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:54,138 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-06-05 23:41:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:41:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:41:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:54,146 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 23:41:54,147 INFO L226 Difference]: Without dead ends: 1860 [2021-06-05 23:41:54,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:41:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-05 23:41:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-06-05 23:41:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-06-05 23:41:54,185 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-06-05 23:41:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:54,185 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-06-05 23:41:54,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-06-05 23:41:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:41:54,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:54,188 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:54,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:41:54,189 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:54,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1489193046, now seen corresponding path program 2 times [2021-06-05 23:41:54,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:54,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702497492] [2021-06-05 23:41:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:54,222 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 23:41:54,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:54,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702497492] [2021-06-05 23:41:54,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702497492] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:41:54,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:41:54,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:41:54,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561631098] [2021-06-05 23:41:54,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:41:54,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:54,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:41:54,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:41:54,225 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:54,276 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-06-05 23:41:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:41:54,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:41:54,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:54,282 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 23:41:54,282 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 23:41:54,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:41:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 23:41:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-06-05 23:41:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-06-05 23:41:54,312 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-06-05 23:41:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:54,312 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-06-05 23:41:54,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-06-05 23:41:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:41:54,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:54,315 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 23:41:54,315 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-06-05 23:41:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:54,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636270590] [2021-06-05 23:41:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:54,361 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 23:41:54,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:54,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636270590] [2021-06-05 23:41:54,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636270590] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:41:54,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:41:54,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:41:54,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684383209] [2021-06-05 23:41:54,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:41:54,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:41:54,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:41:54,363 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:54,400 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-06-05 23:41:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:41:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:41:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:54,405 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 23:41:54,406 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 23:41:54,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:41:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 23:41:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-06-05 23:41:54,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-06-05 23:41:54,467 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-06-05 23:41:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:54,468 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-06-05 23:41:54,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-06-05 23:41:54,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:41:54,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:54,477 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:54,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 23:41:54,486 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:54,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1861969590, now seen corresponding path program 1 times [2021-06-05 23:41:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:54,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243539937] [2021-06-05 23:41:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:41:54,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243539937] [2021-06-05 23:41:54,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243539937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:54,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335170875] [2021-06-05 23:41:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:54,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 23:41:54,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:41:54,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335170875] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:41:54,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:41:54,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 23:41:54,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114721993] [2021-06-05 23:41:54,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:41:54,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:54,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:41:54,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:41:54,646 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 23:41:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:54,670 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-06-05 23:41:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:41:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-06-05 23:41:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:54,677 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 23:41:54,677 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 23:41:54,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:41:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 23:41:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-06-05 23:41:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-06-05 23:41:54,698 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-06-05 23:41:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:54,699 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-06-05 23:41:54,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 23:41:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-06-05 23:41:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:41:54,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:54,703 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:54,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:54,909 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1282023498, now seen corresponding path program 1 times [2021-06-05 23:41:54,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:54,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896048892] [2021-06-05 23:41:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:54,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:54,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896048892] [2021-06-05 23:41:54,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896048892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:54,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360863840] [2021-06-05 23:41:54,925 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 23:41:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:54,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 23:41:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:55,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360863840] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:41:55,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 23:41:55,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 23:41:55,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121311721] [2021-06-05 23:41:55,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:41:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:41:55,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:41:55,014 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 23:41:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:55,030 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-06-05 23:41:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:41:55,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-06-05 23:41:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:55,037 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 23:41:55,037 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 23:41:55,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:41:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 23:41:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-06-05 23:41:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-06-05 23:41:55,059 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-06-05 23:41:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:55,059 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-06-05 23:41:55,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 23:41:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-06-05 23:41:55,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:41:55,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:55,061 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:55,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:55,277 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:55,277 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 1 times [2021-06-05 23:41:55,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:55,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514756294] [2021-06-05 23:41:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:55,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514756294] [2021-06-05 23:41:55,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514756294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:55,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846811552] [2021-06-05 23:41:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:41:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:55,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:41:55,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:55,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:55,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:55,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-06-05 23:41:55,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 23:41:55,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:55,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:55,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:55,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-06-05 23:41:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:55,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846811552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:55,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:55,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:41:55,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453874118] [2021-06-05 23:41:55,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:41:55,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:55,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:41:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:41:55,637 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:55,797 INFO L93 Difference]: Finished difference Result 2449 states and 9125 transitions. [2021-06-05 23:41:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:41:55,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 29 [2021-06-05 23:41:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:55,806 INFO L225 Difference]: With dead ends: 2449 [2021-06-05 23:41:55,806 INFO L226 Difference]: Without dead ends: 2370 [2021-06-05 23:41:55,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:41:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-06-05 23:41:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1512. [2021-06-05 23:41:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.7068166776968896) internal successors, (5601), 1511 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5601 transitions. [2021-06-05 23:41:55,844 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5601 transitions. Word has length 29 [2021-06-05 23:41:55,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:55,844 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5601 transitions. [2021-06-05 23:41:55,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5601 transitions. [2021-06-05 23:41:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:41:55,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:55,848 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:56,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:56,065 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash -53868170, now seen corresponding path program 2 times [2021-06-05 23:41:56,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:56,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670980472] [2021-06-05 23:41:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:56,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:56,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670980472] [2021-06-05 23:41:56,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670980472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:56,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421830316] [2021-06-05 23:41:56,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:56,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:41:56,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:41:56,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:56,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 23:41:56,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:56,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 23:41:56,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 23:41:56,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:56,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 23:41:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421830316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:56,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:56,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:41:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963299147] [2021-06-05 23:41:56,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:41:56,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:41:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:41:56,344 INFO L87 Difference]: Start difference. First operand 1512 states and 5601 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:56,501 INFO L93 Difference]: Finished difference Result 2849 states and 10712 transitions. [2021-06-05 23:41:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:41:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:41:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:56,509 INFO L225 Difference]: With dead ends: 2849 [2021-06-05 23:41:56,509 INFO L226 Difference]: Without dead ends: 2770 [2021-06-05 23:41:56,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:41:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-06-05 23:41:56,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1711. [2021-06-05 23:41:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.7239766081871344) internal successors, (6368), 1710 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 6368 transitions. [2021-06-05 23:41:56,547 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 6368 transitions. Word has length 29 [2021-06-05 23:41:56,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:56,547 INFO L482 AbstractCegarLoop]: Abstraction has 1711 states and 6368 transitions. [2021-06-05 23:41:56,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 6368 transitions. [2021-06-05 23:41:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:41:56,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:56,551 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:56,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 23:41:56,765 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1931624520, now seen corresponding path program 3 times [2021-06-05 23:41:56,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:56,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860314507] [2021-06-05 23:41:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:56,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:56,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860314507] [2021-06-05 23:41:56,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860314507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:56,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597610169] [2021-06-05 23:41:56,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:56,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:41:56,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:41:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:56,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 23:41:56,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:56,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:56,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 23:41:56,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 23:41:56,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:57,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:57,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:57,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 23:41:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:57,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597610169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:57,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:57,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:41:57,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687027009] [2021-06-05 23:41:57,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:41:57,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:41:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:41:57,022 INFO L87 Difference]: Start difference. First operand 1711 states and 6368 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:57,164 INFO L93 Difference]: Finished difference Result 2677 states and 10034 transitions. [2021-06-05 23:41:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:41:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:41:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:57,171 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 23:41:57,171 INFO L226 Difference]: Without dead ends: 2598 [2021-06-05 23:41:57,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:41:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-05 23:41:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1837. [2021-06-05 23:41:57,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-06-05 23:41:57,221 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-06-05 23:41:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:57,221 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-06-05 23:41:57,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-06-05 23:41:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:41:57,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:57,225 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:57,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:57,445 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash 490207522, now seen corresponding path program 4 times [2021-06-05 23:41:57,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:57,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217567671] [2021-06-05 23:41:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:57,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:57,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217567671] [2021-06-05 23:41:57,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217567671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:57,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175693335] [2021-06-05 23:41:57,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:57,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:41:57,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:41:57,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 23:41:57,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:57,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:57,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:57,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 23:41:57,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 23:41:57,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:57,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:57,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:57,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 23:41:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:57,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175693335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:57,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:57,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:41:57,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209996901] [2021-06-05 23:41:57,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:41:57,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:57,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:41:57,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:41:57,708 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:57,914 INFO L93 Difference]: Finished difference Result 3111 states and 11725 transitions. [2021-06-05 23:41:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:41:57,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:41:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:57,925 INFO L225 Difference]: With dead ends: 3111 [2021-06-05 23:41:57,925 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 23:41:57,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:41:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 23:41:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2051. [2021-06-05 23:41:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-06-05 23:41:57,968 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-06-05 23:41:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:57,969 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-06-05 23:41:57,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-06-05 23:41:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:41:57,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:57,972 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:58,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:58,189 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:58,190 INFO L82 PathProgramCache]: Analyzing trace with hash -464930448, now seen corresponding path program 5 times [2021-06-05 23:41:58,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:58,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938983776] [2021-06-05 23:41:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:58,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:58,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938983776] [2021-06-05 23:41:58,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938983776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:58,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334571878] [2021-06-05 23:41:58,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:58,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:41:58,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:41:58,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:58,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 23:41:58,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:58,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:58,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:58,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-06-05 23:41:58,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 23:41:58,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:58,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:58,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:58,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-06-05 23:41:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:58,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334571878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:58,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:58,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:41:58,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101237938] [2021-06-05 23:41:58,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:41:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:58,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:41:58,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:41:58,439 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:58,636 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-06-05 23:41:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:41:58,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:41:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:58,644 INFO L225 Difference]: With dead ends: 2933 [2021-06-05 23:41:58,644 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 23:41:58,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:41:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 23:41:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-06-05 23:41:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-06-05 23:41:58,685 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-06-05 23:41:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:58,685 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-06-05 23:41:58,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-06-05 23:41:58,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:41:58,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:58,689 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:58,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 23:41:58,897 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1689459718, now seen corresponding path program 6 times [2021-06-05 23:41:58,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:58,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958238524] [2021-06-05 23:41:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:58,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:58,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958238524] [2021-06-05 23:41:58,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958238524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:58,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762576923] [2021-06-05 23:41:58,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:59,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:41:59,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:59,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:41:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:59,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 23:41:59,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:59,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:59,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:59,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 23:41:59,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 23:41:59,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:41:59,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:41:59,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:41:59,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-06-05 23:41:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:59,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762576923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:59,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:59,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 23:41:59,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881794205] [2021-06-05 23:41:59,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:41:59,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:59,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:41:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:41:59,123 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 23:41:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:59,293 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-06-05 23:41:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:41:59,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 29 [2021-06-05 23:41:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:59,300 INFO L225 Difference]: With dead ends: 2807 [2021-06-05 23:41:59,300 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 23:41:59,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:41:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 23:41:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-06-05 23:41:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-06-05 23:41:59,338 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-06-05 23:41:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:59,338 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-06-05 23:41:59,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 23:41:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-06-05 23:41:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:41:59,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:59,341 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:59,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:41:59,559 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:59,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1599438650, now seen corresponding path program 7 times [2021-06-05 23:41:59,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:59,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155367176] [2021-06-05 23:41:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:59,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:59,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155367176] [2021-06-05 23:41:59,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155367176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:59,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292403929] [2021-06-05 23:41:59,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:41:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:41:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:41:59,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292403929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:59,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:41:59,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 23:41:59,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187439066] [2021-06-05 23:41:59,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:41:59,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:41:59,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:41:59,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:41:59,663 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:59,725 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-06-05 23:41:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:41:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 23:41:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:59,733 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 23:41:59,733 INFO L226 Difference]: Without dead ends: 3242 [2021-06-05 23:41:59,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:41:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-05 23:41:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-06-05 23:41:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-06-05 23:41:59,781 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-06-05 23:41:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:59,781 INFO L482 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-06-05 23:41:59,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-06-05 23:41:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:41:59,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:59,786 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:00,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:42:00,005 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:00,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:00,005 INFO L82 PathProgramCache]: Analyzing trace with hash 415909830, now seen corresponding path program 8 times [2021-06-05 23:42:00,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:00,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464544249] [2021-06-05 23:42:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:00,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:00,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464544249] [2021-06-05 23:42:00,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464544249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:00,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878143829] [2021-06-05 23:42:00,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:00,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:00,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:42:00,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:00,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878143829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:00,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:00,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 23:42:00,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739738256] [2021-06-05 23:42:00,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:42:00,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:42:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:42:00,107 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:00,189 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-06-05 23:42:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:42:00,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 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 31 [2021-06-05 23:42:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:00,199 INFO L225 Difference]: With dead ends: 5257 [2021-06-05 23:42:00,199 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 23:42:00,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:42:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 23:42:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-06-05 23:42:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-06-05 23:42:00,280 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-06-05 23:42:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:00,280 INFO L482 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-06-05 23:42:00,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-06-05 23:42:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:00,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:00,288 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:00,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:42:00,501 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:00,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1135351718, now seen corresponding path program 9 times [2021-06-05 23:42:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:00,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995795761] [2021-06-05 23:42:00,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:00,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:00,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995795761] [2021-06-05 23:42:00,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995795761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:00,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472472346] [2021-06-05 23:42:00,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:00,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:42:00,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472472346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:00,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:00,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 23:42:00,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171495812] [2021-06-05 23:42:00,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:42:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:42:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:42:00,632 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:00,966 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-06-05 23:42:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:42:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 34 [2021-06-05 23:42:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:00,995 INFO L225 Difference]: With dead ends: 16323 [2021-06-05 23:42:00,995 INFO L226 Difference]: Without dead ends: 13965 [2021-06-05 23:42:00,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:42:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-06-05 23:42:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-06-05 23:42:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-06-05 23:42:01,205 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-06-05 23:42:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:01,206 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-06-05 23:42:01,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-06-05 23:42:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:01,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:01,220 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:01,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 23:42:01,433 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1002610221, now seen corresponding path program 10 times [2021-06-05 23:42:01,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:01,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383951920] [2021-06-05 23:42:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:01,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:01,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383951920] [2021-06-05 23:42:01,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383951920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:01,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822709855] [2021-06-05 23:42:01,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:01,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:01,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:01,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822709855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:01,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:01,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 23:42:01,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357909804] [2021-06-05 23:42:01,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:42:01,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:01,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:42:01,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:42:01,574 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:01,903 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-06-05 23:42:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:42:01,903 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:42:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:01,947 INFO L225 Difference]: With dead ends: 18970 [2021-06-05 23:42:01,947 INFO L226 Difference]: Without dead ends: 18531 [2021-06-05 23:42:01,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:42:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-06-05 23:42:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-06-05 23:42:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-06-05 23:42:02,284 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-06-05 23:42:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:02,284 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-06-05 23:42:02,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-06-05 23:42:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:02,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:02,305 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:02,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:02,521 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash 614978514, now seen corresponding path program 11 times [2021-06-05 23:42:02,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:02,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613806708] [2021-06-05 23:42:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:02,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:02,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613806708] [2021-06-05 23:42:02,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613806708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:02,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054517385] [2021-06-05 23:42:02,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:02,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:42:02,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:02,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:02,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054517385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:02,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:02,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:02,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254039812] [2021-06-05 23:42:02,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:02,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:02,731 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:03,003 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-06-05 23:42:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:42:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2021-06-05 23:42:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:03,042 INFO L225 Difference]: With dead ends: 18432 [2021-06-05 23:42:03,042 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 23:42:03,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:42:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 23:42:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-06-05 23:42:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-06-05 23:42:03,355 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-06-05 23:42:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:03,355 INFO L482 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-06-05 23:42:03,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:03,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-06-05 23:42:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:03,374 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:03,374 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:03,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:03,575 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:03,575 INFO L82 PathProgramCache]: Analyzing trace with hash 307309967, now seen corresponding path program 12 times [2021-06-05 23:42:03,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:03,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091724237] [2021-06-05 23:42:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:42:03,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:03,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091724237] [2021-06-05 23:42:03,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091724237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:03,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731243260] [2021-06-05 23:42:03,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:03,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:03,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:03,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:03,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:42:03,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731243260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:03,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:03,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:03,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143770502] [2021-06-05 23:42:03,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:03,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:03,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:03,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:03,734 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:04,028 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-06-05 23:42:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:42:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 23:42:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:04,068 INFO L225 Difference]: With dead ends: 20371 [2021-06-05 23:42:04,068 INFO L226 Difference]: Without dead ends: 18706 [2021-06-05 23:42:04,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:42:04,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-06-05 23:42:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-06-05 23:42:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-06-05 23:42:04,382 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-06-05 23:42:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:04,382 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-06-05 23:42:04,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-06-05 23:42:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:04,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:04,406 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:04,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 23:42:04,608 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:04,608 INFO L82 PathProgramCache]: Analyzing trace with hash -749871114, now seen corresponding path program 13 times [2021-06-05 23:42:04,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:04,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117632326] [2021-06-05 23:42:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:42:04,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:04,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117632326] [2021-06-05 23:42:04,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117632326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:04,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739732057] [2021-06-05 23:42:04,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:04,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:04,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:04,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739732057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:04,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:04,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:04,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207254216] [2021-06-05 23:42:04,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:04,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:04,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:04,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:04,719 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 23:42:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:05,100 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-06-05 23:42:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:42:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 34 [2021-06-05 23:42:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:05,167 INFO L225 Difference]: With dead ends: 29290 [2021-06-05 23:42:05,167 INFO L226 Difference]: Without dead ends: 27668 [2021-06-05 23:42:05,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:42:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-06-05 23:42:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-06-05 23:42:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-06-05 23:42:05,742 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-06-05 23:42:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:05,742 INFO L482 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-06-05 23:42:05,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 23:42:05,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-06-05 23:42:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:05,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:05,774 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:05,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:05,975 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:05,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1681290952, now seen corresponding path program 14 times [2021-06-05 23:42:05,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:05,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807361590] [2021-06-05 23:42:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:42:05,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:05,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807361590] [2021-06-05 23:42:05,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807361590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:05,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706962098] [2021-06-05 23:42:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:42:06,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:06,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:06,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:06,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706962098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:06,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:06,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:06,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274842302] [2021-06-05 23:42:06,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:06,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:06,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:06,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:06,104 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:06,493 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-06-05 23:42:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:42:06,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2021-06-05 23:42:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:06,567 INFO L225 Difference]: With dead ends: 27112 [2021-06-05 23:42:06,567 INFO L226 Difference]: Without dead ends: 26976 [2021-06-05 23:42:06,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:42:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-06-05 23:42:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-06-05 23:42:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-06-05 23:42:06,992 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-06-05 23:42:06,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:06,993 INFO L482 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-06-05 23:42:06,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-06-05 23:42:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:07,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:07,026 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:07,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:42:07,233 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1329276436, now seen corresponding path program 15 times [2021-06-05 23:42:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:07,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695735801] [2021-06-05 23:42:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:07,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:07,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695735801] [2021-06-05 23:42:07,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695735801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:07,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252327673] [2021-06-05 23:42:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:07,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:42:07,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:42:07,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252327673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:07,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:07,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 23:42:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023292151] [2021-06-05 23:42:07,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:42:07,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:42:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:42:07,395 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 23:42:07,649 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 23:42:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:08,051 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-06-05 23:42:08,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:42:08,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 34 [2021-06-05 23:42:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:08,144 INFO L225 Difference]: With dead ends: 30228 [2021-06-05 23:42:08,144 INFO L226 Difference]: Without dead ends: 30070 [2021-06-05 23:42:08,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:42:08,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-06-05 23:42:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-06-05 23:42:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-06-05 23:42:08,640 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-06-05 23:42:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:08,640 INFO L482 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-06-05 23:42:08,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 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 23:42:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-06-05 23:42:08,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:42:08,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:08,681 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:08,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 23:42:08,881 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash 190972073, now seen corresponding path program 16 times [2021-06-05 23:42:08,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:08,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073830870] [2021-06-05 23:42:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:42:08,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:08,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073830870] [2021-06-05 23:42:08,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073830870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:08,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001846090] [2021-06-05 23:42:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:08,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:08,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:08,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:42:08,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:42:09,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001846090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:09,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:09,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 23:42:09,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433233596] [2021-06-05 23:42:09,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:42:09,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:09,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:42:09,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:42:09,021 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:09,472 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-06-05 23:42:09,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:42:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:42:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:09,672 INFO L225 Difference]: With dead ends: 28338 [2021-06-05 23:42:09,672 INFO L226 Difference]: Without dead ends: 28230 [2021-06-05 23:42:09,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:42:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-06-05 23:42:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-06-05 23:42:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-06-05 23:42:10,292 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-06-05 23:42:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:10,292 INFO L482 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-06-05 23:42:10,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-06-05 23:42:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:42:10,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:10,344 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:10,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 23:42:10,545 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 832677239, now seen corresponding path program 17 times [2021-06-05 23:42:10,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:10,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286509592] [2021-06-05 23:42:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:42:10,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:10,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286509592] [2021-06-05 23:42:10,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286509592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:10,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145016395] [2021-06-05 23:42:10,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:10,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:42:10,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:10,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:42:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:42:10,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145016395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:10,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:10,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 23:42:10,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284768385] [2021-06-05 23:42:10,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:42:10,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:10,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:42:10,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:10,659 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:10,822 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-06-05 23:42:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:42:10,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:42:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:10,899 INFO L225 Difference]: With dead ends: 29898 [2021-06-05 23:42:10,899 INFO L226 Difference]: Without dead ends: 29898 [2021-06-05 23:42:10,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-06-05 23:42:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-06-05 23:42:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-06-05 23:42:11,443 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-06-05 23:42:11,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:11,444 INFO L482 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-06-05 23:42:11,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-06-05 23:42:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:42:11,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:11,481 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:11,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 23:42:11,682 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:11,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:11,682 INFO L82 PathProgramCache]: Analyzing trace with hash -97394957, now seen corresponding path program 18 times [2021-06-05 23:42:11,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:11,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619413711] [2021-06-05 23:42:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:42:11,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619413711] [2021-06-05 23:42:11,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619413711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547367374] [2021-06-05 23:42:11,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:11,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:42:11,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:42:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 23:42:11,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547367374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:11,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:11,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 23:42:11,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908741857] [2021-06-05 23:42:11,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:42:11,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:42:11,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:11,898 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 23:42:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:12,082 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-06-05 23:42:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:42:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2021-06-05 23:42:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:12,179 INFO L225 Difference]: With dead ends: 37062 [2021-06-05 23:42:12,179 INFO L226 Difference]: Without dead ends: 37062 [2021-06-05 23:42:12,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:42:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-06-05 23:42:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-06-05 23:42:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-06-05 23:42:13,029 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-06-05 23:42:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:13,029 INFO L482 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-06-05 23:42:13,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 23:42:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-06-05 23:42:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:13,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:13,102 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:13,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:42:13,303 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 19 times [2021-06-05 23:42:13,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:13,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265891733] [2021-06-05 23:42:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:13,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:13,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265891733] [2021-06-05 23:42:13,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265891733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:13,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513360935] [2021-06-05 23:42:13,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:13,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:13,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:13,962 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:13,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:42:13,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:13,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:13,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:42:14,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:42:14,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:14,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:14,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:14,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:42:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:14,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513360935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:14,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:14,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:42:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897707507] [2021-06-05 23:42:14,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:42:14,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:14,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:42:14,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:42:14,094 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:15,404 INFO L93 Difference]: Finished difference Result 68650 states and 282459 transitions. [2021-06-05 23:42:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:42:15,405 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 39 [2021-06-05 23:42:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:15,624 INFO L225 Difference]: With dead ends: 68650 [2021-06-05 23:42:15,624 INFO L226 Difference]: Without dead ends: 68595 [2021-06-05 23:42:15,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 748.2ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:42:15,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68595 states. [2021-06-05 23:42:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68595 to 35386. [2021-06-05 23:42:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.1413310724883425) internal successors, (146541), 35385 states have internal predecessors, (146541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 146541 transitions. [2021-06-05 23:42:16,847 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 146541 transitions. Word has length 39 [2021-06-05 23:42:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:16,847 INFO L482 AbstractCegarLoop]: Abstraction has 35386 states and 146541 transitions. [2021-06-05 23:42:16,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 146541 transitions. [2021-06-05 23:42:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:16,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:16,923 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:17,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:17,124 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:17,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 20 times [2021-06-05 23:42:17,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:17,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937360574] [2021-06-05 23:42:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:17,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:17,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937360574] [2021-06-05 23:42:17,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937360574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:17,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145358536] [2021-06-05 23:42:17,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:17,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:17,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:17,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:17,610 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:17,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:42:17,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:17,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:42:17,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:42:17,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:17,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:17,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:42:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145358536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:17,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:17,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:42:17,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152182830] [2021-06-05 23:42:17,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:17,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:17,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:17,772 INFO L87 Difference]: Start difference. First operand 35386 states and 146541 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:19,690 INFO L93 Difference]: Finished difference Result 63622 states and 260156 transitions. [2021-06-05 23:42:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:42:19,691 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:19,886 INFO L225 Difference]: With dead ends: 63622 [2021-06-05 23:42:19,886 INFO L226 Difference]: Without dead ends: 63406 [2021-06-05 23:42:19,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1098.7ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:42:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63406 states. [2021-06-05 23:42:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63406 to 35493. [2021-06-05 23:42:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35493 states, 35492 states have (on average 4.143947931928322) internal successors, (147077), 35492 states have internal predecessors, (147077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35493 states to 35493 states and 147077 transitions. [2021-06-05 23:42:21,104 INFO L78 Accepts]: Start accepts. Automaton has 35493 states and 147077 transitions. Word has length 39 [2021-06-05 23:42:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:21,104 INFO L482 AbstractCegarLoop]: Abstraction has 35493 states and 147077 transitions. [2021-06-05 23:42:21,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35493 states and 147077 transitions. [2021-06-05 23:42:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:21,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:21,170 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:21,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:42:21,371 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 21 times [2021-06-05 23:42:21,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:21,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199046530] [2021-06-05 23:42:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:21,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:21,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199046530] [2021-06-05 23:42:21,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199046530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:21,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057404782] [2021-06-05 23:42:21,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:21,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:42:21,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:42:21,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:21,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:21,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:42:21,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:21,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:21,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:21,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:81 [2021-06-05 23:42:22,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:22,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 23:42:22,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:22,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:22,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:22,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 23:42:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:22,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057404782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:22,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:22,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:42:22,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871164718] [2021-06-05 23:42:22,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:42:22,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:22,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:42:22,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:42:22,200 INFO L87 Difference]: Start difference. First operand 35493 states and 147077 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:22,676 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-05 23:42:24,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:24,491 INFO L93 Difference]: Finished difference Result 59288 states and 241076 transitions. [2021-06-05 23:42:24,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:42:24,491 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:24,660 INFO L225 Difference]: With dead ends: 59288 [2021-06-05 23:42:24,661 INFO L226 Difference]: Without dead ends: 59124 [2021-06-05 23:42:24,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1424.7ms TimeCoverageRelationStatistics Valid=530, Invalid=2020, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:42:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59124 states. [2021-06-05 23:42:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59124 to 35683. [2021-06-05 23:42:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35683 states, 35682 states have (on average 4.1406031052071075) internal successors, (147745), 35682 states have internal predecessors, (147745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35683 states to 35683 states and 147745 transitions. [2021-06-05 23:42:25,566 INFO L78 Accepts]: Start accepts. Automaton has 35683 states and 147745 transitions. Word has length 39 [2021-06-05 23:42:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:25,566 INFO L482 AbstractCegarLoop]: Abstraction has 35683 states and 147745 transitions. [2021-06-05 23:42:25,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:25,567 INFO L276 IsEmpty]: Start isEmpty. Operand 35683 states and 147745 transitions. [2021-06-05 23:42:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:25,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:25,630 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:25,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:25,831 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:25,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1267064945, now seen corresponding path program 22 times [2021-06-05 23:42:25,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:25,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182056803] [2021-06-05 23:42:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:26,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:26,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182056803] [2021-06-05 23:42:26,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182056803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:26,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539900494] [2021-06-05 23:42:26,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:26,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:26,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:26,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:26,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:26,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:42:26,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:26,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:26,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:26,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:42:26,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:42:26,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:26,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:26,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:26,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:42:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:26,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539900494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:26,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:26,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:42:26,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280158846] [2021-06-05 23:42:26,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:26,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:26,471 INFO L87 Difference]: Start difference. First operand 35683 states and 147745 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:28,361 INFO L93 Difference]: Finished difference Result 76962 states and 312761 transitions. [2021-06-05 23:42:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:42:28,362 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:28,801 INFO L225 Difference]: With dead ends: 76962 [2021-06-05 23:42:28,801 INFO L226 Difference]: Without dead ends: 76778 [2021-06-05 23:42:28,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1156.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:42:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76778 states. [2021-06-05 23:42:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76778 to 35521. [2021-06-05 23:42:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35521 states, 35520 states have (on average 4.1433277027027025) internal successors, (147171), 35520 states have internal predecessors, (147171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35521 states to 35521 states and 147171 transitions. [2021-06-05 23:42:30,017 INFO L78 Accepts]: Start accepts. Automaton has 35521 states and 147171 transitions. Word has length 39 [2021-06-05 23:42:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:30,017 INFO L482 AbstractCegarLoop]: Abstraction has 35521 states and 147171 transitions. [2021-06-05 23:42:30,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 35521 states and 147171 transitions. [2021-06-05 23:42:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:30,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:30,085 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:30,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:42:30,289 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:30,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 23 times [2021-06-05 23:42:30,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:30,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126359670] [2021-06-05 23:42:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:30,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:30,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126359670] [2021-06-05 23:42:30,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126359670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:30,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108722155] [2021-06-05 23:42:30,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:30,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:42:30,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:42:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:30,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:30,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:30,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 23:42:30,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:42:30,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:30,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:30,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:45 [2021-06-05 23:42:30,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:30,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:30,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 23:42:30,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:31,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:31,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:31,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:61 [2021-06-05 23:42:31,729 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 23:42:31,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:31,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:42:31,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-06-05 23:42:31,764 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:31,783 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.8 percent of original size [2021-06-05 23:42:31,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:31,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:21 [2021-06-05 23:42:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:31,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108722155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:31,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:31,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:42:31,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106976872] [2021-06-05 23:42:31,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:42:31,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:42:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:42:31,853 INFO L87 Difference]: Start difference. First operand 35521 states and 147171 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:32,639 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-06-05 23:42:32,893 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 23:42:33,319 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-05 23:42:33,958 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-05 23:42:35,129 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-06-05 23:42:36,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:36,264 INFO L93 Difference]: Finished difference Result 64923 states and 264691 transitions. [2021-06-05 23:42:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:42:36,264 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:36,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:36,451 INFO L225 Difference]: With dead ends: 64923 [2021-06-05 23:42:36,451 INFO L226 Difference]: Without dead ends: 64829 [2021-06-05 23:42:36,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 3610.1ms TimeCoverageRelationStatistics Valid=697, Invalid=4133, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:42:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64829 states. [2021-06-05 23:42:37,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64829 to 36170. [2021-06-05 23:42:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36170 states, 36169 states have (on average 4.1395117365699905) internal successors, (149722), 36169 states have internal predecessors, (149722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36170 states to 36170 states and 149722 transitions. [2021-06-05 23:42:37,716 INFO L78 Accepts]: Start accepts. Automaton has 36170 states and 149722 transitions. Word has length 39 [2021-06-05 23:42:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:37,716 INFO L482 AbstractCegarLoop]: Abstraction has 36170 states and 149722 transitions. [2021-06-05 23:42:37,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:37,717 INFO L276 IsEmpty]: Start isEmpty. Operand 36170 states and 149722 transitions. [2021-06-05 23:42:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:37,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:37,787 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:37,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:42:37,988 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash -337359375, now seen corresponding path program 24 times [2021-06-05 23:42:37,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:37,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277263558] [2021-06-05 23:42:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:38,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277263558] [2021-06-05 23:42:38,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277263558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:38,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2928476] [2021-06-05 23:42:38,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:38,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:42:38,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:42:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:38,527 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:38,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:42:38,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:38,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:38,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:38,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:42:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:42:38,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:38,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:38,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:38,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:42:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:38,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2928476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:38,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:38,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:42:38,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699844179] [2021-06-05 23:42:38,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:38,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:38,649 INFO L87 Difference]: Start difference. First operand 36170 states and 149722 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:40,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:40,052 INFO L93 Difference]: Finished difference Result 68165 states and 280651 transitions. [2021-06-05 23:42:40,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:42:40,052 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:40,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:40,277 INFO L225 Difference]: With dead ends: 68165 [2021-06-05 23:42:40,278 INFO L226 Difference]: Without dead ends: 68110 [2021-06-05 23:42:40,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:42:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68110 states. [2021-06-05 23:42:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68110 to 35744. [2021-06-05 23:42:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35744 states, 35743 states have (on average 4.14192988836975) internal successors, (148045), 35743 states have internal predecessors, (148045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35744 states to 35744 states and 148045 transitions. [2021-06-05 23:42:41,363 INFO L78 Accepts]: Start accepts. Automaton has 35744 states and 148045 transitions. Word has length 39 [2021-06-05 23:42:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:41,363 INFO L482 AbstractCegarLoop]: Abstraction has 35744 states and 148045 transitions. [2021-06-05 23:42:41,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 35744 states and 148045 transitions. [2021-06-05 23:42:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:41,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:41,428 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:41,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 23:42:41,630 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 25 times [2021-06-05 23:42:41,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:41,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862087490] [2021-06-05 23:42:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:41,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:41,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862087490] [2021-06-05 23:42:41,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862087490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:41,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265255806] [2021-06-05 23:42:41,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:42,111 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:42,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:42:42,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:42,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:42,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:42,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:42:42,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:42:42,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:42,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:42,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:42,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:42:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:42,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265255806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:42,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:42,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:42:42,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069563045] [2021-06-05 23:42:42,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:42,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:42,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:42,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:42,256 INFO L87 Difference]: Start difference. First operand 35744 states and 148045 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:42,718 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 23:42:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:44,045 INFO L93 Difference]: Finished difference Result 63705 states and 260677 transitions. [2021-06-05 23:42:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:42:44,045 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:44,233 INFO L225 Difference]: With dead ends: 63705 [2021-06-05 23:42:44,233 INFO L226 Difference]: Without dead ends: 63489 [2021-06-05 23:42:44,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1237.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:42:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63489 states. [2021-06-05 23:42:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63489 to 35594. [2021-06-05 23:42:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35594 states, 35593 states have (on average 4.1428651701177195) internal successors, (147457), 35593 states have internal predecessors, (147457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35594 states to 35594 states and 147457 transitions. [2021-06-05 23:42:45,438 INFO L78 Accepts]: Start accepts. Automaton has 35594 states and 147457 transitions. Word has length 39 [2021-06-05 23:42:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:45,439 INFO L482 AbstractCegarLoop]: Abstraction has 35594 states and 147457 transitions. [2021-06-05 23:42:45,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 35594 states and 147457 transitions. [2021-06-05 23:42:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:45,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:45,525 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:45,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:45,735 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:45,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:45,735 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 26 times [2021-06-05 23:42:45,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:45,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788704578] [2021-06-05 23:42:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:46,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:46,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788704578] [2021-06-05 23:42:46,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788704578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:46,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776572470] [2021-06-05 23:42:46,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:46,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:42:46,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:46,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:46,271 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:46,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:42:46,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:46,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:46,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:46,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:42:46,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:42:46,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:46,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:46,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:46,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:42:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:46,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776572470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:46,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:46,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:42:46,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240608119] [2021-06-05 23:42:46,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:46,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:46,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:46,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:46,420 INFO L87 Difference]: Start difference. First operand 35594 states and 147457 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:47,892 INFO L93 Difference]: Finished difference Result 62825 states and 257100 transitions. [2021-06-05 23:42:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:42:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:48,094 INFO L225 Difference]: With dead ends: 62825 [2021-06-05 23:42:48,095 INFO L226 Difference]: Without dead ends: 62633 [2021-06-05 23:42:48,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 950.6ms TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:42:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62633 states. [2021-06-05 23:42:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62633 to 35555. [2021-06-05 23:42:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35555 states, 35554 states have (on average 4.1431906395904825) internal successors, (147307), 35554 states have internal predecessors, (147307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35555 states to 35555 states and 147307 transitions. [2021-06-05 23:42:49,056 INFO L78 Accepts]: Start accepts. Automaton has 35555 states and 147307 transitions. Word has length 39 [2021-06-05 23:42:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:49,056 INFO L482 AbstractCegarLoop]: Abstraction has 35555 states and 147307 transitions. [2021-06-05 23:42:49,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 35555 states and 147307 transitions. [2021-06-05 23:42:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:49,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:49,122 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:49,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:42:49,323 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1628962993, now seen corresponding path program 27 times [2021-06-05 23:42:49,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:49,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566697957] [2021-06-05 23:42:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:49,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:49,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566697957] [2021-06-05 23:42:49,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566697957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:49,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399062331] [2021-06-05 23:42:49,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:49,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:42:49,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:49,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:42:49,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:49,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:49,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:49,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:42:49,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:49,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:49,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:42:49,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:50 [2021-06-05 23:42:50,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:50,019 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 30 treesize of output 46 [2021-06-05 23:42:50,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:50,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:50,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:50,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:116 [2021-06-05 23:42:50,293 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-05 23:42:50,495 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 23:42:50,691 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_9, q2], 3=[v_prenex_10]} [2021-06-05 23:42:50,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:50,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:42:50,716 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:50,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:50,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:42:50,726 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:50,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:50,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:50,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:42:50,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:50,887 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.1 percent of original size [2021-06-05 23:42:50,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:50,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:50,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:50,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 23:42:50,898 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:42:50,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:42:50,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:42:50,902 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:50,954 INFO L628 ElimStorePlain]: treesize reduction 69, result has 49.3 percent of original size [2021-06-05 23:42:50,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 23:42:50,968 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:175, output treesize:65 [2021-06-05 23:42:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:51,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399062331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:51,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:51,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:42:51,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405738881] [2021-06-05 23:42:51,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:42:51,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:51,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:42:51,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:42:51,046 INFO L87 Difference]: Start difference. First operand 35555 states and 147307 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:52,260 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 73 [2021-06-05 23:42:52,601 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 23:42:52,786 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 23:42:52,953 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-06-05 23:42:54,390 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-06-05 23:42:56,407 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 23:42:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:42:57,668 INFO L93 Difference]: Finished difference Result 67568 states and 274876 transitions. [2021-06-05 23:42:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 23:42:57,668 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:42:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:42:57,980 INFO L225 Difference]: With dead ends: 67568 [2021-06-05 23:42:57,980 INFO L226 Difference]: Without dead ends: 67486 [2021-06-05 23:42:57,982 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3015 ImplicationChecksByTransitivity, 5493.6ms TimeCoverageRelationStatistics Valid=980, Invalid=8526, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 23:42:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67486 states. [2021-06-05 23:42:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67486 to 36428. [2021-06-05 23:42:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36428 states, 36427 states have (on average 4.138166744447799) internal successors, (150741), 36427 states have internal predecessors, (150741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36428 states to 36428 states and 150741 transitions. [2021-06-05 23:42:59,057 INFO L78 Accepts]: Start accepts. Automaton has 36428 states and 150741 transitions. Word has length 39 [2021-06-05 23:42:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:42:59,057 INFO L482 AbstractCegarLoop]: Abstraction has 36428 states and 150741 transitions. [2021-06-05 23:42:59,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:42:59,057 INFO L276 IsEmpty]: Start isEmpty. Operand 36428 states and 150741 transitions. [2021-06-05 23:42:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:42:59,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:42:59,126 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:42:59,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:59,327 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:42:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:42:59,327 INFO L82 PathProgramCache]: Analyzing trace with hash -867045925, now seen corresponding path program 28 times [2021-06-05 23:42:59,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:42:59,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389159112] [2021-06-05 23:42:59,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:42:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:42:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:59,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:42:59,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389159112] [2021-06-05 23:42:59,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389159112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:59,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004863183] [2021-06-05 23:42:59,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:42:59,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:42:59,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:42:59,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:42:59,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:42:59,814 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:42:59,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:42:59,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:59,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:59,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:59,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 23:42:59,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:42:59,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:42:59,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:42:59,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:42:59,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:42:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:42:59,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004863183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:42:59,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:42:59,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:42:59,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172557489] [2021-06-05 23:42:59,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:42:59,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:42:59,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:42:59,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:42:59,913 INFO L87 Difference]: Start difference. First operand 36428 states and 150741 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:01,378 INFO L93 Difference]: Finished difference Result 68647 states and 282569 transitions. [2021-06-05 23:43:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:43:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:01,592 INFO L225 Difference]: With dead ends: 68647 [2021-06-05 23:43:01,592 INFO L226 Difference]: Without dead ends: 68592 [2021-06-05 23:43:01,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 722.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:43:01,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68592 states. [2021-06-05 23:43:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68592 to 36130. [2021-06-05 23:43:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36130 states, 36129 states have (on average 4.138116194746602) internal successors, (149506), 36129 states have internal predecessors, (149506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36130 states to 36130 states and 149506 transitions. [2021-06-05 23:43:02,615 INFO L78 Accepts]: Start accepts. Automaton has 36130 states and 149506 transitions. Word has length 39 [2021-06-05 23:43:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:02,615 INFO L482 AbstractCegarLoop]: Abstraction has 36130 states and 149506 transitions. [2021-06-05 23:43:02,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:02,615 INFO L276 IsEmpty]: Start isEmpty. Operand 36130 states and 149506 transitions. [2021-06-05 23:43:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:02,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:02,682 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:02,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 23:43:02,882 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:02,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:02,883 INFO L82 PathProgramCache]: Analyzing trace with hash -731484829, now seen corresponding path program 29 times [2021-06-05 23:43:02,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:02,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140826120] [2021-06-05 23:43:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:03,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:03,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140826120] [2021-06-05 23:43:03,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140826120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:03,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345466464] [2021-06-05 23:43:03,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:03,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:43:03,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:03,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:43:03,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:03,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:03,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:03,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:03,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 23:43:03,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:03,403 INFO L628 ElimStorePlain]: treesize reduction 37, result has 52.6 percent of original size [2021-06-05 23:43:03,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:03,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:42 [2021-06-05 23:43:03,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:03,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:03,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:03,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:03,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:43:03,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:03,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:03,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:03,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:03,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:43:03,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:03,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:03,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:03,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:43:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:03,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345466464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:03,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:03,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:43:03,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90891118] [2021-06-05 23:43:03,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:43:03,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:03,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:43:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:43:03,655 INFO L87 Difference]: Start difference. First operand 36130 states and 149506 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:03,975 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-06-05 23:43:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:07,449 INFO L93 Difference]: Finished difference Result 71366 states and 291021 transitions. [2021-06-05 23:43:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:43:07,450 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:07,664 INFO L225 Difference]: With dead ends: 71366 [2021-06-05 23:43:07,664 INFO L226 Difference]: Without dead ends: 70937 [2021-06-05 23:43:07,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 2508.3ms TimeCoverageRelationStatistics Valid=717, Invalid=5135, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:43:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70937 states. [2021-06-05 23:43:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70937 to 36685. [2021-06-05 23:43:08,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36685 states, 36684 states have (on average 4.133873078181224) internal successors, (151647), 36684 states have internal predecessors, (151647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36685 states to 36685 states and 151647 transitions. [2021-06-05 23:43:08,685 INFO L78 Accepts]: Start accepts. Automaton has 36685 states and 151647 transitions. Word has length 39 [2021-06-05 23:43:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:08,685 INFO L482 AbstractCegarLoop]: Abstraction has 36685 states and 151647 transitions. [2021-06-05 23:43:08,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 36685 states and 151647 transitions. [2021-06-05 23:43:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:08,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:08,755 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:08,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-06-05 23:43:08,955 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:08,956 INFO L82 PathProgramCache]: Analyzing trace with hash -869929743, now seen corresponding path program 30 times [2021-06-05 23:43:08,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:08,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529695589] [2021-06-05 23:43:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:09,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:09,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529695589] [2021-06-05 23:43:09,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529695589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:09,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615421116] [2021-06-05 23:43:09,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:09,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:43:09,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:43:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:09,652 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:09,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:43:09,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:09,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:09,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:09,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:43:09,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:09,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:09,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:09,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:09,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:43:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:09,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615421116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:09,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:09,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:09,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694655250] [2021-06-05 23:43:09,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:09,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:09,769 INFO L87 Difference]: Start difference. First operand 36685 states and 151647 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:11,952 INFO L93 Difference]: Finished difference Result 78913 states and 320376 transitions. [2021-06-05 23:43:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:43:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:12,196 INFO L225 Difference]: With dead ends: 78913 [2021-06-05 23:43:12,196 INFO L226 Difference]: Without dead ends: 78697 [2021-06-05 23:43:12,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1288.4ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:43:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78697 states. [2021-06-05 23:43:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78697 to 36285. [2021-06-05 23:43:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36285 states, 36284 states have (on average 4.13661669055231) internal successors, (150093), 36284 states have internal predecessors, (150093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36285 states to 36285 states and 150093 transitions. [2021-06-05 23:43:13,269 INFO L78 Accepts]: Start accepts. Automaton has 36285 states and 150093 transitions. Word has length 39 [2021-06-05 23:43:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:13,270 INFO L482 AbstractCegarLoop]: Abstraction has 36285 states and 150093 transitions. [2021-06-05 23:43:13,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 36285 states and 150093 transitions. [2021-06-05 23:43:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:13,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:13,335 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:13,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:13,535 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:13,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:13,535 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 31 times [2021-06-05 23:43:13,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:13,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476705358] [2021-06-05 23:43:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:13,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:13,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476705358] [2021-06-05 23:43:13,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476705358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:13,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891176025] [2021-06-05 23:43:13,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:13,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:13,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:43:13,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:13,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:13,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:13,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:43:14,008 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:14,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-06-05 23:43:14,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:14,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:14,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:14,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-06-05 23:43:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:14,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891176025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:14,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:14,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:43:14,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214073479] [2021-06-05 23:43:14,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:43:14,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:43:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:43:14,055 INFO L87 Difference]: Start difference. First operand 36285 states and 150093 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:15,510 INFO L93 Difference]: Finished difference Result 71999 states and 296239 transitions. [2021-06-05 23:43:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:43:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 39 [2021-06-05 23:43:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:15,720 INFO L225 Difference]: With dead ends: 71999 [2021-06-05 23:43:15,720 INFO L226 Difference]: Without dead ends: 71944 [2021-06-05 23:43:15,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 680.2ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:43:15,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-06-05 23:43:16,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 36473. [2021-06-05 23:43:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36473 states, 36472 states have (on average 4.142684799298092) internal successors, (151092), 36472 states have internal predecessors, (151092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36473 states to 36473 states and 151092 transitions. [2021-06-05 23:43:16,827 INFO L78 Accepts]: Start accepts. Automaton has 36473 states and 151092 transitions. Word has length 39 [2021-06-05 23:43:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:16,827 INFO L482 AbstractCegarLoop]: Abstraction has 36473 states and 151092 transitions. [2021-06-05 23:43:16,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand 36473 states and 151092 transitions. [2021-06-05 23:43:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:16,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:16,897 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:17,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 23:43:17,097 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 32 times [2021-06-05 23:43:17,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:17,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598976223] [2021-06-05 23:43:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:17,421 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 23:43:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:17,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:17,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598976223] [2021-06-05 23:43:17,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598976223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:17,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242326351] [2021-06-05 23:43:17,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:17,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:17,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:17,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:43:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:17,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:43:17,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:17,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:17,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:17,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 23:43:17,902 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:17,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 29 [2021-06-05 23:43:17,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:17,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:17,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:17,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 23:43:17,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:17,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:43:17,937 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:17,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:17,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:17,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:43:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:17,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242326351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:17,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:17,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:43:17,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865705358] [2021-06-05 23:43:17,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:43:17,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:17,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:43:17,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:43:17,998 INFO L87 Difference]: Start difference. First operand 36473 states and 151092 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:20,002 INFO L93 Difference]: Finished difference Result 91941 states and 379072 transitions. [2021-06-05 23:43:20,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:43:20,003 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:20,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:20,277 INFO L225 Difference]: With dead ends: 91941 [2021-06-05 23:43:20,278 INFO L226 Difference]: Without dead ends: 91886 [2021-06-05 23:43:20,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1306.7ms TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:43:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91886 states. [2021-06-05 23:43:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91886 to 36713. [2021-06-05 23:43:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36713 states, 36712 states have (on average 4.144475920679887) internal successors, (152152), 36712 states have internal predecessors, (152152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36713 states to 36713 states and 152152 transitions. [2021-06-05 23:43:21,470 INFO L78 Accepts]: Start accepts. Automaton has 36713 states and 152152 transitions. Word has length 39 [2021-06-05 23:43:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:21,470 INFO L482 AbstractCegarLoop]: Abstraction has 36713 states and 152152 transitions. [2021-06-05 23:43:21,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 36713 states and 152152 transitions. [2021-06-05 23:43:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:21,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:21,537 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:21,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:21,738 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 33 times [2021-06-05 23:43:21,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:21,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390308014] [2021-06-05 23:43:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:22,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:22,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390308014] [2021-06-05 23:43:22,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390308014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:22,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448072258] [2021-06-05 23:43:22,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:22,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:43:22,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:43:22,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:22,572 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 23:43:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:22,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:22,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:43:22,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:22,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:22,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:22,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 23:43:22,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:22,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:22,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 53 [2021-06-05 23:43:22,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:22,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:22,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:22,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:43:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:22,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:22,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 23:43:22,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:43:22,821 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:43:22,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 23:43:22,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:22,828 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:43:22,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 23:43:22,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:22,879 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.1 percent of original size [2021-06-05 23:43:22,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:43:22,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:116, output treesize:81 [2021-06-05 23:43:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:22,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448072258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:22,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:22,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:43:22,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769856514] [2021-06-05 23:43:22,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:43:22,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:22,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:43:22,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:43:22,978 INFO L87 Difference]: Start difference. First operand 36713 states and 152152 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:27,519 INFO L93 Difference]: Finished difference Result 87602 states and 358764 transitions. [2021-06-05 23:43:27,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:43:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:27,787 INFO L225 Difference]: With dead ends: 87602 [2021-06-05 23:43:27,787 INFO L226 Difference]: Without dead ends: 87508 [2021-06-05 23:43:27,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2728.3ms TimeCoverageRelationStatistics Valid=782, Invalid=5698, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:43:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87508 states. [2021-06-05 23:43:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87508 to 37105. [2021-06-05 23:43:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37105 states, 37104 states have (on average 4.141116860715826) internal successors, (153652), 37104 states have internal predecessors, (153652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37105 states to 37105 states and 153652 transitions. [2021-06-05 23:43:29,044 INFO L78 Accepts]: Start accepts. Automaton has 37105 states and 153652 transitions. Word has length 39 [2021-06-05 23:43:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:29,045 INFO L482 AbstractCegarLoop]: Abstraction has 37105 states and 153652 transitions. [2021-06-05 23:43:29,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 37105 states and 153652 transitions. [2021-06-05 23:43:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:29,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:29,119 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:29,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:29,323 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:29,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 34 times [2021-06-05 23:43:29,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:29,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503358138] [2021-06-05 23:43:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:29,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:29,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503358138] [2021-06-05 23:43:29,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503358138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:29,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176215382] [2021-06-05 23:43:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:43:29,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:43:29,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:29,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:29,856 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:29,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 21 [2021-06-05 23:43:29,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:29,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:29,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:29,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:43:29,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:29,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:29,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:29,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:29,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:43:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:29,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176215382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:29,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:29,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:29,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328727241] [2021-06-05 23:43:29,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:29,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:29,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:29,938 INFO L87 Difference]: Start difference. First operand 37105 states and 153652 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:30,809 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 23:43:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:31,401 INFO L93 Difference]: Finished difference Result 65546 states and 267894 transitions. [2021-06-05 23:43:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:43:31,402 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:31,592 INFO L225 Difference]: With dead ends: 65546 [2021-06-05 23:43:31,592 INFO L226 Difference]: Without dead ends: 65298 [2021-06-05 23:43:31,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1132.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:43:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65298 states. [2021-06-05 23:43:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65298 to 37291. [2021-06-05 23:43:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37291 states, 37290 states have (on average 4.139233038348083) internal successors, (154352), 37290 states have internal predecessors, (154352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37291 states to 37291 states and 154352 transitions. [2021-06-05 23:43:32,669 INFO L78 Accepts]: Start accepts. Automaton has 37291 states and 154352 transitions. Word has length 39 [2021-06-05 23:43:32,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:32,669 INFO L482 AbstractCegarLoop]: Abstraction has 37291 states and 154352 transitions. [2021-06-05 23:43:32,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 37291 states and 154352 transitions. [2021-06-05 23:43:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:32,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:32,740 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:32,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 23:43:32,941 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:32,941 INFO L82 PathProgramCache]: Analyzing trace with hash 452270203, now seen corresponding path program 35 times [2021-06-05 23:43:32,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:32,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484611273] [2021-06-05 23:43:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:33,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:33,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484611273] [2021-06-05 23:43:33,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484611273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:33,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746924095] [2021-06-05 23:43:33,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:33,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:43:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:43:33,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:33,745 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-05 23:43:33,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:33,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:43:33,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:33,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:43:33,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:81 [2021-06-05 23:43:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-06-05 23:43:33,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:43:33,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:33,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 23:43:33,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:33,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:33,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:43:33,967 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:178, output treesize:85 [2021-06-05 23:43:34,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:34,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:34,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:43:34,166 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:34,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:34,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:34,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:43:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:34,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746924095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:34,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:34,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:43:34,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802429737] [2021-06-05 23:43:34,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:43:34,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:34,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:43:34,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:43:34,225 INFO L87 Difference]: Start difference. First operand 37291 states and 154352 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:36,170 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 52 [2021-06-05 23:43:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:39,484 INFO L93 Difference]: Finished difference Result 85788 states and 347843 transitions. [2021-06-05 23:43:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:43:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:39,736 INFO L225 Difference]: With dead ends: 85788 [2021-06-05 23:43:39,736 INFO L226 Difference]: Without dead ends: 85305 [2021-06-05 23:43:39,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 3840.8ms TimeCoverageRelationStatistics Valid=1151, Invalid=6681, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:43:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85305 states. [2021-06-05 23:43:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85305 to 37473. [2021-06-05 23:43:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37473 states, 37472 states have (on average 4.138076430401366) internal successors, (155062), 37472 states have internal predecessors, (155062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37473 states to 37473 states and 155062 transitions. [2021-06-05 23:43:40,913 INFO L78 Accepts]: Start accepts. Automaton has 37473 states and 155062 transitions. Word has length 39 [2021-06-05 23:43:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:40,913 INFO L482 AbstractCegarLoop]: Abstraction has 37473 states and 155062 transitions. [2021-06-05 23:43:40,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 37473 states and 155062 transitions. [2021-06-05 23:43:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:40,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:40,983 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:41,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 23:43:41,184 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:41,184 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 36 times [2021-06-05 23:43:41,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:41,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137318081] [2021-06-05 23:43:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:41,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:41,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137318081] [2021-06-05 23:43:41,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137318081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:41,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283657433] [2021-06-05 23:43:41,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:41,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:43:41,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:41,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:43:41,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:41,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:43:41,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:41,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:41,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:41,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:43:41,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:41,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 29 [2021-06-05 23:43:41,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:41,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:41,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:41,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 23:43:41,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:41,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:43:41,787 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:41,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:41,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:41,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:43:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:41,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283657433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:41,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:41,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:43:41,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363701906] [2021-06-05 23:43:41,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:43:41,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:41,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:43:41,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:43:41,840 INFO L87 Difference]: Start difference. First operand 37473 states and 155062 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:42,482 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 23:43:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:44,628 INFO L93 Difference]: Finished difference Result 69289 states and 282095 transitions. [2021-06-05 23:43:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:43:44,628 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:44,832 INFO L225 Difference]: With dead ends: 69289 [2021-06-05 23:43:44,833 INFO L226 Difference]: Without dead ends: 69125 [2021-06-05 23:43:44,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1668.1ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:43:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69125 states. [2021-06-05 23:43:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69125 to 37795. [2021-06-05 23:43:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37795 states, 37794 states have (on average 4.137587976927555) internal successors, (156376), 37794 states have internal predecessors, (156376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37795 states to 37795 states and 156376 transitions. [2021-06-05 23:43:45,941 INFO L78 Accepts]: Start accepts. Automaton has 37795 states and 156376 transitions. Word has length 39 [2021-06-05 23:43:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:45,941 INFO L482 AbstractCegarLoop]: Abstraction has 37795 states and 156376 transitions. [2021-06-05 23:43:45,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 37795 states and 156376 transitions. [2021-06-05 23:43:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:46,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:46,010 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:46,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 23:43:46,211 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:46,211 INFO L82 PathProgramCache]: Analyzing trace with hash -941570975, now seen corresponding path program 37 times [2021-06-05 23:43:46,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:46,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288544977] [2021-06-05 23:43:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:46,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:46,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288544977] [2021-06-05 23:43:46,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288544977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:46,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602844379] [2021-06-05 23:43:46,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:46,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:43:46,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:46,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:46,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:46,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:43:46,785 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:46,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:43:46,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:46,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:46,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:46,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:43:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:46,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602844379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:46,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:46,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:46,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765805139] [2021-06-05 23:43:46,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:46,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:46,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:46,844 INFO L87 Difference]: Start difference. First operand 37795 states and 156376 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:48,967 INFO L93 Difference]: Finished difference Result 95424 states and 387343 transitions. [2021-06-05 23:43:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:43:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:49,257 INFO L225 Difference]: With dead ends: 95424 [2021-06-05 23:43:49,257 INFO L226 Difference]: Without dead ends: 95288 [2021-06-05 23:43:49,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1034.4ms TimeCoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:43:49,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95288 states. [2021-06-05 23:43:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95288 to 37555. [2021-06-05 23:43:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37555 states, 37554 states have (on average 4.140970336049422) internal successors, (155510), 37554 states have internal predecessors, (155510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37555 states to 37555 states and 155510 transitions. [2021-06-05 23:43:50,868 INFO L78 Accepts]: Start accepts. Automaton has 37555 states and 155510 transitions. Word has length 39 [2021-06-05 23:43:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:50,868 INFO L482 AbstractCegarLoop]: Abstraction has 37555 states and 155510 transitions. [2021-06-05 23:43:50,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 37555 states and 155510 transitions. [2021-06-05 23:43:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:50,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:50,948 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:51,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:51,163 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:51,164 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 38 times [2021-06-05 23:43:51,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:51,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944327838] [2021-06-05 23:43:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:51,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:51,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944327838] [2021-06-05 23:43:51,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944327838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:51,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598155156] [2021-06-05 23:43:51,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:51,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:43:51,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:43:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:51,846 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:43:51,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:43:51,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:51,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:51,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:51,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:43:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:43:51,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:51,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:51,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:51,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:43:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:51,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598155156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:51,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:51,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:43:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56650202] [2021-06-05 23:43:51,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:43:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:43:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:43:51,976 INFO L87 Difference]: Start difference. First operand 37555 states and 155510 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:53,565 INFO L93 Difference]: Finished difference Result 64761 states and 264970 transitions. [2021-06-05 23:43:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:43:53,565 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:43:53,760 INFO L225 Difference]: With dead ends: 64761 [2021-06-05 23:43:53,760 INFO L226 Difference]: Without dead ends: 64569 [2021-06-05 23:43:53,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1009.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:43:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64569 states. [2021-06-05 23:43:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64569 to 37579. [2021-06-05 23:43:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37579 states, 37578 states have (on average 4.1405609665229655) internal successors, (155594), 37578 states have internal predecessors, (155594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37579 states to 37579 states and 155594 transitions. [2021-06-05 23:43:54,840 INFO L78 Accepts]: Start accepts. Automaton has 37579 states and 155594 transitions. Word has length 39 [2021-06-05 23:43:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:43:54,840 INFO L482 AbstractCegarLoop]: Abstraction has 37579 states and 155594 transitions. [2021-06-05 23:43:54,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 37579 states and 155594 transitions. [2021-06-05 23:43:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:43:54,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:43:54,911 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:43:55,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 23:43:55,111 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:43:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:43:55,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 39 times [2021-06-05 23:43:55,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:43:55,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925225880] [2021-06-05 23:43:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:43:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:43:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:55,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:43:55,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925225880] [2021-06-05 23:43:55,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925225880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:55,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377614425] [2021-06-05 23:43:55,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:43:55,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:43:55,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:43:55,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:43:55,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:43:55,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:55,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:43:55,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:55,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:55,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:55,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-06-05 23:43:55,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:43:55,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:55,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:55,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:43:55,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-06-05 23:43:55,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:43:55,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:55,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:43:55,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:43:55,966 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:43:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:43:55,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:43:55,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-06-05 23:43:55,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:43:56,020 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.5 percent of original size [2021-06-05 23:43:56,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:43:56,021 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:54 [2021-06-05 23:43:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:43:56,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377614425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:43:56,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:43:56,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 23:43:56,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463997446] [2021-06-05 23:43:56,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:43:56,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:43:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:43:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:43:56,177 INFO L87 Difference]: Start difference. First operand 37579 states and 155594 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:43:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:43:59,941 INFO L93 Difference]: Finished difference Result 62542 states and 254035 transitions. [2021-06-05 23:43:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:43:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:43:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:00,126 INFO L225 Difference]: With dead ends: 62542 [2021-06-05 23:44:00,126 INFO L226 Difference]: Without dead ends: 62394 [2021-06-05 23:44:00,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 3075.7ms TimeCoverageRelationStatistics Valid=819, Invalid=4293, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:44:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62394 states. [2021-06-05 23:44:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62394 to 37873. [2021-06-05 23:44:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37873 states, 37872 states have (on average 4.136670891423743) internal successors, (156664), 37872 states have internal predecessors, (156664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37873 states to 37873 states and 156664 transitions. [2021-06-05 23:44:01,069 INFO L78 Accepts]: Start accepts. Automaton has 37873 states and 156664 transitions. Word has length 39 [2021-06-05 23:44:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:01,069 INFO L482 AbstractCegarLoop]: Abstraction has 37873 states and 156664 transitions. [2021-06-05 23:44:01,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 37873 states and 156664 transitions. [2021-06-05 23:44:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:01,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:01,140 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:01,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:01,343 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:01,344 INFO L82 PathProgramCache]: Analyzing trace with hash 461863935, now seen corresponding path program 40 times [2021-06-05 23:44:01,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:01,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338766175] [2021-06-05 23:44:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:01,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:01,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338766175] [2021-06-05 23:44:01,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338766175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:01,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381108968] [2021-06-05 23:44:01,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:01,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:01,880 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:01,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:44:01,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:01,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:01,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:01,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:44:01,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:01,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:01,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:01,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:01,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:44:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:01,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381108968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:01,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:01,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:01,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404644563] [2021-06-05 23:44:01,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:01,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:01,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:01,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:01,956 INFO L87 Difference]: Start difference. First operand 37873 states and 156664 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:02,676 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-06-05 23:44:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:03,636 INFO L93 Difference]: Finished difference Result 79867 states and 324316 transitions. [2021-06-05 23:44:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:44:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:03,865 INFO L225 Difference]: With dead ends: 79867 [2021-06-05 23:44:03,865 INFO L226 Difference]: Without dead ends: 79643 [2021-06-05 23:44:03,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1246.3ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:44:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79643 states. [2021-06-05 23:44:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79643 to 37765. [2021-06-05 23:44:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37765 states, 37764 states have (on average 4.138703527168732) internal successors, (156294), 37764 states have internal predecessors, (156294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37765 states to 37765 states and 156294 transitions. [2021-06-05 23:44:05,057 INFO L78 Accepts]: Start accepts. Automaton has 37765 states and 156294 transitions. Word has length 39 [2021-06-05 23:44:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:05,057 INFO L482 AbstractCegarLoop]: Abstraction has 37765 states and 156294 transitions. [2021-06-05 23:44:05,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 37765 states and 156294 transitions. [2021-06-05 23:44:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:05,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:05,133 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:05,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:05,347 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 41 times [2021-06-05 23:44:05,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:05,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662338402] [2021-06-05 23:44:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:05,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662338402] [2021-06-05 23:44:05,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662338402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067705962] [2021-06-05 23:44:05,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:05,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:44:05,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:05,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:05,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:06,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:44:06,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:06,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:06,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:06,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:47 [2021-06-05 23:44:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:06,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:06,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:44:06,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:06,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:06,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:06,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2021-06-05 23:44:06,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:06,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 23:44:06,413 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:06,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:06,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:06,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 23:44:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:06,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067705962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:06,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:06,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:44:06,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104456053] [2021-06-05 23:44:06,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:44:06,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:06,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:44:06,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:44:06,474 INFO L87 Difference]: Start difference. First operand 37765 states and 156294 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:09,845 INFO L93 Difference]: Finished difference Result 95063 states and 386453 transitions. [2021-06-05 23:44:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:44:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:10,124 INFO L225 Difference]: With dead ends: 95063 [2021-06-05 23:44:10,124 INFO L226 Difference]: Without dead ends: 94672 [2021-06-05 23:44:10,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2456.4ms TimeCoverageRelationStatistics Valid=807, Invalid=4449, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:44:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94672 states. [2021-06-05 23:44:11,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94672 to 37931. [2021-06-05 23:44:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37931 states, 37930 states have (on average 4.138676509359346) internal successors, (156980), 37930 states have internal predecessors, (156980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37931 states to 37931 states and 156980 transitions. [2021-06-05 23:44:11,633 INFO L78 Accepts]: Start accepts. Automaton has 37931 states and 156980 transitions. Word has length 39 [2021-06-05 23:44:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:11,634 INFO L482 AbstractCegarLoop]: Abstraction has 37931 states and 156980 transitions. [2021-06-05 23:44:11,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 37931 states and 156980 transitions. [2021-06-05 23:44:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:11,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:11,714 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:11,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 23:44:11,914 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 42 times [2021-06-05 23:44:11,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:11,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502446804] [2021-06-05 23:44:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:12,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:12,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502446804] [2021-06-05 23:44:12,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502446804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:12,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580820107] [2021-06-05 23:44:12,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:12,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:44:12,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:12,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:44:12,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:12,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:44:12,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:44:12,524 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:44:12,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 23:44:12,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:44:12,555 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:12,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:12,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:44:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:12,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580820107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:12,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:12,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:44:12,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970165945] [2021-06-05 23:44:12,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:12,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:12,607 INFO L87 Difference]: Start difference. First operand 37931 states and 156980 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:14,897 INFO L93 Difference]: Finished difference Result 68287 states and 278156 transitions. [2021-06-05 23:44:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:44:14,897 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:15,107 INFO L225 Difference]: With dead ends: 68287 [2021-06-05 23:44:15,108 INFO L226 Difference]: Without dead ends: 68123 [2021-06-05 23:44:15,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1505.0ms TimeCoverageRelationStatistics Valid=510, Invalid=2246, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:44:15,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68123 states. [2021-06-05 23:44:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68123 to 37931. [2021-06-05 23:44:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37931 states, 37930 states have (on average 4.138676509359346) internal successors, (156980), 37930 states have internal predecessors, (156980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37931 states to 37931 states and 156980 transitions. [2021-06-05 23:44:16,177 INFO L78 Accepts]: Start accepts. Automaton has 37931 states and 156980 transitions. Word has length 39 [2021-06-05 23:44:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:16,178 INFO L482 AbstractCegarLoop]: Abstraction has 37931 states and 156980 transitions. [2021-06-05 23:44:16,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 37931 states and 156980 transitions. [2021-06-05 23:44:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:16,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:16,250 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:16,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:16,450 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:16,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:16,451 INFO L82 PathProgramCache]: Analyzing trace with hash 426158953, now seen corresponding path program 43 times [2021-06-05 23:44:16,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:16,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700922407] [2021-06-05 23:44:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:16,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:16,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700922407] [2021-06-05 23:44:16,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700922407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:16,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356453715] [2021-06-05 23:44:16,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:16,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:16,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:16,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:44:16,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:16,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:16,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:44:17,011 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:17,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:44:17,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:17,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:17,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:17,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:44:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:17,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356453715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:17,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:17,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:17,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458324404] [2021-06-05 23:44:17,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:17,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:17,053 INFO L87 Difference]: Start difference. First operand 37931 states and 156980 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:17,418 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-05 23:44:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:19,050 INFO L93 Difference]: Finished difference Result 95489 states and 387502 transitions. [2021-06-05 23:44:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:44:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:19,601 INFO L225 Difference]: With dead ends: 95489 [2021-06-05 23:44:19,601 INFO L226 Difference]: Without dead ends: 95369 [2021-06-05 23:44:19,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1239.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:44:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95369 states. [2021-06-05 23:44:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95369 to 37595. [2021-06-05 23:44:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37595 states, 37594 states have (on average 4.140288343884662) internal successors, (155650), 37594 states have internal predecessors, (155650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37595 states to 37595 states and 155650 transitions. [2021-06-05 23:44:20,951 INFO L78 Accepts]: Start accepts. Automaton has 37595 states and 155650 transitions. Word has length 39 [2021-06-05 23:44:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:20,951 INFO L482 AbstractCegarLoop]: Abstraction has 37595 states and 155650 transitions. [2021-06-05 23:44:20,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 37595 states and 155650 transitions. [2021-06-05 23:44:21,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:21,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:21,026 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:21,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 23:44:21,227 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1034892989, now seen corresponding path program 44 times [2021-06-05 23:44:21,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:21,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617722644] [2021-06-05 23:44:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:21,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:21,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617722644] [2021-06-05 23:44:21,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617722644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:21,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120738371] [2021-06-05 23:44:21,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:21,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:21,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:21,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:44:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:21,654 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:21,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:44:21,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:21,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:21,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:21,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:44:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:44:21,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:21,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:21,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:21,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-06-05 23:44:21,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:21,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:44:21,776 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:21,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:21,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:21,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:44:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:21,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120738371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:21,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:21,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:44:21,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680524003] [2021-06-05 23:44:21,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:21,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:21,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:21,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:21,818 INFO L87 Difference]: Start difference. First operand 37595 states and 155650 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:23,492 INFO L93 Difference]: Finished difference Result 80474 states and 331550 transitions. [2021-06-05 23:44:23,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:44:23,492 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:23,738 INFO L225 Difference]: With dead ends: 80474 [2021-06-05 23:44:23,738 INFO L226 Difference]: Without dead ends: 80419 [2021-06-05 23:44:23,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 965.1ms TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:44:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80419 states. [2021-06-05 23:44:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80419 to 37911. [2021-06-05 23:44:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37911 states, 37910 states have (on average 4.138406752835664) internal successors, (156887), 37910 states have internal predecessors, (156887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37911 states to 37911 states and 156887 transitions. [2021-06-05 23:44:24,958 INFO L78 Accepts]: Start accepts. Automaton has 37911 states and 156887 transitions. Word has length 39 [2021-06-05 23:44:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:24,959 INFO L482 AbstractCegarLoop]: Abstraction has 37911 states and 156887 transitions. [2021-06-05 23:44:24,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37911 states and 156887 transitions. [2021-06-05 23:44:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:25,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:25,034 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:25,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:25,235 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:25,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:25,235 INFO L82 PathProgramCache]: Analyzing trace with hash 899626485, now seen corresponding path program 45 times [2021-06-05 23:44:25,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:25,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453324744] [2021-06-05 23:44:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:25,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:25,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453324744] [2021-06-05 23:44:25,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453324744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:25,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577616970] [2021-06-05 23:44:25,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:25,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:44:25,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:44:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:25,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:44:25,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:25,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:25,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:25,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:94 [2021-06-05 23:44:25,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:25,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:44:25,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:25,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:25,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:25,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:37 [2021-06-05 23:44:26,168 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-06-05 23:44:26,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:26,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-06-05 23:44:26,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:26,237 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:44:26,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-06-05 23:44:26,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:26,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:26,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:44:26,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:26,286 INFO L628 ElimStorePlain]: treesize reduction 36, result has 60.0 percent of original size [2021-06-05 23:44:26,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:44:26,288 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:111, output treesize:45 [2021-06-05 23:44:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:26,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577616970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:26,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:26,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:44:26,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689952961] [2021-06-05 23:44:26,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:44:26,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:44:26,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:44:26,415 INFO L87 Difference]: Start difference. First operand 37911 states and 156887 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:28,820 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 23:44:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:29,450 INFO L93 Difference]: Finished difference Result 73756 states and 299227 transitions. [2021-06-05 23:44:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:44:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:29,685 INFO L225 Difference]: With dead ends: 73756 [2021-06-05 23:44:29,685 INFO L226 Difference]: Without dead ends: 73592 [2021-06-05 23:44:29,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2640.4ms TimeCoverageRelationStatistics Valid=917, Invalid=3373, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:44:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73592 states. [2021-06-05 23:44:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73592 to 38073. [2021-06-05 23:44:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38073 states, 38072 states have (on average 4.135874133221265) internal successors, (157461), 38072 states have internal predecessors, (157461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38073 states to 38073 states and 157461 transitions. [2021-06-05 23:44:30,792 INFO L78 Accepts]: Start accepts. Automaton has 38073 states and 157461 transitions. Word has length 39 [2021-06-05 23:44:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:30,792 INFO L482 AbstractCegarLoop]: Abstraction has 38073 states and 157461 transitions. [2021-06-05 23:44:30,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 38073 states and 157461 transitions. [2021-06-05 23:44:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:30,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:30,862 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:31,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 23:44:31,063 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:31,063 INFO L82 PathProgramCache]: Analyzing trace with hash -782210425, now seen corresponding path program 46 times [2021-06-05 23:44:31,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:31,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396104662] [2021-06-05 23:44:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:31,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396104662] [2021-06-05 23:44:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396104662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779527172] [2021-06-05 23:44:31,349 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:31,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:31,518 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:31,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:44:31,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:31,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:31,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:31,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:44:31,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:31,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:31,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:31,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:31,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:44:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:31,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779527172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:31,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:31,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:31,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824683380] [2021-06-05 23:44:31,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:31,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:31,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:31,657 INFO L87 Difference]: Start difference. First operand 38073 states and 157461 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:33,678 INFO L93 Difference]: Finished difference Result 80373 states and 326640 transitions. [2021-06-05 23:44:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:44:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:33,912 INFO L225 Difference]: With dead ends: 80373 [2021-06-05 23:44:33,913 INFO L226 Difference]: Without dead ends: 80181 [2021-06-05 23:44:33,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1111.3ms TimeCoverageRelationStatistics Valid=428, Invalid=2122, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:44:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80181 states. [2021-06-05 23:44:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80181 to 37761. [2021-06-05 23:44:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37761 states, 37760 states have (on average 4.13927436440678) internal successors, (156299), 37760 states have internal predecessors, (156299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37761 states to 37761 states and 156299 transitions. [2021-06-05 23:44:35,291 INFO L78 Accepts]: Start accepts. Automaton has 37761 states and 156299 transitions. Word has length 39 [2021-06-05 23:44:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:35,291 INFO L482 AbstractCegarLoop]: Abstraction has 37761 states and 156299 transitions. [2021-06-05 23:44:35,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 37761 states and 156299 transitions. [2021-06-05 23:44:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:35,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:35,379 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:35,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 23:44:35,580 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:35,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:35,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1502735341, now seen corresponding path program 47 times [2021-06-05 23:44:35,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:35,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919946156] [2021-06-05 23:44:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:35,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:35,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919946156] [2021-06-05 23:44:35,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919946156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:35,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000352027] [2021-06-05 23:44:35,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:35,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:44:35,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:35,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:44:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:36,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:36,141 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 26 treesize of output 44 [2021-06-05 23:44:36,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:36,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:36,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:36,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:42 [2021-06-05 23:44:36,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:36,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:36,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:36,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:36,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:36,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:27 [2021-06-05 23:44:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:36,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:36,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:44:36,468 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:36,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:36,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:36,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:44:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:36,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000352027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:36,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:36,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:44:36,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568994779] [2021-06-05 23:44:36,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:44:36,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:44:36,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:44:36,526 INFO L87 Difference]: Start difference. First operand 37761 states and 156299 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:38,032 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-06-05 23:44:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:40,593 INFO L93 Difference]: Finished difference Result 74525 states and 304283 transitions. [2021-06-05 23:44:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:44:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:40,970 INFO L225 Difference]: With dead ends: 74525 [2021-06-05 23:44:40,971 INFO L226 Difference]: Without dead ends: 74304 [2021-06-05 23:44:40,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2664.7ms TimeCoverageRelationStatistics Valid=818, Invalid=4584, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:44:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74304 states. [2021-06-05 23:44:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74304 to 38114. [2021-06-05 23:44:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38114 states, 38113 states have (on average 4.135518064702333) internal successors, (157617), 38113 states have internal predecessors, (157617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38114 states to 38114 states and 157617 transitions. [2021-06-05 23:44:42,107 INFO L78 Accepts]: Start accepts. Automaton has 38114 states and 157617 transitions. Word has length 39 [2021-06-05 23:44:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:42,107 INFO L482 AbstractCegarLoop]: Abstraction has 38114 states and 157617 transitions. [2021-06-05 23:44:42,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 38114 states and 157617 transitions. [2021-06-05 23:44:42,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:42,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:42,188 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:42,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:42,397 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1311781951, now seen corresponding path program 48 times [2021-06-05 23:44:42,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:42,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895332167] [2021-06-05 23:44:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:42,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:42,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895332167] [2021-06-05 23:44:42,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895332167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:42,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092754092] [2021-06-05 23:44:42,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:42,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:44:42,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:44:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:42,854 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:42,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:44:42,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:44:42,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:42,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:42,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:42,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:44:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:42,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092754092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:42,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:42,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:42,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442990798] [2021-06-05 23:44:42,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:42,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:42,985 INFO L87 Difference]: Start difference. First operand 38114 states and 157617 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:44,682 INFO L93 Difference]: Finished difference Result 80215 states and 325882 transitions. [2021-06-05 23:44:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:44:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:44,932 INFO L225 Difference]: With dead ends: 80215 [2021-06-05 23:44:44,932 INFO L226 Difference]: Without dead ends: 80031 [2021-06-05 23:44:44,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1004.3ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:44:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80031 states. [2021-06-05 23:44:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80031 to 37852. [2021-06-05 23:44:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37852 states, 37851 states have (on average 4.138754590367493) internal successors, (156656), 37851 states have internal predecessors, (156656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37852 states to 37852 states and 156656 transitions. [2021-06-05 23:44:46,112 INFO L78 Accepts]: Start accepts. Automaton has 37852 states and 156656 transitions. Word has length 39 [2021-06-05 23:44:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:46,112 INFO L482 AbstractCegarLoop]: Abstraction has 37852 states and 156656 transitions. [2021-06-05 23:44:46,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37852 states and 156656 transitions. [2021-06-05 23:44:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:46,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:46,187 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:46,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 23:44:46,388 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:46,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1564579539, now seen corresponding path program 49 times [2021-06-05 23:44:46,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:46,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103916606] [2021-06-05 23:44:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:46,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:46,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103916606] [2021-06-05 23:44:46,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103916606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:46,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152691827] [2021-06-05 23:44:46,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:46,845 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:46,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:44:46,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:44:46,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:44:46,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:46,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:46,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:44:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:46,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152691827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:46,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:46,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:44:46,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217432868] [2021-06-05 23:44:46,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:44:46,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:46,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:44:46,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:44:46,967 INFO L87 Difference]: Start difference. First operand 37852 states and 156656 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:48,443 INFO L93 Difference]: Finished difference Result 73140 states and 300824 transitions. [2021-06-05 23:44:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:44:48,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 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 39 [2021-06-05 23:44:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:48,667 INFO L225 Difference]: With dead ends: 73140 [2021-06-05 23:44:48,667 INFO L226 Difference]: Without dead ends: 73085 [2021-06-05 23:44:48,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 807.7ms TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:44:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73085 states. [2021-06-05 23:44:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73085 to 38148. [2021-06-05 23:44:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38148 states, 38147 states have (on average 4.139145935460194) internal successors, (157896), 38147 states have internal predecessors, (157896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38148 states to 38148 states and 157896 transitions. [2021-06-05 23:44:49,836 INFO L78 Accepts]: Start accepts. Automaton has 38148 states and 157896 transitions. Word has length 39 [2021-06-05 23:44:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:49,836 INFO L482 AbstractCegarLoop]: Abstraction has 38148 states and 157896 transitions. [2021-06-05 23:44:49,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 38148 states and 157896 transitions. [2021-06-05 23:44:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:49,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:49,907 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:50,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:50,107 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1913331931, now seen corresponding path program 50 times [2021-06-05 23:44:50,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:50,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936230118] [2021-06-05 23:44:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:50,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:50,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936230118] [2021-06-05 23:44:50,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936230118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:50,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919481216] [2021-06-05 23:44:50,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:50,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:50,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:50,602 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:50,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:44:50,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:50,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:50,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:50,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:44:50,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:44:50,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:50,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:50,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:50,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:44:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:50,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919481216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:50,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:50,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:50,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524977885] [2021-06-05 23:44:50,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:50,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:50,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:50,709 INFO L87 Difference]: Start difference. First operand 38148 states and 157896 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:51,241 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-06-05 23:44:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:52,308 INFO L93 Difference]: Finished difference Result 66535 states and 272055 transitions. [2021-06-05 23:44:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:44:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:52,507 INFO L225 Difference]: With dead ends: 66535 [2021-06-05 23:44:52,507 INFO L226 Difference]: Without dead ends: 66319 [2021-06-05 23:44:52,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1213.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:44:52,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66319 states. [2021-06-05 23:44:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66319 to 37929. [2021-06-05 23:44:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37929 states, 37928 states have (on average 4.138868382197849) internal successors, (156979), 37928 states have internal predecessors, (156979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37929 states to 37929 states and 156979 transitions. [2021-06-05 23:44:53,557 INFO L78 Accepts]: Start accepts. Automaton has 37929 states and 156979 transitions. Word has length 39 [2021-06-05 23:44:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:53,558 INFO L482 AbstractCegarLoop]: Abstraction has 37929 states and 156979 transitions. [2021-06-05 23:44:53,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 37929 states and 156979 transitions. [2021-06-05 23:44:53,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:53,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:53,626 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:53,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:53,833 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:53,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:53,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1573156905, now seen corresponding path program 51 times [2021-06-05 23:44:53,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:53,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700031021] [2021-06-05 23:44:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:54,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:54,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700031021] [2021-06-05 23:44:54,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700031021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:54,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698297185] [2021-06-05 23:44:54,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:44:54,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:44:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:54,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:44:54,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:54,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:54,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:54,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:32 [2021-06-05 23:44:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:54,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:54,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-06-05 23:44:54,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:54,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:54,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:44:54,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:83 [2021-06-05 23:44:54,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:54,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:44:54,684 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:54,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:54,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:44:54,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:44:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:54,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698297185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:54,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:54,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:44:54,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797570224] [2021-06-05 23:44:54,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:44:54,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:44:54,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:44:54,740 INFO L87 Difference]: Start difference. First operand 37929 states and 156979 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:57,334 INFO L93 Difference]: Finished difference Result 70813 states and 289318 transitions. [2021-06-05 23:44:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:44:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:44:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:57,559 INFO L225 Difference]: With dead ends: 70813 [2021-06-05 23:44:57,559 INFO L226 Difference]: Without dead ends: 70758 [2021-06-05 23:44:57,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1562.3ms TimeCoverageRelationStatistics Valid=521, Invalid=3511, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:44:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70758 states. [2021-06-05 23:44:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70758 to 38528. [2021-06-05 23:44:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38528 states, 38527 states have (on average 4.142341734368105) internal successors, (159592), 38527 states have internal predecessors, (159592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38528 states to 38528 states and 159592 transitions. [2021-06-05 23:44:58,718 INFO L78 Accepts]: Start accepts. Automaton has 38528 states and 159592 transitions. Word has length 39 [2021-06-05 23:44:58,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:58,718 INFO L482 AbstractCegarLoop]: Abstraction has 38528 states and 159592 transitions. [2021-06-05 23:44:58,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:58,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38528 states and 159592 transitions. [2021-06-05 23:44:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:44:58,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:58,797 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:58,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:58,997 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1254976421, now seen corresponding path program 52 times [2021-06-05 23:44:58,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:58,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922811040] [2021-06-05 23:44:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:59,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:59,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922811040] [2021-06-05 23:44:59,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922811040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:59,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073375156] [2021-06-05 23:44:59,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:59,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:44:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:59,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:44:59,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:59,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:59,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:59,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:44:59,493 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:44:59,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-06-05 23:44:59,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:59,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:59,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:59,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:44:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:59,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073375156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:59,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:59,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:44:59,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214231957] [2021-06-05 23:44:59,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:44:59,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:59,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:44:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:44:59,553 INFO L87 Difference]: Start difference. First operand 38528 states and 159592 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:01,274 INFO L93 Difference]: Finished difference Result 94804 states and 386746 transitions. [2021-06-05 23:45:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:45:01,275 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:01,562 INFO L225 Difference]: With dead ends: 94804 [2021-06-05 23:45:01,562 INFO L226 Difference]: Without dead ends: 94749 [2021-06-05 23:45:01,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 943.6ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:45:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94749 states. [2021-06-05 23:45:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94749 to 38365. [2021-06-05 23:45:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38365 states, 38364 states have (on average 4.141825669898863) internal successors, (158897), 38364 states have internal predecessors, (158897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38365 states to 38365 states and 158897 transitions. [2021-06-05 23:45:02,976 INFO L78 Accepts]: Start accepts. Automaton has 38365 states and 158897 transitions. Word has length 39 [2021-06-05 23:45:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:02,976 INFO L482 AbstractCegarLoop]: Abstraction has 38365 states and 158897 transitions. [2021-06-05 23:45:02,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 38365 states and 158897 transitions. [2021-06-05 23:45:03,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:03,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:03,050 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:03,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 23:45:03,253 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash 935568875, now seen corresponding path program 53 times [2021-06-05 23:45:03,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:03,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579495518] [2021-06-05 23:45:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:03,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:03,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579495518] [2021-06-05 23:45:03,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579495518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:03,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942704906] [2021-06-05 23:45:03,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:03,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:45:03,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:45:03,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:03,885 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 23:45:04,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:04,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 23:45:04,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:04,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:04,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:04,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:189 [2021-06-05 23:45:04,686 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 23:45:05,543 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 23:45:05,750 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 23:45:05,762 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_107, v_prenex_96, v_prenex_101, v_prenex_99, v_prenex_103, v_prenex_104, v_prenex_106], 3=[v_prenex_98, v_prenex_97, v_prenex_100, v_prenex_102, v_prenex_105]} [2021-06-05 23:45:05,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:05,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:05,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:06,005 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 23:45:06,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:06,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:06,234 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 23:45:06,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 35 [2021-06-05 23:45:06,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:06,460 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:45:06,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 23:45:06,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:06,714 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-05 23:45:06,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:06,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:06,985 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 23:45:06,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:07,003 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:07,215 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 23:45:07,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:07,231 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:07,437 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-05 23:45:07,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:45:07,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:07,656 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 23:45:07,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,679 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 37 treesize of output 55 [2021-06-05 23:45:07,680 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:07,883 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 23:45:07,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:07,913 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:45:07,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:45:07,914 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:08,305 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-06-05 23:45:08,306 INFO L628 ElimStorePlain]: treesize reduction 20, result has 97.0 percent of original size [2021-06-05 23:45:08,331 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:45:08,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:45:08,333 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:08,722 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 127 [2021-06-05 23:45:08,722 INFO L628 ElimStorePlain]: treesize reduction 20, result has 96.9 percent of original size [2021-06-05 23:45:08,746 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:45:08,746 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 44 treesize of output 48 [2021-06-05 23:45:08,748 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:09,127 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 114 [2021-06-05 23:45:09,128 INFO L628 ElimStorePlain]: treesize reduction 28, result has 95.4 percent of original size [2021-06-05 23:45:09,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:09,149 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 37 treesize of output 55 [2021-06-05 23:45:09,150 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:09,334 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 23:45:09,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:09,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 13 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 23:45:09,361 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 27 variables, input treesize:739, output treesize:422 [2021-06-05 23:45:09,504 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 23:45:09,692 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:09,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:45:09,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:09,736 INFO L628 ElimStorePlain]: treesize reduction 32, result has 62.8 percent of original size [2021-06-05 23:45:09,739 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:09,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 9 [2021-06-05 23:45:09,741 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:09,753 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-05 23:45:09,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:09,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:97, output treesize:13 [2021-06-05 23:45:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:09,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942704906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:09,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:09,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:45:09,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245003926] [2021-06-05 23:45:09,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:45:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:45:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:45:09,798 INFO L87 Difference]: Start difference. First operand 38365 states and 158897 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:10,339 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 32 [2021-06-05 23:45:10,630 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 23:45:11,242 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2021-06-05 23:45:11,618 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2021-06-05 23:45:11,858 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-06-05 23:45:12,250 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 23:45:12,513 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-06-05 23:45:12,806 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 51 [2021-06-05 23:45:13,820 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 23:45:14,180 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 23:45:14,794 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 23:45:14,996 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 23:45:15,446 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 23:45:15,633 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-05 23:45:16,007 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 23:45:16,420 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-05 23:45:16,665 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 23:45:16,956 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-05 23:45:17,145 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-06-05 23:45:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:17,516 INFO L93 Difference]: Finished difference Result 83581 states and 341899 transitions. [2021-06-05 23:45:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:45:17,516 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:17,775 INFO L225 Difference]: With dead ends: 83581 [2021-06-05 23:45:17,776 INFO L226 Difference]: Without dead ends: 83487 [2021-06-05 23:45:17,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 6670.4ms TimeCoverageRelationStatistics Valid=766, Invalid=5396, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:45:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83487 states. [2021-06-05 23:45:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83487 to 38825. [2021-06-05 23:45:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38825 states, 38824 states have (on average 4.141330105089636) internal successors, (160783), 38824 states have internal predecessors, (160783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38825 states to 38825 states and 160783 transitions. [2021-06-05 23:45:18,941 INFO L78 Accepts]: Start accepts. Automaton has 38825 states and 160783 transitions. Word has length 39 [2021-06-05 23:45:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:18,941 INFO L482 AbstractCegarLoop]: Abstraction has 38825 states and 160783 transitions. [2021-06-05 23:45:18,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 38825 states and 160783 transitions. [2021-06-05 23:45:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:19,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:19,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:19,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:19,213 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1940405397, now seen corresponding path program 54 times [2021-06-05 23:45:19,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:19,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959220991] [2021-06-05 23:45:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:19,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:19,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959220991] [2021-06-05 23:45:19,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959220991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390452420] [2021-06-05 23:45:19,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:19,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:45:19,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:45:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:19,736 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 23:45:19,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:45:19,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:19,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:45:19,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:19,927 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 37 treesize of output 55 [2021-06-05 23:45:19,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:19,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:19,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:45:19,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:23 [2021-06-05 23:45:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:20,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390452420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:20,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:20,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:45:20,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446591704] [2021-06-05 23:45:20,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:45:20,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:20,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:45:20,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:45:20,011 INFO L87 Difference]: Start difference. First operand 38825 states and 160783 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:22,899 INFO L93 Difference]: Finished difference Result 120157 states and 497782 transitions. [2021-06-05 23:45:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:45:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:23,296 INFO L225 Difference]: With dead ends: 120157 [2021-06-05 23:45:23,297 INFO L226 Difference]: Without dead ends: 120102 [2021-06-05 23:45:23,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1469.9ms TimeCoverageRelationStatistics Valid=468, Invalid=3072, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:45:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120102 states. [2021-06-05 23:45:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120102 to 39183. [2021-06-05 23:45:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39183 states, 39182 states have (on average 4.145551528763208) internal successors, (162431), 39182 states have internal predecessors, (162431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39183 states to 39183 states and 162431 transitions. [2021-06-05 23:45:24,828 INFO L78 Accepts]: Start accepts. Automaton has 39183 states and 162431 transitions. Word has length 39 [2021-06-05 23:45:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:24,828 INFO L482 AbstractCegarLoop]: Abstraction has 39183 states and 162431 transitions. [2021-06-05 23:45:24,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 39183 states and 162431 transitions. [2021-06-05 23:45:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:24,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:24,908 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:25,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 23:45:25,109 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1544758757, now seen corresponding path program 55 times [2021-06-05 23:45:25,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:25,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202870557] [2021-06-05 23:45:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:25,577 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 23:45:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:25,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:25,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202870557] [2021-06-05 23:45:25,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202870557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:25,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208265008] [2021-06-05 23:45:25,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:25,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:25,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:25,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:45:25,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:25,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:25,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:25,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:45:25,941 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:25,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:45:25,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:25,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:25,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:25,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:45:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:25,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208265008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:25,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:25,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:45:25,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026349934] [2021-06-05 23:45:25,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:45:25,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:45:25,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:25,982 INFO L87 Difference]: Start difference. First operand 39183 states and 162431 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:28,084 INFO L93 Difference]: Finished difference Result 115227 states and 467653 transitions. [2021-06-05 23:45:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:45:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:28,468 INFO L225 Difference]: With dead ends: 115227 [2021-06-05 23:45:28,469 INFO L226 Difference]: Without dead ends: 115172 [2021-06-05 23:45:28,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1360.3ms TimeCoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:45:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115172 states. [2021-06-05 23:45:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115172 to 38763. [2021-06-05 23:45:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38763 states, 38762 states have (on average 4.147644600381817) internal successors, (160771), 38762 states have internal predecessors, (160771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38763 states to 38763 states and 160771 transitions. [2021-06-05 23:45:30,009 INFO L78 Accepts]: Start accepts. Automaton has 38763 states and 160771 transitions. Word has length 39 [2021-06-05 23:45:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:30,009 INFO L482 AbstractCegarLoop]: Abstraction has 38763 states and 160771 transitions. [2021-06-05 23:45:30,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38763 states and 160771 transitions. [2021-06-05 23:45:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:30,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:30,089 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:30,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 23:45:30,293 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:30,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:30,307 INFO L82 PathProgramCache]: Analyzing trace with hash -463391085, now seen corresponding path program 56 times [2021-06-05 23:45:30,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:30,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705287715] [2021-06-05 23:45:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:30,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:30,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705287715] [2021-06-05 23:45:30,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705287715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:30,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578535780] [2021-06-05 23:45:30,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:30,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:30,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:30,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:31,092 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 23:45:31,131 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:31,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 21 [2021-06-05 23:45:31,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:31,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:31,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:31,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:45:31,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:45:31,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:31,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:31,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:31,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:45:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:31,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578535780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:31,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:31,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:45:31,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90513012] [2021-06-05 23:45:31,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:45:31,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:31,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:45:31,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:31,210 INFO L87 Difference]: Start difference. First operand 38763 states and 160771 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:32,637 INFO L93 Difference]: Finished difference Result 67529 states and 276217 transitions. [2021-06-05 23:45:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:45:32,637 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:32,849 INFO L225 Difference]: With dead ends: 67529 [2021-06-05 23:45:32,850 INFO L226 Difference]: Without dead ends: 67281 [2021-06-05 23:45:32,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1193.2ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:45:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67281 states. [2021-06-05 23:45:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67281 to 38949. [2021-06-05 23:45:33,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38949 states, 38948 states have (on average 4.1458097976789565) internal successors, (161471), 38948 states have internal predecessors, (161471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38949 states to 38949 states and 161471 transitions. [2021-06-05 23:45:33,936 INFO L78 Accepts]: Start accepts. Automaton has 38949 states and 161471 transitions. Word has length 39 [2021-06-05 23:45:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:33,936 INFO L482 AbstractCegarLoop]: Abstraction has 38949 states and 161471 transitions. [2021-06-05 23:45:33,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 38949 states and 161471 transitions. [2021-06-05 23:45:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:34,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:34,008 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:34,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:34,209 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:34,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1553694967, now seen corresponding path program 57 times [2021-06-05 23:45:34,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:34,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487785712] [2021-06-05 23:45:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:34,492 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 23:45:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:34,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:34,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487785712] [2021-06-05 23:45:34,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487785712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:34,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599893615] [2021-06-05 23:45:34,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:34,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:45:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:45:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:34,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:45:34,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:45:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:45:34,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:45:34,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:73 [2021-06-05 23:45:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:35,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599893615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:35,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:35,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:45:35,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317938505] [2021-06-05 23:45:35,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:45:35,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:35,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:45:35,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:45:35,014 INFO L87 Difference]: Start difference. First operand 38949 states and 161471 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:37,785 INFO L93 Difference]: Finished difference Result 84891 states and 344726 transitions. [2021-06-05 23:45:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:45:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:38,055 INFO L225 Difference]: With dead ends: 84891 [2021-06-05 23:45:38,055 INFO L226 Difference]: Without dead ends: 84677 [2021-06-05 23:45:38,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1906.2ms TimeCoverageRelationStatistics Valid=670, Invalid=3490, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:45:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84677 states. [2021-06-05 23:45:39,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84677 to 39215. [2021-06-05 23:45:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39215 states, 39214 states have (on average 4.1454327536084055) internal successors, (162559), 39214 states have internal predecessors, (162559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39215 states to 39215 states and 162559 transitions. [2021-06-05 23:45:39,273 INFO L78 Accepts]: Start accepts. Automaton has 39215 states and 162559 transitions. Word has length 39 [2021-06-05 23:45:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:39,273 INFO L482 AbstractCegarLoop]: Abstraction has 39215 states and 162559 transitions. [2021-06-05 23:45:39,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 39215 states and 162559 transitions. [2021-06-05 23:45:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:39,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:39,348 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:39,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 23:45:39,549 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1757615713, now seen corresponding path program 58 times [2021-06-05 23:45:39,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:39,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003651663] [2021-06-05 23:45:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:39,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:39,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003651663] [2021-06-05 23:45:39,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003651663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:39,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165863372] [2021-06-05 23:45:39,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:39,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:39,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:39,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:45:39,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:40,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:45:40,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:40,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:40,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:40,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:45:40,105 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:40,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:45:40,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:40,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:40,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:40,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:45:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:40,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165863372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:40,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:40,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:45:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134771012] [2021-06-05 23:45:40,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:45:40,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:40,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:45:40,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:45:40,146 INFO L87 Difference]: Start difference. First operand 39215 states and 162559 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:41,719 INFO L93 Difference]: Finished difference Result 72133 states and 294870 transitions. [2021-06-05 23:45:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:45:41,719 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:41,961 INFO L225 Difference]: With dead ends: 72133 [2021-06-05 23:45:41,962 INFO L226 Difference]: Without dead ends: 72043 [2021-06-05 23:45:41,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1049.1ms TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:45:42,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72043 states. [2021-06-05 23:45:42,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72043 to 39305. [2021-06-05 23:45:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39305 states, 39304 states have (on average 4.14576124567474) internal successors, (162945), 39304 states have internal predecessors, (162945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39305 states to 39305 states and 162945 transitions. [2021-06-05 23:45:43,125 INFO L78 Accepts]: Start accepts. Automaton has 39305 states and 162945 transitions. Word has length 39 [2021-06-05 23:45:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:43,125 INFO L482 AbstractCegarLoop]: Abstraction has 39305 states and 162945 transitions. [2021-06-05 23:45:43,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 39305 states and 162945 transitions. [2021-06-05 23:45:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:43,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:43,204 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:43,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 23:45:43,405 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash 159853789, now seen corresponding path program 59 times [2021-06-05 23:45:43,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:43,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497414679] [2021-06-05 23:45:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:43,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:43,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497414679] [2021-06-05 23:45:43,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497414679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:43,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138057310] [2021-06-05 23:45:43,700 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:43,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:45:43,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:43,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:45:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:44,100 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 23:45:44,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:44,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:45:44,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:44,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:44,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:44,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:74 [2021-06-05 23:45:46,553 INFO L446 ElimStorePlain]: Different costs {3=[q1], 6=[v_prenex_110, v_prenex_112]} [2021-06-05 23:45:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:46,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:46,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-06-05 23:45:46,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:46,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:46,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:46,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:46,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:46,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:46,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 23:45:46,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:46,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:46,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:46,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:46,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:46,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:46,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 55 [2021-06-05 23:45:46,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:46,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:46,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:45:46,782 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:185, output treesize:101 [2021-06-05 23:45:46,954 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_114], 6=[q2]} [2021-06-05 23:45:46,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:46,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:46,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 23:45:46,971 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:47,035 INFO L628 ElimStorePlain]: treesize reduction 13, result has 88.8 percent of original size [2021-06-05 23:45:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:47,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:47,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:47,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:45:47,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:45:47,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:47,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:45:47,096 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:135, output treesize:71 [2021-06-05 23:45:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138057310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:47,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:47,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:45:47,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440555314] [2021-06-05 23:45:47,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:45:47,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:45:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=851, Unknown=1, NotChecked=0, Total=992 [2021-06-05 23:45:47,225 INFO L87 Difference]: Start difference. First operand 39305 states and 162945 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:51,533 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2021-06-05 23:45:53,203 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-06-05 23:45:55,799 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-06-05 23:45:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:57,052 INFO L93 Difference]: Finished difference Result 108227 states and 436846 transitions. [2021-06-05 23:45:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 23:45:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:45:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:57,435 INFO L225 Difference]: With dead ends: 108227 [2021-06-05 23:45:57,435 INFO L226 Difference]: Without dead ends: 107921 [2021-06-05 23:45:57,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5695 ImplicationChecksByTransitivity, 9593.5ms TimeCoverageRelationStatistics Valid=2690, Invalid=13565, Unknown=1, NotChecked=0, Total=16256 [2021-06-05 23:45:57,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107921 states. [2021-06-05 23:45:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107921 to 38777. [2021-06-05 23:45:58,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38777 states, 38776 states have (on average 4.148983907571694) internal successors, (160881), 38776 states have internal predecessors, (160881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38777 states to 38777 states and 160881 transitions. [2021-06-05 23:45:59,077 INFO L78 Accepts]: Start accepts. Automaton has 38777 states and 160881 transitions. Word has length 39 [2021-06-05 23:45:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:59,077 INFO L482 AbstractCegarLoop]: Abstraction has 38777 states and 160881 transitions. [2021-06-05 23:45:59,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 38777 states and 160881 transitions. [2021-06-05 23:45:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:45:59,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:59,164 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:59,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 23:45:59,365 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1095343571, now seen corresponding path program 60 times [2021-06-05 23:45:59,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:59,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39668995] [2021-06-05 23:45:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:59,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:59,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39668995] [2021-06-05 23:45:59,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39668995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:59,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113337533] [2021-06-05 23:45:59,678 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:59,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:45:59,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:59,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:45:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:59,910 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:45:59,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:45:59,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:59,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:59,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:59,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:45:59,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:45:59,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:59,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:59,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:59,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:46:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:00,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113337533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:00,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:00,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:00,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630720244] [2021-06-05 23:46:00,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:00,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:00,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:00,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:00,021 INFO L87 Difference]: Start difference. First operand 38777 states and 160881 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:01,821 INFO L93 Difference]: Finished difference Result 66476 states and 272243 transitions. [2021-06-05 23:46:01,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:46:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:02,053 INFO L225 Difference]: With dead ends: 66476 [2021-06-05 23:46:02,054 INFO L226 Difference]: Without dead ends: 66284 [2021-06-05 23:46:02,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1247.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:46:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66284 states. [2021-06-05 23:46:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66284 to 38801. [2021-06-05 23:46:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38801 states, 38800 states have (on average 4.148582474226804) internal successors, (160965), 38800 states have internal predecessors, (160965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38801 states to 38801 states and 160965 transitions. [2021-06-05 23:46:03,281 INFO L78 Accepts]: Start accepts. Automaton has 38801 states and 160965 transitions. Word has length 39 [2021-06-05 23:46:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:03,281 INFO L482 AbstractCegarLoop]: Abstraction has 38801 states and 160965 transitions. [2021-06-05 23:46:03,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 38801 states and 160965 transitions. [2021-06-05 23:46:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:03,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:03,348 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:03,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:03,549 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1049841687, now seen corresponding path program 61 times [2021-06-05 23:46:03,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:03,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394931254] [2021-06-05 23:46:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:03,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:03,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394931254] [2021-06-05 23:46:03,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394931254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:03,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559983454] [2021-06-05 23:46:03,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:03,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:04,208 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 23:46:04,399 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:04,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 21 [2021-06-05 23:46:04,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:04,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:04,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:04,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:46:04,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:46:04,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:04,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:04,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:04,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:46:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:04,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559983454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:04,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:04,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:04,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090906601] [2021-06-05 23:46:04,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:04,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:04,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:04,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:04,479 INFO L87 Difference]: Start difference. First operand 38801 states and 160965 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:05,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:05,967 INFO L93 Difference]: Finished difference Result 67639 states and 276715 transitions. [2021-06-05 23:46:05,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:46:05,968 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:05,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:06,201 INFO L225 Difference]: With dead ends: 67639 [2021-06-05 23:46:06,202 INFO L226 Difference]: Without dead ends: 67391 [2021-06-05 23:46:06,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1022.4ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:46:06,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67391 states. [2021-06-05 23:46:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67391 to 38987. [2021-06-05 23:46:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38987 states, 38986 states have (on average 4.1467449853793665) internal successors, (161665), 38986 states have internal predecessors, (161665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38987 states to 38987 states and 161665 transitions. [2021-06-05 23:46:07,458 INFO L78 Accepts]: Start accepts. Automaton has 38987 states and 161665 transitions. Word has length 39 [2021-06-05 23:46:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:07,458 INFO L482 AbstractCegarLoop]: Abstraction has 38987 states and 161665 transitions. [2021-06-05 23:46:07,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 38987 states and 161665 transitions. [2021-06-05 23:46:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:07,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:07,548 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:07,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:07,765 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1373542401, now seen corresponding path program 62 times [2021-06-05 23:46:07,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:07,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819946810] [2021-06-05 23:46:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:08,072 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-06-05 23:46:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:08,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:08,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819946810] [2021-06-05 23:46:08,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819946810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:08,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551396582] [2021-06-05 23:46:08,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:08,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:08,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:08,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:08,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:08,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:46:08,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:08,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:08,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:08,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:46:08,590 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:08,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:46:08,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:08,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:08,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:08,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:46:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:08,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551396582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:08,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:08,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:08,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216647409] [2021-06-05 23:46:08,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:08,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:08,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:08,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:08,634 INFO L87 Difference]: Start difference. First operand 38987 states and 161665 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:10,585 INFO L93 Difference]: Finished difference Result 84960 states and 345904 transitions. [2021-06-05 23:46:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:46:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:10,865 INFO L225 Difference]: With dead ends: 84960 [2021-06-05 23:46:10,866 INFO L226 Difference]: Without dead ends: 84808 [2021-06-05 23:46:10,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1246.1ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:46:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84808 states. [2021-06-05 23:46:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84808 to 38969. [2021-06-05 23:46:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38969 states, 38968 states have (on average 4.147736604393349) internal successors, (161629), 38968 states have internal predecessors, (161629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38969 states to 38969 states and 161629 transitions. [2021-06-05 23:46:12,130 INFO L78 Accepts]: Start accepts. Automaton has 38969 states and 161629 transitions. Word has length 39 [2021-06-05 23:46:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:12,130 INFO L482 AbstractCegarLoop]: Abstraction has 38969 states and 161629 transitions. [2021-06-05 23:46:12,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 38969 states and 161629 transitions. [2021-06-05 23:46:12,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:12,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:12,217 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:12,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2021-06-05 23:46:12,419 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1169621655, now seen corresponding path program 63 times [2021-06-05 23:46:12,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:12,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387046876] [2021-06-05 23:46:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:12,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:12,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387046876] [2021-06-05 23:46:12,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387046876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:12,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343128857] [2021-06-05 23:46:12,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:12,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:46:12,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:46:12,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:12,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 23:46:12,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:12,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:12,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:12,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2021-06-05 23:46:13,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:13,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:13,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 23:46:13,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:13,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:13,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:13,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-06-05 23:46:13,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:13,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:46:13,085 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:13,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:13,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:13,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:46:13,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:13,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:13,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:13,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 23:46:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:13,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343128857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:13,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:13,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:46:13,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155731006] [2021-06-05 23:46:13,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:46:13,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:46:13,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:46:13,212 INFO L87 Difference]: Start difference. First operand 38969 states and 161629 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:16,856 INFO L93 Difference]: Finished difference Result 76091 states and 310256 transitions. [2021-06-05 23:46:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:46:16,857 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:17,117 INFO L225 Difference]: With dead ends: 76091 [2021-06-05 23:46:17,117 INFO L226 Difference]: Without dead ends: 75900 [2021-06-05 23:46:17,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 2296.5ms TimeCoverageRelationStatistics Valid=813, Invalid=3219, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:46:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75900 states. [2021-06-05 23:46:18,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75900 to 39177. [2021-06-05 23:46:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39177 states, 39176 states have (on average 4.147488258117215) internal successors, (162482), 39176 states have internal predecessors, (162482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39177 states to 39177 states and 162482 transitions. [2021-06-05 23:46:18,477 INFO L78 Accepts]: Start accepts. Automaton has 39177 states and 162482 transitions. Word has length 39 [2021-06-05 23:46:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:18,477 INFO L482 AbstractCegarLoop]: Abstraction has 39177 states and 162482 transitions. [2021-06-05 23:46:18,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 39177 states and 162482 transitions. [2021-06-05 23:46:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:18,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:18,567 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:18,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:18,767 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash -532350717, now seen corresponding path program 64 times [2021-06-05 23:46:18,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:18,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106682266] [2021-06-05 23:46:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:19,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:19,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106682266] [2021-06-05 23:46:19,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106682266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:19,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111353327] [2021-06-05 23:46:19,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:19,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:19,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:19,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:19,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:46:19,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:19,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:19,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:19,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:46:19,345 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:19,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:46:19,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:19,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:19,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:19,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:46:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:19,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111353327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:19,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:19,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:19,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703376634] [2021-06-05 23:46:19,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:19,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:19,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:19,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:19,389 INFO L87 Difference]: Start difference. First operand 39177 states and 162482 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:21,615 INFO L93 Difference]: Finished difference Result 85490 states and 348598 transitions. [2021-06-05 23:46:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:46:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:21,889 INFO L225 Difference]: With dead ends: 85490 [2021-06-05 23:46:21,889 INFO L226 Difference]: Without dead ends: 85416 [2021-06-05 23:46:21,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1095.0ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:46:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85416 states. [2021-06-05 23:46:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85416 to 38765. [2021-06-05 23:46:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38765 states, 38764 states have (on average 4.149133216386338) internal successors, (160837), 38764 states have internal predecessors, (160837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38765 states to 38765 states and 160837 transitions. [2021-06-05 23:46:23,273 INFO L78 Accepts]: Start accepts. Automaton has 38765 states and 160837 transitions. Word has length 39 [2021-06-05 23:46:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:23,273 INFO L482 AbstractCegarLoop]: Abstraction has 38765 states and 160837 transitions. [2021-06-05 23:46:23,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 38765 states and 160837 transitions. [2021-06-05 23:46:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:23,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:23,361 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:23,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:23,562 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:23,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:23,562 INFO L82 PathProgramCache]: Analyzing trace with hash -912086607, now seen corresponding path program 65 times [2021-06-05 23:46:23,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:23,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807802508] [2021-06-05 23:46:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:23,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807802508] [2021-06-05 23:46:23,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807802508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:23,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034950793] [2021-06-05 23:46:23,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:23,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:46:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:46:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:24,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:24,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:24,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:24,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:24,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 23:46:24,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:24,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:24,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:24,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:46 [2021-06-05 23:46:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:24,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:24,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:46:24,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:24,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:24,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:24,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-06-05 23:46:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:24,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034950793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:24,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:24,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 23:46:24,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828098659] [2021-06-05 23:46:24,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:46:24,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:24,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:46:24,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:46:24,454 INFO L87 Difference]: Start difference. First operand 38765 states and 160837 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:27,431 INFO L93 Difference]: Finished difference Result 63376 states and 258241 transitions. [2021-06-05 23:46:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:46:27,431 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 23:46:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:27,645 INFO L225 Difference]: With dead ends: 63376 [2021-06-05 23:46:27,645 INFO L226 Difference]: Without dead ends: 63321 [2021-06-05 23:46:27,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1961.5ms TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:46:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63321 states. [2021-06-05 23:46:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63321 to 39588. [2021-06-05 23:46:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39588 states, 39587 states have (on average 4.147093742895395) internal successors, (164171), 39587 states have internal predecessors, (164171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39588 states to 39588 states and 164171 transitions. [2021-06-05 23:46:28,895 INFO L78 Accepts]: Start accepts. Automaton has 39588 states and 164171 transitions. Word has length 39 [2021-06-05 23:46:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:28,895 INFO L482 AbstractCegarLoop]: Abstraction has 39588 states and 164171 transitions. [2021-06-05 23:46:28,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39588 states and 164171 transitions. [2021-06-05 23:46:28,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:28,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:28,984 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:29,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:29,184 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1022432867, now seen corresponding path program 66 times [2021-06-05 23:46:29,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:29,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084556262] [2021-06-05 23:46:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:29,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:29,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084556262] [2021-06-05 23:46:29,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084556262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:29,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915147528] [2021-06-05 23:46:29,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:29,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:46:29,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:29,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:46:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:29,724 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:29,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:46:29,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:29,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:29,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:29,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:46:29,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:29,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-06-05 23:46:29,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:29,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:29,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:29,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:47 [2021-06-05 23:46:30,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:30,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:30,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 25 [2021-06-05 23:46:30,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:30,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:46:30,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:30,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:30,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 9 treesize of output 14 [2021-06-05 23:46:30,138 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:30,202 INFO L628 ElimStorePlain]: treesize reduction 41, result has 67.2 percent of original size [2021-06-05 23:46:30,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:30,207 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:136, output treesize:66 [2021-06-05 23:46:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:30,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915147528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:30,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:30,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:46:30,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804776115] [2021-06-05 23:46:30,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:46:30,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:46:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:46:30,377 INFO L87 Difference]: Start difference. First operand 39588 states and 164171 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:31,196 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-06-05 23:46:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:34,339 INFO L93 Difference]: Finished difference Result 67595 states and 273831 transitions. [2021-06-05 23:46:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:46:34,339 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:34,572 INFO L225 Difference]: With dead ends: 67595 [2021-06-05 23:46:34,572 INFO L226 Difference]: Without dead ends: 67447 [2021-06-05 23:46:34,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2603.7ms TimeCoverageRelationStatistics Valid=694, Invalid=4418, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:46:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67447 states. [2021-06-05 23:46:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67447 to 39750. [2021-06-05 23:46:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39750 states, 39749 states have (on average 4.144632569372814) internal successors, (164745), 39749 states have internal predecessors, (164745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39750 states to 39750 states and 164745 transitions. [2021-06-05 23:46:35,854 INFO L78 Accepts]: Start accepts. Automaton has 39750 states and 164745 transitions. Word has length 39 [2021-06-05 23:46:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:35,854 INFO L482 AbstractCegarLoop]: Abstraction has 39750 states and 164745 transitions. [2021-06-05 23:46:35,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 39750 states and 164745 transitions. [2021-06-05 23:46:35,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:35,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:35,941 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:36,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 23:46:36,145 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:36,145 INFO L82 PathProgramCache]: Analyzing trace with hash -659404043, now seen corresponding path program 67 times [2021-06-05 23:46:36,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:36,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678542097] [2021-06-05 23:46:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:36,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678542097] [2021-06-05 23:46:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678542097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398080130] [2021-06-05 23:46:36,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:36,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:36,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:36,638 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:36,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:46:36,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:36,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:36,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:36,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:46:36,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:46:36,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:36,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:36,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:36,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:46:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:36,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398080130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:36,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:36,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:36,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641384387] [2021-06-05 23:46:36,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:36,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:36,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:36,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:36,760 INFO L87 Difference]: Start difference. First operand 39750 states and 164745 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:38,269 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 23:46:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:38,828 INFO L93 Difference]: Finished difference Result 86444 states and 351579 transitions. [2021-06-05 23:46:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:46:38,828 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:39,123 INFO L225 Difference]: With dead ends: 86444 [2021-06-05 23:46:39,123 INFO L226 Difference]: Without dead ends: 86228 [2021-06-05 23:46:39,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1430.7ms TimeCoverageRelationStatistics Valid=439, Invalid=2423, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:46:39,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86228 states. [2021-06-05 23:46:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86228 to 39544. [2021-06-05 23:46:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39544 states, 39543 states have (on average 4.147712616645171) internal successors, (164013), 39543 states have internal predecessors, (164013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39544 states to 39544 states and 164013 transitions. [2021-06-05 23:46:40,499 INFO L78 Accepts]: Start accepts. Automaton has 39544 states and 164013 transitions. Word has length 39 [2021-06-05 23:46:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:40,499 INFO L482 AbstractCegarLoop]: Abstraction has 39544 states and 164013 transitions. [2021-06-05 23:46:40,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39544 states and 164013 transitions. [2021-06-05 23:46:40,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:40,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:40,588 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:40,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 23:46:40,793 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:40,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1316741681, now seen corresponding path program 68 times [2021-06-05 23:46:40,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:40,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326227092] [2021-06-05 23:46:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:41,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:41,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326227092] [2021-06-05 23:46:41,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326227092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:41,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555291963] [2021-06-05 23:46:41,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:41,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:46:41,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:41,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:41,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:41,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:46:41,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:41,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:41,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:41,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:46:41,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:46:41,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:41,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:41,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:41,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:46:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:41,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555291963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:41,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:41,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:41,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86552938] [2021-06-05 23:46:41,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:41,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:41,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:41,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:41,337 INFO L87 Difference]: Start difference. First operand 39544 states and 164013 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:43,972 INFO L93 Difference]: Finished difference Result 98987 states and 403310 transitions. [2021-06-05 23:46:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:46:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:44,349 INFO L225 Difference]: With dead ends: 98987 [2021-06-05 23:46:44,349 INFO L226 Difference]: Without dead ends: 98932 [2021-06-05 23:46:44,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1441.4ms TimeCoverageRelationStatistics Valid=474, Invalid=2178, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:46:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98932 states. [2021-06-05 23:46:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98932 to 39435. [2021-06-05 23:46:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39435 states, 39434 states have (on average 4.146092204696455) internal successors, (163497), 39434 states have internal predecessors, (163497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39435 states to 39435 states and 163497 transitions. [2021-06-05 23:46:45,905 INFO L78 Accepts]: Start accepts. Automaton has 39435 states and 163497 transitions. Word has length 39 [2021-06-05 23:46:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:45,905 INFO L482 AbstractCegarLoop]: Abstraction has 39435 states and 163497 transitions. [2021-06-05 23:46:45,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 39435 states and 163497 transitions. [2021-06-05 23:46:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:45,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:45,991 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:46,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 23:46:46,192 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:46,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2069317459, now seen corresponding path program 69 times [2021-06-05 23:46:46,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:46,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996022683] [2021-06-05 23:46:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:46,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:46,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996022683] [2021-06-05 23:46:46,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996022683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:46,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276947430] [2021-06-05 23:46:46,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:46,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:46:46,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:46:46,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:46,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:46,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:46:46,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:46,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:60 [2021-06-05 23:46:46,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:46,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:46,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-06-05 23:46:46,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:46,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:46,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-06-05 23:46:46,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,842 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:46:46,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2021-06-05 23:46:46,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,852 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:46:46,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 23:46:46,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:46,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:46,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:46:46,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:221, output treesize:275 [2021-06-05 23:46:47,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:47,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:46:47,196 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:46:47,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:47,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:46:47,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:47,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:47,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:46:47,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:60 [2021-06-05 23:46:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:47,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276947430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:47,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:47,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:46:47,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244740304] [2021-06-05 23:46:47,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:46:47,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:46:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:46:47,321 INFO L87 Difference]: Start difference. First operand 39435 states and 163497 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:48,499 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 23:46:48,955 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 62 [2021-06-05 23:46:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:52,525 INFO L93 Difference]: Finished difference Result 70941 states and 289060 transitions. [2021-06-05 23:46:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:46:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:52,760 INFO L225 Difference]: With dead ends: 70941 [2021-06-05 23:46:52,761 INFO L226 Difference]: Without dead ends: 70859 [2021-06-05 23:46:52,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 3883.2ms TimeCoverageRelationStatistics Valid=786, Invalid=6524, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:46:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70859 states. [2021-06-05 23:46:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70859 to 40015. [2021-06-05 23:46:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40015 states, 40014 states have (on average 4.1440495826460735) internal successors, (165820), 40014 states have internal predecessors, (165820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:53,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40015 states to 40015 states and 165820 transitions. [2021-06-05 23:46:53,925 INFO L78 Accepts]: Start accepts. Automaton has 40015 states and 165820 transitions. Word has length 39 [2021-06-05 23:46:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:53,925 INFO L482 AbstractCegarLoop]: Abstraction has 40015 states and 165820 transitions. [2021-06-05 23:46:53,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 40015 states and 165820 transitions. [2021-06-05 23:46:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:54,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:54,014 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:54,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:54,231 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash -270359081, now seen corresponding path program 70 times [2021-06-05 23:46:54,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:54,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383185117] [2021-06-05 23:46:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:54,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:54,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383185117] [2021-06-05 23:46:54,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383185117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:54,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115600080] [2021-06-05 23:46:54,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:54,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:46:54,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:54,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:46:54,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:54,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:46:54,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:54,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:46:54,733 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:46:54,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-06-05 23:46:54,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:54,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:46:54,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:46:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:55,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115600080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:55,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:55,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:46:55,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282363278] [2021-06-05 23:46:55,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:46:55,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:55,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:46:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:46:55,037 INFO L87 Difference]: Start difference. First operand 40015 states and 165820 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:46:56,809 INFO L93 Difference]: Finished difference Result 79794 states and 328449 transitions. [2021-06-05 23:46:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:46:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:46:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:46:57,311 INFO L225 Difference]: With dead ends: 79794 [2021-06-05 23:46:57,311 INFO L226 Difference]: Without dead ends: 79739 [2021-06-05 23:46:57,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1066.9ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:46:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79739 states. [2021-06-05 23:46:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79739 to 40231. [2021-06-05 23:46:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40231 states, 40230 states have (on average 4.1465572955505845) internal successors, (166816), 40230 states have internal predecessors, (166816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40231 states to 40231 states and 166816 transitions. [2021-06-05 23:46:58,468 INFO L78 Accepts]: Start accepts. Automaton has 40231 states and 166816 transitions. Word has length 39 [2021-06-05 23:46:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:46:58,468 INFO L482 AbstractCegarLoop]: Abstraction has 40231 states and 166816 transitions. [2021-06-05 23:46:58,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 40231 states and 166816 transitions. [2021-06-05 23:46:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:46:58,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:46:58,837 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:46:59,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:59,038 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:46:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:46:59,039 INFO L82 PathProgramCache]: Analyzing trace with hash -235833293, now seen corresponding path program 71 times [2021-06-05 23:46:59,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:46:59,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587677557] [2021-06-05 23:46:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:46:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:46:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:59,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:46:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587677557] [2021-06-05 23:46:59,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587677557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:59,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007477338] [2021-06-05 23:46:59,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:46:59,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:46:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:46:59,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:46:59,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:46:59,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:59,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:46:59,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:59,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:59,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:46:59,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:63 [2021-06-05 23:47:00,304 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_145], 3=[v_prenex_146]} [2021-06-05 23:47:00,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:00,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 23:47:00,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:00,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:00,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:00,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 23:47:00,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:00,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:00,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:00,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 23:47:00,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:00,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:00,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:47:00,490 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:165, output treesize:88 [2021-06-05 23:47:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:00,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:00,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:47:00,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 8 [2021-06-05 23:47:00,639 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:00,671 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.5 percent of original size [2021-06-05 23:47:00,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:47:00,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:38 [2021-06-05 23:47:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:00,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007477338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:00,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:00,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:47:00,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901275441] [2021-06-05 23:47:00,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:47:00,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:00,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:47:00,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:47:00,763 INFO L87 Difference]: Start difference. First operand 40231 states and 166816 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:02,242 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 23:47:03,289 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-06-05 23:47:04,891 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 90 [2021-06-05 23:47:07,300 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-05 23:47:07,459 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-06-05 23:47:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:08,744 INFO L93 Difference]: Finished difference Result 89119 states and 363462 transitions. [2021-06-05 23:47:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:47:08,744 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:09,219 INFO L225 Difference]: With dead ends: 89119 [2021-06-05 23:47:09,220 INFO L226 Difference]: Without dead ends: 89009 [2021-06-05 23:47:09,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 5837.0ms TimeCoverageRelationStatistics Valid=1006, Invalid=7736, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 23:47:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89009 states. [2021-06-05 23:47:10,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89009 to 40878. [2021-06-05 23:47:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40878 states, 40877 states have (on average 4.149839763192015) internal successors, (169633), 40877 states have internal predecessors, (169633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40878 states to 40878 states and 169633 transitions. [2021-06-05 23:47:10,688 INFO L78 Accepts]: Start accepts. Automaton has 40878 states and 169633 transitions. Word has length 39 [2021-06-05 23:47:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:10,688 INFO L482 AbstractCegarLoop]: Abstraction has 40878 states and 169633 transitions. [2021-06-05 23:47:10,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 40878 states and 169633 transitions. [2021-06-05 23:47:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:10,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:10,777 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:10,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:10,985 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1287912465, now seen corresponding path program 72 times [2021-06-05 23:47:10,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:10,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952565468] [2021-06-05 23:47:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:11,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:11,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952565468] [2021-06-05 23:47:11,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952565468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:11,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757888547] [2021-06-05 23:47:11,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:11,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:47:11,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:11,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:47:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:11,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:47:11,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:11,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:11,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:11,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:47:11,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:11,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:47:11,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:11,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:11,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:11,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:47:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:11,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757888547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:11,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:11,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:47:11,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311740122] [2021-06-05 23:47:11,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:47:11,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:11,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:47:11,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:47:11,529 INFO L87 Difference]: Start difference. First operand 40878 states and 169633 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:47:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:13,485 INFO L93 Difference]: Finished difference Result 88255 states and 364108 transitions. [2021-06-05 23:47:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:47:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:47:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:13,787 INFO L225 Difference]: With dead ends: 88255 [2021-06-05 23:47:13,787 INFO L226 Difference]: Without dead ends: 88200 [2021-06-05 23:47:13,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:47:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88200 states. [2021-06-05 23:47:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88200 to 41106. [2021-06-05 23:47:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41106 states, 41105 states have (on average 4.151733365770587) internal successors, (170657), 41105 states have internal predecessors, (170657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41106 states to 41106 states and 170657 transitions. [2021-06-05 23:47:15,207 INFO L78 Accepts]: Start accepts. Automaton has 41106 states and 170657 transitions. Word has length 39 [2021-06-05 23:47:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:15,208 INFO L482 AbstractCegarLoop]: Abstraction has 41106 states and 170657 transitions. [2021-06-05 23:47:15,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:47:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 41106 states and 170657 transitions. [2021-06-05 23:47:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:15,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:15,298 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:15,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:15,499 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1951178861, now seen corresponding path program 73 times [2021-06-05 23:47:15,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:15,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411403005] [2021-06-05 23:47:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:15,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:15,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411403005] [2021-06-05 23:47:15,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411403005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:15,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337233642] [2021-06-05 23:47:15,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:47:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:15,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:47:15,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:15,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:15,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:15,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:47:16,005 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:47:16,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:16,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:16,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:16,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:47:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:16,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337233642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:16,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:16,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:47:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055466391] [2021-06-05 23:47:16,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:47:16,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:47:16,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:47:16,067 INFO L87 Difference]: Start difference. First operand 41106 states and 170657 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:19,011 INFO L93 Difference]: Finished difference Result 122533 states and 497811 transitions. [2021-06-05 23:47:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:47:19,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:19,461 INFO L225 Difference]: With dead ends: 122533 [2021-06-05 23:47:19,461 INFO L226 Difference]: Without dead ends: 122478 [2021-06-05 23:47:19,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1464.6ms TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:47:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122478 states. [2021-06-05 23:47:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122478 to 39543. [2021-06-05 23:47:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39543 states, 39542 states have (on average 4.1444539982803095) internal successors, (163880), 39542 states have internal predecessors, (163880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:21,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39543 states to 39543 states and 163880 transitions. [2021-06-05 23:47:21,182 INFO L78 Accepts]: Start accepts. Automaton has 39543 states and 163880 transitions. Word has length 39 [2021-06-05 23:47:21,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:21,182 INFO L482 AbstractCegarLoop]: Abstraction has 39543 states and 163880 transitions. [2021-06-05 23:47:21,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:21,183 INFO L276 IsEmpty]: Start isEmpty. Operand 39543 states and 163880 transitions. [2021-06-05 23:47:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:21,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:21,274 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:21,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 23:47:21,474 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:21,475 INFO L82 PathProgramCache]: Analyzing trace with hash 189101847, now seen corresponding path program 74 times [2021-06-05 23:47:21,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:21,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754228870] [2021-06-05 23:47:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:21,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:21,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754228870] [2021-06-05 23:47:21,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754228870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:21,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997445678] [2021-06-05 23:47:21,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:21,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:47:21,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:21,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:47:21,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:22,064 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:22,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 21 [2021-06-05 23:47:22,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:22,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:22,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:22,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:47:22,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:47:22,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:22,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:22,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:22,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:47:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:22,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997445678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:22,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:22,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:47:22,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643289123] [2021-06-05 23:47:22,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:47:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:47:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:47:22,145 INFO L87 Difference]: Start difference. First operand 39543 states and 163880 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:24,221 INFO L93 Difference]: Finished difference Result 72417 states and 295850 transitions. [2021-06-05 23:47:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:47:24,221 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:24,474 INFO L225 Difference]: With dead ends: 72417 [2021-06-05 23:47:24,475 INFO L226 Difference]: Without dead ends: 72169 [2021-06-05 23:47:24,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1096.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:47:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72169 states. [2021-06-05 23:47:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72169 to 39729. [2021-06-05 23:47:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39729 states, 39728 states have (on average 4.142670157068062) internal successors, (164580), 39728 states have internal predecessors, (164580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39729 states to 39729 states and 164580 transitions. [2021-06-05 23:47:25,829 INFO L78 Accepts]: Start accepts. Automaton has 39729 states and 164580 transitions. Word has length 39 [2021-06-05 23:47:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:25,830 INFO L482 AbstractCegarLoop]: Abstraction has 39729 states and 164580 transitions. [2021-06-05 23:47:25,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 39729 states and 164580 transitions. [2021-06-05 23:47:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:25,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:25,920 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 23:47:26,120 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2088779397, now seen corresponding path program 75 times [2021-06-05 23:47:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:26,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990177174] [2021-06-05 23:47:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:26,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990177174] [2021-06-05 23:47:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990177174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420778323] [2021-06-05 23:47:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:26,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:47:26,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:47:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:26,851 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 23:47:27,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:47:27,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:27,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:27,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:68 [2021-06-05 23:47:27,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 23:47:27,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:27,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 23:47:27,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:27,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-06-05 23:47:27,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:27,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:27,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 23:47:27,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:27,270 INFO L628 ElimStorePlain]: treesize reduction 67, result has 68.2 percent of original size [2021-06-05 23:47:27,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 23:47:27,284 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:241, output treesize:166 [2021-06-05 23:47:27,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:47:27,476 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:27,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:27,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:27,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-06-05 23:47:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420778323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:27,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:27,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 23:47:27,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464547740] [2021-06-05 23:47:27,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:47:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:47:27,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:47:27,592 INFO L87 Difference]: Start difference. First operand 39729 states and 164580 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:32,042 INFO L93 Difference]: Finished difference Result 79614 states and 321408 transitions. [2021-06-05 23:47:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:47:32,042 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:32,472 INFO L225 Difference]: With dead ends: 79614 [2021-06-05 23:47:32,472 INFO L226 Difference]: Without dead ends: 79324 [2021-06-05 23:47:32,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 3737.3ms TimeCoverageRelationStatistics Valid=1141, Invalid=5831, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:47:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79324 states. [2021-06-05 23:47:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79324 to 39675. [2021-06-05 23:47:33,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39675 states, 39674 states have (on average 4.143166809497404) internal successors, (164376), 39674 states have internal predecessors, (164376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39675 states to 39675 states and 164376 transitions. [2021-06-05 23:47:33,935 INFO L78 Accepts]: Start accepts. Automaton has 39675 states and 164376 transitions. Word has length 39 [2021-06-05 23:47:33,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:33,935 INFO L482 AbstractCegarLoop]: Abstraction has 39675 states and 164376 transitions. [2021-06-05 23:47:33,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 39675 states and 164376 transitions. [2021-06-05 23:47:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:34,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:34,030 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:34,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 23:47:34,231 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1884858651, now seen corresponding path program 76 times [2021-06-05 23:47:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:34,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801178188] [2021-06-05 23:47:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:34,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:34,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801178188] [2021-06-05 23:47:34,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801178188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:34,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340306109] [2021-06-05 23:47:34,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:34,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:47:34,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:47:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:34,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:47:34,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:34,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:34,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:34,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:47:34,785 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:34,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:47:34,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:34,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:34,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:34,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:47:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:34,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340306109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:34,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:34,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:47:34,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682704843] [2021-06-05 23:47:34,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:47:34,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:34,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:47:34,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:47:34,830 INFO L87 Difference]: Start difference. First operand 39675 states and 164376 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:36,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:36,594 INFO L93 Difference]: Finished difference Result 74558 states and 304587 transitions. [2021-06-05 23:47:36,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:47:36,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:36,866 INFO L225 Difference]: With dead ends: 74558 [2021-06-05 23:47:36,866 INFO L226 Difference]: Without dead ends: 74468 [2021-06-05 23:47:36,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 960.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:47:36,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74468 states. [2021-06-05 23:47:38,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74468 to 39791. [2021-06-05 23:47:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39791 states, 39790 states have (on average 4.143553656697662) internal successors, (164872), 39790 states have internal predecessors, (164872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39791 states to 39791 states and 164872 transitions. [2021-06-05 23:47:38,286 INFO L78 Accepts]: Start accepts. Automaton has 39791 states and 164872 transitions. Word has length 39 [2021-06-05 23:47:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:38,286 INFO L482 AbstractCegarLoop]: Abstraction has 39791 states and 164872 transitions. [2021-06-05 23:47:38,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:38,286 INFO L276 IsEmpty]: Start isEmpty. Operand 39791 states and 164872 transitions. [2021-06-05 23:47:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:38,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:38,377 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:38,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:38,577 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:38,578 INFO L82 PathProgramCache]: Analyzing trace with hash 278457189, now seen corresponding path program 77 times [2021-06-05 23:47:38,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:38,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958946895] [2021-06-05 23:47:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:38,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:38,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958946895] [2021-06-05 23:47:38,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958946895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:38,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625414071] [2021-06-05 23:47:38,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:38,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:47:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:38,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:47:38,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:39,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:39,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:47:39,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:39,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:39,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:47:39,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:76 [2021-06-05 23:47:41,561 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_151], 6=[q1, v_prenex_149]} [2021-06-05 23:47:41,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-06-05 23:47:41,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:41,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-06-05 23:47:41,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:41,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 23:47:41,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 23:47:41,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:47:41,765 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:187, output treesize:101 [2021-06-05 23:47:41,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:47:41,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:47:41,958 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:41,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:41,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:41,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:47:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:42,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625414071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:42,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:42,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:47:42,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595327677] [2021-06-05 23:47:42,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:47:42,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:42,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:47:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=851, Unknown=1, NotChecked=0, Total=992 [2021-06-05 23:47:42,026 INFO L87 Difference]: Start difference. First operand 39791 states and 164872 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:44,105 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 76 [2021-06-05 23:47:45,103 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-05 23:47:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:52,079 INFO L93 Difference]: Finished difference Result 112936 states and 457086 transitions. [2021-06-05 23:47:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 23:47:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:52,481 INFO L225 Difference]: With dead ends: 112936 [2021-06-05 23:47:52,482 INFO L226 Difference]: Without dead ends: 112517 [2021-06-05 23:47:52,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3965 ImplicationChecksByTransitivity, 8391.1ms TimeCoverageRelationStatistics Valid=1684, Invalid=10747, Unknown=1, NotChecked=0, Total=12432 [2021-06-05 23:47:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112517 states. [2021-06-05 23:47:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112517 to 39606. [2021-06-05 23:47:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39606 states, 39605 states have (on average 4.143895972730716) internal successors, (164119), 39605 states have internal predecessors, (164119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:54,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39606 states to 39606 states and 164119 transitions. [2021-06-05 23:47:54,165 INFO L78 Accepts]: Start accepts. Automaton has 39606 states and 164119 transitions. Word has length 39 [2021-06-05 23:47:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:54,165 INFO L482 AbstractCegarLoop]: Abstraction has 39606 states and 164119 transitions. [2021-06-05 23:47:54,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 39606 states and 164119 transitions. [2021-06-05 23:47:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:54,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:54,255 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:54,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 23:47:54,456 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash -120548947, now seen corresponding path program 78 times [2021-06-05 23:47:54,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:54,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998584251] [2021-06-05 23:47:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:47:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:54,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:47:54,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998584251] [2021-06-05 23:47:54,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998584251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:54,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206146919] [2021-06-05 23:47:54,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:55,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:47:55,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:47:55,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:47:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:47:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:47:55,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:55,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:55,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:55,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-06-05 23:47:55,235 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:47:55,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-06-05 23:47:55,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:47:55,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:55,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:47:55,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 23:47:55,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:55,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:47:55,297 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:55,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:47:55,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:47:55,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:47:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:47:55,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206146919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:47:55,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:47:55,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:47:55,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116164905] [2021-06-05 23:47:55,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:47:55,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:47:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:47:55,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:47:55,341 INFO L87 Difference]: Start difference. First operand 39606 states and 164119 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:47:57,662 INFO L93 Difference]: Finished difference Result 95037 states and 391291 transitions. [2021-06-05 23:47:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:47:57,663 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:47:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:47:57,997 INFO L225 Difference]: With dead ends: 95037 [2021-06-05 23:47:57,997 INFO L226 Difference]: Without dead ends: 94982 [2021-06-05 23:47:57,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1119.6ms TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:47:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94982 states. [2021-06-05 23:47:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94982 to 41610. [2021-06-05 23:47:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41610 states, 41609 states have (on average 4.142036578624817) internal successors, (172346), 41609 states have internal predecessors, (172346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41610 states to 41610 states and 172346 transitions. [2021-06-05 23:47:59,509 INFO L78 Accepts]: Start accepts. Automaton has 41610 states and 172346 transitions. Word has length 39 [2021-06-05 23:47:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:47:59,509 INFO L482 AbstractCegarLoop]: Abstraction has 41610 states and 172346 transitions. [2021-06-05 23:47:59,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:47:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 41610 states and 172346 transitions. [2021-06-05 23:47:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:47:59,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:47:59,603 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:47:59,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:47:59,804 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:47:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:47:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash -758136977, now seen corresponding path program 79 times [2021-06-05 23:47:59,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:47:59,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596938836] [2021-06-05 23:47:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:47:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:00,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596938836] [2021-06-05 23:48:00,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596938836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305725172] [2021-06-05 23:48:00,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:00,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:48:00,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:00,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:00,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:00,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:00,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:00,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:48:00,311 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:00,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:48:00,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:00,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:00,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:00,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:48:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:00,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305725172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:00,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:00,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:48:00,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771451335] [2021-06-05 23:48:00,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:00,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:00,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:00,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:00,345 INFO L87 Difference]: Start difference. First operand 41610 states and 172346 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:02,285 INFO L93 Difference]: Finished difference Result 96288 states and 397003 transitions. [2021-06-05 23:48:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:48:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:02,615 INFO L225 Difference]: With dead ends: 96288 [2021-06-05 23:48:02,616 INFO L226 Difference]: Without dead ends: 96233 [2021-06-05 23:48:02,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 809.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:48:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96233 states. [2021-06-05 23:48:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96233 to 43341. [2021-06-05 23:48:04,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43341 states, 43340 states have (on average 4.144370096908168) internal successors, (179617), 43340 states have internal predecessors, (179617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43341 states to 43341 states and 179617 transitions. [2021-06-05 23:48:04,224 INFO L78 Accepts]: Start accepts. Automaton has 43341 states and 179617 transitions. Word has length 39 [2021-06-05 23:48:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:04,224 INFO L482 AbstractCegarLoop]: Abstraction has 43341 states and 179617 transitions. [2021-06-05 23:48:04,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 43341 states and 179617 transitions. [2021-06-05 23:48:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:04,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:04,321 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:04,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 23:48:04,522 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:04,523 INFO L82 PathProgramCache]: Analyzing trace with hash 660856047, now seen corresponding path program 80 times [2021-06-05 23:48:04,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:04,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919440552] [2021-06-05 23:48:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:04,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:04,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919440552] [2021-06-05 23:48:04,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919440552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:04,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30002488] [2021-06-05 23:48:04,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:04,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:48:04,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:04,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:48:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:05,302 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 23:48:05,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:05,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:05,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:05,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:05,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:48:05,481 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:05,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:48:05,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:05,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:05,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:05,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:48:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:05,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30002488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:05,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:05,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:48:05,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594013743] [2021-06-05 23:48:05,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:05,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:05,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:05,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:05,518 INFO L87 Difference]: Start difference. First operand 43341 states and 179617 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:48:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:07,429 INFO L93 Difference]: Finished difference Result 92890 states and 382937 transitions. [2021-06-05 23:48:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:48:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:48:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:08,042 INFO L225 Difference]: With dead ends: 92890 [2021-06-05 23:48:08,042 INFO L226 Difference]: Without dead ends: 92835 [2021-06-05 23:48:08,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1281.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:48:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92835 states. [2021-06-05 23:48:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92835 to 43305. [2021-06-05 23:48:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43305 states, 43304 states have (on average 4.144443931276556) internal successors, (179471), 43304 states have internal predecessors, (179471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43305 states to 43305 states and 179471 transitions. [2021-06-05 23:48:09,613 INFO L78 Accepts]: Start accepts. Automaton has 43305 states and 179471 transitions. Word has length 39 [2021-06-05 23:48:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:09,613 INFO L482 AbstractCegarLoop]: Abstraction has 43305 states and 179471 transitions. [2021-06-05 23:48:09,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:48:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 43305 states and 179471 transitions. [2021-06-05 23:48:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:09,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:09,711 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:09,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 23:48:09,911 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:09,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1354477999, now seen corresponding path program 81 times [2021-06-05 23:48:09,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:09,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172810386] [2021-06-05 23:48:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:10,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:10,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172810386] [2021-06-05 23:48:10,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172810386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:10,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446431621] [2021-06-05 23:48:10,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:10,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:48:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 23:48:10,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:10,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:10,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:48:10,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:10,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:10,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:10,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:61 [2021-06-05 23:48:10,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:10,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:10,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:10,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 23:48:10,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:10,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:10,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-06-05 23:48:10,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:10,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:10,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 23:48:10,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:10,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:10,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:48:10,653 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:161, output treesize:62 [2021-06-05 23:48:10,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:10,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:48:10,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:10,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:10,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:10,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:48:10,788 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:10,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:10,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:48:10,812 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:60 [2021-06-05 23:48:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:10,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446431621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:10,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:10,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:48:10,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481358592] [2021-06-05 23:48:10,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:48:10,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:48:10,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:48:10,885 INFO L87 Difference]: Start difference. First operand 43305 states and 179471 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:14,825 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 23:48:15,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:15,478 INFO L93 Difference]: Finished difference Result 84587 states and 346686 transitions. [2021-06-05 23:48:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:48:15,479 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:15,764 INFO L225 Difference]: With dead ends: 84587 [2021-06-05 23:48:15,764 INFO L226 Difference]: Without dead ends: 84505 [2021-06-05 23:48:15,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 2831.3ms TimeCoverageRelationStatistics Valid=555, Invalid=4701, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:48:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84505 states. [2021-06-05 23:48:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84505 to 43745. [2021-06-05 23:48:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43745 states, 43744 states have (on average 4.1367273226042425) internal successors, (180957), 43744 states have internal predecessors, (180957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43745 states to 43745 states and 180957 transitions. [2021-06-05 23:48:17,155 INFO L78 Accepts]: Start accepts. Automaton has 43745 states and 180957 transitions. Word has length 39 [2021-06-05 23:48:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:17,155 INFO L482 AbstractCegarLoop]: Abstraction has 43745 states and 180957 transitions. [2021-06-05 23:48:17,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 43745 states and 180957 transitions. [2021-06-05 23:48:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:17,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:17,253 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:17,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-06-05 23:48:17,453 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1521496273, now seen corresponding path program 82 times [2021-06-05 23:48:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:17,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721961673] [2021-06-05 23:48:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:17,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:17,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721961673] [2021-06-05 23:48:17,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721961673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:17,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244074394] [2021-06-05 23:48:17,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:17,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:48:17,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:17,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:48:17,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:17,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:17,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:17,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:17,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:17,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:48:17,940 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:17,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:48:17,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:17,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:17,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:17,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:48:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:17,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244074394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:17,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:17,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:48:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975233951] [2021-06-05 23:48:17,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:48:17,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:48:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:48:17,973 INFO L87 Difference]: Start difference. First operand 43745 states and 180957 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:48:18,742 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-06-05 23:48:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:20,166 INFO L93 Difference]: Finished difference Result 94187 states and 388377 transitions. [2021-06-05 23:48:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:48:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:48:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:20,494 INFO L225 Difference]: With dead ends: 94187 [2021-06-05 23:48:20,494 INFO L226 Difference]: Without dead ends: 94132 [2021-06-05 23:48:20,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 998.8ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:48:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94132 states. [2021-06-05 23:48:21,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94132 to 44373. [2021-06-05 23:48:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44373 states, 44372 states have (on average 4.139750292977554) internal successors, (183689), 44372 states have internal predecessors, (183689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44373 states to 44373 states and 183689 transitions. [2021-06-05 23:48:22,343 INFO L78 Accepts]: Start accepts. Automaton has 44373 states and 183689 transitions. Word has length 39 [2021-06-05 23:48:22,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:22,343 INFO L482 AbstractCegarLoop]: Abstraction has 44373 states and 183689 transitions. [2021-06-05 23:48:22,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 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 23:48:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 44373 states and 183689 transitions. [2021-06-05 23:48:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:22,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:22,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:22,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:22,658 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash -855789521, now seen corresponding path program 83 times [2021-06-05 23:48:22,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:22,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845590069] [2021-06-05 23:48:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:22,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:22,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:22,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845590069] [2021-06-05 23:48:22,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845590069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:22,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26938977] [2021-06-05 23:48:22,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:22,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:48:22,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:48:22,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:23,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:23,159 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 39 treesize of output 55 [2021-06-05 23:48:23,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:23,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:23,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:48:23,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:196 [2021-06-05 23:48:25,966 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-05 23:48:26,720 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 23:48:27,588 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2021-06-05 23:48:27,797 INFO L446 ElimStorePlain]: Different costs {3=[q2, v_prenex_260, v_prenex_250, v_prenex_240, v_prenex_254, v_prenex_244, v_prenex_256, v_prenex_248], 6=[v_prenex_252, v_prenex_242, v_prenex_246, v_prenex_258, v_prenex_238]} [2021-06-05 23:48:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:27,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:27,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2021-06-05 23:48:27,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:28,223 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 244 [2021-06-05 23:48:28,224 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.3 percent of original size [2021-06-05 23:48:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:28,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:28,432 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2021-06-05 23:48:28,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:28,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:28,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:28,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:28,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:28,635 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 224 [2021-06-05 23:48:28,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:28,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:28,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:28,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:28,835 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2021-06-05 23:48:28,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:28,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:28,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:28,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:28,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:28,849 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:29,020 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2021-06-05 23:48:29,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:29,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2021-06-05 23:48:29,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:29,196 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-06-05 23:48:29,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:29,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:29,210 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:29,366 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-05 23:48:29,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:29,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:48:29,380 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:29,529 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 23:48:29,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 23:48:29,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:29,688 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:48:29,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:29,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-06-05 23:48:29,701 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:29,835 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 23:48:29,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:29,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:29,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 23:48:29,849 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:30,026 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 23:48:30,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:30,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:30,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-06-05 23:48:30,044 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:30,165 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 23:48:30,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:30,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:30,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:30,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2021-06-05 23:48:30,177 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:30,291 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 23:48:30,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:30,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 26 dim-0 vars, 13 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 23:48:30,303 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 39 variables, input treesize:684, output treesize:263 [2021-06-05 23:48:30,618 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_262, v_prenex_263], 3=[q1, v_prenex_265], 6=[v_prenex_264, v_prenex_266, v_prenex_267]} [2021-06-05 23:48:30,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:48:30,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:30,821 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-06-05 23:48:30,821 INFO L628 ElimStorePlain]: treesize reduction 42, result has 88.2 percent of original size [2021-06-05 23:48:30,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:48:30,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:30,981 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-06-05 23:48:30,981 INFO L628 ElimStorePlain]: treesize reduction 33, result has 89.1 percent of original size [2021-06-05 23:48:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:30,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:30,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 23:48:31,000 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:31,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:31,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:31,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:31,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-06-05 23:48:31,090 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:31,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:31,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:31,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:31,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:31,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:31,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2021-06-05 23:48:31,180 INFO L550 ElimStorePlain]: Start of recursive call 6: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:31,269 INFO L628 ElimStorePlain]: treesize reduction 88, result has 58.5 percent of original size [2021-06-05 23:48:31,270 INFO L518 ElimStorePlain]: Eliminatee v_prenex_266 vanished before elimination [2021-06-05 23:48:31,270 INFO L518 ElimStorePlain]: Eliminatee v_prenex_267 vanished before elimination [2021-06-05 23:48:31,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 7 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 23:48:31,286 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:367, output treesize:119 [2021-06-05 23:48:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:31,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26938977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:31,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:31,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:48:31,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488413658] [2021-06-05 23:48:31,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:48:31,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:48:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=820, Unknown=1, NotChecked=0, Total=930 [2021-06-05 23:48:31,417 INFO L87 Difference]: Start difference. First operand 44373 states and 183689 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:32,939 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-06-05 23:48:33,533 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 56 [2021-06-05 23:48:34,022 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-05 23:48:34,684 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-05 23:48:35,021 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 23:48:35,215 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2021-06-05 23:48:37,570 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 256 DAG size of output: 249 [2021-06-05 23:48:38,519 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-06-05 23:48:38,767 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 23:48:39,066 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 23:48:40,959 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 23:48:42,115 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2021-06-05 23:48:42,446 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-06-05 23:48:43,026 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 23:48:44,913 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 223 DAG size of output: 216 [2021-06-05 23:48:45,262 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 23:48:46,117 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2021-06-05 23:48:47,561 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 214 DAG size of output: 214 [2021-06-05 23:48:48,199 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-05 23:48:48,728 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-05 23:48:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:49,189 INFO L93 Difference]: Finished difference Result 73715 states and 299870 transitions. [2021-06-05 23:48:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:48:49,190 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:49,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:49,445 INFO L225 Difference]: With dead ends: 73715 [2021-06-05 23:48:49,445 INFO L226 Difference]: Without dead ends: 73566 [2021-06-05 23:48:49,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 18542.9ms TimeCoverageRelationStatistics Valid=1071, Invalid=7118, Unknown=1, NotChecked=0, Total=8190 [2021-06-05 23:48:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73566 states. [2021-06-05 23:48:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73566 to 44813. [2021-06-05 23:48:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44813 states, 44812 states have (on average 4.13773096492011) internal successors, (185420), 44812 states have internal predecessors, (185420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44813 states to 44813 states and 185420 transitions. [2021-06-05 23:48:50,722 INFO L78 Accepts]: Start accepts. Automaton has 44813 states and 185420 transitions. Word has length 39 [2021-06-05 23:48:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:50,723 INFO L482 AbstractCegarLoop]: Abstraction has 44813 states and 185420 transitions. [2021-06-05 23:48:50,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 44813 states and 185420 transitions. [2021-06-05 23:48:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:50,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:50,825 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:51,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 23:48:51,026 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1950641299, now seen corresponding path program 84 times [2021-06-05 23:48:51,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:51,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617654651] [2021-06-05 23:48:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:51,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617654651] [2021-06-05 23:48:51,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617654651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759895510] [2021-06-05 23:48:51,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:51,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:48:51,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:48:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:48:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:51,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:48:51,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:48:51,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:51,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:51,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:51,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:51,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:31 [2021-06-05 23:48:51,651 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:51,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-06-05 23:48:51,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:51,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:51,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:51,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-06-05 23:48:51,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:51,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:48:51,704 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:51,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:51,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:48:51,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:48:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:51,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759895510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:51,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:51,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:48:51,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860674811] [2021-06-05 23:48:51,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:48:51,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:48:51,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:48:51,758 INFO L87 Difference]: Start difference. First operand 44813 states and 185420 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:48:55,347 INFO L93 Difference]: Finished difference Result 117265 states and 472560 transitions. [2021-06-05 23:48:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:48:55,347 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:48:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:48:55,759 INFO L225 Difference]: With dead ends: 117265 [2021-06-05 23:48:55,760 INFO L226 Difference]: Without dead ends: 117151 [2021-06-05 23:48:55,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 2261.5ms TimeCoverageRelationStatistics Valid=948, Invalid=4164, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:48:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117151 states. [2021-06-05 23:48:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117151 to 44829. [2021-06-05 23:48:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44829 states, 44828 states have (on average 4.140425626840368) internal successors, (185607), 44828 states have internal predecessors, (185607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44829 states to 44829 states and 185607 transitions. [2021-06-05 23:48:57,500 INFO L78 Accepts]: Start accepts. Automaton has 44829 states and 185607 transitions. Word has length 39 [2021-06-05 23:48:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:48:57,500 INFO L482 AbstractCegarLoop]: Abstraction has 44829 states and 185607 transitions. [2021-06-05 23:48:57,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:48:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 44829 states and 185607 transitions. [2021-06-05 23:48:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:48:57,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:48:57,581 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:48:57,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:57,782 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:48:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:48:57,782 INFO L82 PathProgramCache]: Analyzing trace with hash 281177201, now seen corresponding path program 85 times [2021-06-05 23:48:57,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:48:57,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296797631] [2021-06-05 23:48:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:48:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:58,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:48:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296797631] [2021-06-05 23:48:58,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296797631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562410045] [2021-06-05 23:48:58,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:48:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:48:58,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:48:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:48:58,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:48:58,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:58,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:58,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:58,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:48:58,281 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:48:58,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:48:58,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:48:58,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:48:58,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:48:58,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:48:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:48:58,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562410045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:48:58,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:48:58,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:48:58,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628557797] [2021-06-05 23:48:58,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:48:58,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:48:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:48:58,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:48:58,323 INFO L87 Difference]: Start difference. First operand 44829 states and 185607 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:00,944 INFO L93 Difference]: Finished difference Result 88334 states and 362591 transitions. [2021-06-05 23:49:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:49:00,945 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:01,781 INFO L225 Difference]: With dead ends: 88334 [2021-06-05 23:49:01,781 INFO L226 Difference]: Without dead ends: 88279 [2021-06-05 23:49:01,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 838.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:49:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88279 states. [2021-06-05 23:49:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88279 to 44537. [2021-06-05 23:49:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44537 states, 44536 states have (on average 4.1395500269444945) internal successors, (184359), 44536 states have internal predecessors, (184359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44537 states to 44537 states and 184359 transitions. [2021-06-05 23:49:03,195 INFO L78 Accepts]: Start accepts. Automaton has 44537 states and 184359 transitions. Word has length 39 [2021-06-05 23:49:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:03,195 INFO L482 AbstractCegarLoop]: Abstraction has 44537 states and 184359 transitions. [2021-06-05 23:49:03,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 44537 states and 184359 transitions. [2021-06-05 23:49:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:03,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:03,294 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:03,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:03,495 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:03,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:03,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2070849197, now seen corresponding path program 86 times [2021-06-05 23:49:03,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:03,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297758055] [2021-06-05 23:49:03,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:03,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:03,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297758055] [2021-06-05 23:49:03,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297758055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:03,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400997617] [2021-06-05 23:49:03,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:03,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:04,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:04,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:49:04,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:04,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:04,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:04,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:49:04,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:49:04,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:04,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:04,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:04,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:49:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:04,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400997617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:04,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:04,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:04,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683518486] [2021-06-05 23:49:04,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:04,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:04,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:04,143 INFO L87 Difference]: Start difference. First operand 44537 states and 184359 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:06,141 INFO L93 Difference]: Finished difference Result 78151 states and 319515 transitions. [2021-06-05 23:49:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:49:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:06,409 INFO L225 Difference]: With dead ends: 78151 [2021-06-05 23:49:06,409 INFO L226 Difference]: Without dead ends: 77903 [2021-06-05 23:49:06,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1200.9ms TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:49:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77903 states. [2021-06-05 23:49:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77903 to 44867. [2021-06-05 23:49:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44867 states, 44866 states have (on average 4.1367405162038065) internal successors, (185599), 44866 states have internal predecessors, (185599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44867 states to 44867 states and 185599 transitions. [2021-06-05 23:49:07,808 INFO L78 Accepts]: Start accepts. Automaton has 44867 states and 185599 transitions. Word has length 39 [2021-06-05 23:49:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:07,808 INFO L482 AbstractCegarLoop]: Abstraction has 44867 states and 185599 transitions. [2021-06-05 23:49:07,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 44867 states and 185599 transitions. [2021-06-05 23:49:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:07,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:07,910 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:08,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:08,111 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:08,111 INFO L82 PathProgramCache]: Analyzing trace with hash -53763145, now seen corresponding path program 87 times [2021-06-05 23:49:08,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:08,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133491582] [2021-06-05 23:49:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:08,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:08,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133491582] [2021-06-05 23:49:08,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133491582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:08,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664694094] [2021-06-05 23:49:08,430 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:08,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:49:08,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:49:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:08,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:08,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:49:08,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:08,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:08,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:08,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-06-05 23:49:09,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:09,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:09,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:49:09,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:09,151 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 23:49:09,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 23:49:09,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:09,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:09,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2021-06-05 23:49:09,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:09,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:09,177 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-06-05 23:49:09,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 1 [2021-06-05 23:49:09,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:09,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:09,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:49:09,229 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:249, output treesize:178 [2021-06-05 23:49:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:09,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664694094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:09,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:09,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:49:09,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521573253] [2021-06-05 23:49:09,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:49:09,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:09,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:49:09,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:49:09,467 INFO L87 Difference]: Start difference. First operand 44867 states and 185599 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:12,063 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 23:49:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:12,827 INFO L93 Difference]: Finished difference Result 84365 states and 341763 transitions. [2021-06-05 23:49:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:49:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:13,106 INFO L225 Difference]: With dead ends: 84365 [2021-06-05 23:49:13,106 INFO L226 Difference]: Without dead ends: 84075 [2021-06-05 23:49:13,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2442.2ms TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:49:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84075 states. [2021-06-05 23:49:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84075 to 44911. [2021-06-05 23:49:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44911 states, 44910 states have (on average 4.13669561344912) internal successors, (185779), 44910 states have internal predecessors, (185779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44911 states to 44911 states and 185779 transitions. [2021-06-05 23:49:14,503 INFO L78 Accepts]: Start accepts. Automaton has 44911 states and 185779 transitions. Word has length 39 [2021-06-05 23:49:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:14,503 INFO L482 AbstractCegarLoop]: Abstraction has 44911 states and 185779 transitions. [2021-06-05 23:49:14,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 44911 states and 185779 transitions. [2021-06-05 23:49:14,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:14,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:14,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:14,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 23:49:14,813 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:14,813 INFO L82 PathProgramCache]: Analyzing trace with hash 150157601, now seen corresponding path program 88 times [2021-06-05 23:49:14,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:14,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401534838] [2021-06-05 23:49:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:15,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:15,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401534838] [2021-06-05 23:49:15,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401534838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:15,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922920059] [2021-06-05 23:49:15,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:15,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:15,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:15,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:15,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:15,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:15,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:49:15,426 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:15,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:49:15,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:15,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:15,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:49:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:15,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922920059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:15,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:15,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:15,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029085804] [2021-06-05 23:49:15,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:15,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:15,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:15,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:15,470 INFO L87 Difference]: Start difference. First operand 44911 states and 185779 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:17,781 INFO L93 Difference]: Finished difference Result 80951 states and 330773 transitions. [2021-06-05 23:49:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:49:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:18,294 INFO L225 Difference]: With dead ends: 80951 [2021-06-05 23:49:18,294 INFO L226 Difference]: Without dead ends: 80845 [2021-06-05 23:49:18,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1248.5ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:49:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80845 states. [2021-06-05 23:49:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80845 to 45037. [2021-06-05 23:49:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45037 states, 45036 states have (on average 4.136890487609912) internal successors, (186309), 45036 states have internal predecessors, (186309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45037 states to 45037 states and 186309 transitions. [2021-06-05 23:49:19,740 INFO L78 Accepts]: Start accepts. Automaton has 45037 states and 186309 transitions. Word has length 39 [2021-06-05 23:49:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:19,740 INFO L482 AbstractCegarLoop]: Abstraction has 45037 states and 186309 transitions. [2021-06-05 23:49:19,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 45037 states and 186309 transitions. [2021-06-05 23:49:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:19,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:19,844 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:20,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable515 [2021-06-05 23:49:20,045 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1981493855, now seen corresponding path program 89 times [2021-06-05 23:49:20,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:20,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699278490] [2021-06-05 23:49:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:20,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:20,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699278490] [2021-06-05 23:49:20,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699278490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:20,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756467054] [2021-06-05 23:49:20,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:20,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:49:20,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:20,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:49:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:20,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:20,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:49:20,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:20,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:20,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:20,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:76 [2021-06-05 23:49:22,940 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_268], 6=[q1, v_prenex_270]} [2021-06-05 23:49:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:22,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:22,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-06-05 23:49:22,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:23,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:23,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-06-05 23:49:23,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:23,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:23,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-06-05 23:49:23,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 23:49:23,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:23,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:49:23,137 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:187, output treesize:101 [2021-06-05 23:49:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:23,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:23,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:49:23,323 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:23,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:23,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:23,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:49:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:23,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756467054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:23,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:23,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:49:23,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185719714] [2021-06-05 23:49:23,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:49:23,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:23,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:49:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=849, Unknown=1, NotChecked=0, Total=992 [2021-06-05 23:49:23,397 INFO L87 Difference]: Start difference. First operand 45037 states and 186309 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:24,780 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-06-05 23:49:25,136 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 76 [2021-06-05 23:49:25,921 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 23:49:31,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:31,866 INFO L93 Difference]: Finished difference Result 119711 states and 484334 transitions. [2021-06-05 23:49:31,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 23:49:31,866 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:32,236 INFO L225 Difference]: With dead ends: 119711 [2021-06-05 23:49:32,236 INFO L226 Difference]: Without dead ends: 119292 [2021-06-05 23:49:32,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 7622.9ms TimeCoverageRelationStatistics Valid=1622, Invalid=9933, Unknown=1, NotChecked=0, Total=11556 [2021-06-05 23:49:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119292 states. [2021-06-05 23:49:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119292 to 44830. [2021-06-05 23:49:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44830 states, 44829 states have (on average 4.1372772089495635) internal successors, (185470), 44829 states have internal predecessors, (185470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44830 states to 44830 states and 185470 transitions. [2021-06-05 23:49:33,896 INFO L78 Accepts]: Start accepts. Automaton has 44830 states and 185470 transitions. Word has length 39 [2021-06-05 23:49:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:33,897 INFO L482 AbstractCegarLoop]: Abstraction has 44830 states and 185470 transitions. [2021-06-05 23:49:33,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 44830 states and 185470 transitions. [2021-06-05 23:49:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:33,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:33,975 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:34,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:34,175 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash -564113161, now seen corresponding path program 90 times [2021-06-05 23:49:34,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:34,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624438320] [2021-06-05 23:49:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:34,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:34,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624438320] [2021-06-05 23:49:34,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624438320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:34,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211642351] [2021-06-05 23:49:34,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:34,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:49:34,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:34,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:49:34,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:34,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:34,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:34,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:34,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:34,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:49:34,717 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:34,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:49:34,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:34,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:34,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:34,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:49:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:34,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211642351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:34,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:34,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:34,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492818928] [2021-06-05 23:49:34,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:34,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:34,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:34,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:34,759 INFO L87 Difference]: Start difference. First operand 44830 states and 185470 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:35,197 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-06-05 23:49:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:37,585 INFO L93 Difference]: Finished difference Result 99220 states and 404491 transitions. [2021-06-05 23:49:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:49:37,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:37,924 INFO L225 Difference]: With dead ends: 99220 [2021-06-05 23:49:37,924 INFO L226 Difference]: Without dead ends: 99052 [2021-06-05 23:49:37,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1430.6ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:49:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99052 states. [2021-06-05 23:49:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99052 to 44916. [2021-06-05 23:49:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44916 states, 44915 states have (on average 4.138439274184571) internal successors, (185878), 44915 states have internal predecessors, (185878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44916 states to 44916 states and 185878 transitions. [2021-06-05 23:49:39,553 INFO L78 Accepts]: Start accepts. Automaton has 44916 states and 185878 transitions. Word has length 39 [2021-06-05 23:49:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:39,553 INFO L482 AbstractCegarLoop]: Abstraction has 44916 states and 185878 transitions. [2021-06-05 23:49:39,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 44916 states and 185878 transitions. [2021-06-05 23:49:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:39,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:39,636 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:39,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 23:49:39,836 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash -838019273, now seen corresponding path program 91 times [2021-06-05 23:49:39,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:39,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679496095] [2021-06-05 23:49:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:40,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:40,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679496095] [2021-06-05 23:49:40,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679496095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:40,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377259458] [2021-06-05 23:49:40,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:40,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:40,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:40,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:40,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:40,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:40,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:40,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:49:40,387 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:40,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:49:40,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:40,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:40,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:40,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:49:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:40,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377259458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:40,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:40,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:40,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450518520] [2021-06-05 23:49:40,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:40,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:40,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:40,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:40,429 INFO L87 Difference]: Start difference. First operand 44916 states and 185878 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:42,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:42,633 INFO L93 Difference]: Finished difference Result 100872 states and 411383 transitions. [2021-06-05 23:49:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:49:42,634 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:42,948 INFO L225 Difference]: With dead ends: 100872 [2021-06-05 23:49:42,948 INFO L226 Difference]: Without dead ends: 100790 [2021-06-05 23:49:42,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1054.7ms TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:49:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100790 states. [2021-06-05 23:49:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100790 to 44850. [2021-06-05 23:49:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44850 states, 44849 states have (on average 4.138241655332338) internal successors, (185596), 44849 states have internal predecessors, (185596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44850 states to 44850 states and 185596 transitions. [2021-06-05 23:49:44,467 INFO L78 Accepts]: Start accepts. Automaton has 44850 states and 185596 transitions. Word has length 39 [2021-06-05 23:49:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:44,467 INFO L482 AbstractCegarLoop]: Abstraction has 44850 states and 185596 transitions. [2021-06-05 23:49:44,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 44850 states and 185596 transitions. [2021-06-05 23:49:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:44,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:44,871 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:45,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 23:49:45,077 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:45,077 INFO L82 PathProgramCache]: Analyzing trace with hash -648841051, now seen corresponding path program 92 times [2021-06-05 23:49:45,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:45,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485472452] [2021-06-05 23:49:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:45,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485472452] [2021-06-05 23:49:45,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485472452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501491498] [2021-06-05 23:49:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:45,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:45,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:45,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:45,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:49:45,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:45,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:45,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:45,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:49:45,577 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:45,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:49:45,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:45,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:45,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:45,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:49:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:45,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501491498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:45,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:45,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:45,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222577249] [2021-06-05 23:49:45,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:45,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:45,638 INFO L87 Difference]: Start difference. First operand 44850 states and 185596 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:47,500 INFO L93 Difference]: Finished difference Result 83406 states and 341091 transitions. [2021-06-05 23:49:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:49:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:47,761 INFO L225 Difference]: With dead ends: 83406 [2021-06-05 23:49:47,761 INFO L226 Difference]: Without dead ends: 83316 [2021-06-05 23:49:47,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 945.9ms TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:49:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83316 states. [2021-06-05 23:49:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83316 to 44954. [2021-06-05 23:49:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44954 states, 44953 states have (on average 4.138722665895491) internal successors, (186048), 44953 states have internal predecessors, (186048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44954 states to 44954 states and 186048 transitions. [2021-06-05 23:49:49,103 INFO L78 Accepts]: Start accepts. Automaton has 44954 states and 186048 transitions. Word has length 39 [2021-06-05 23:49:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:49,103 INFO L482 AbstractCegarLoop]: Abstraction has 44954 states and 186048 transitions. [2021-06-05 23:49:49,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 44954 states and 186048 transitions. [2021-06-05 23:49:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:49,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:49,184 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:49,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 23:49:49,384 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash -914563053, now seen corresponding path program 93 times [2021-06-05 23:49:49,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:49,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102164219] [2021-06-05 23:49:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:49,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:49,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102164219] [2021-06-05 23:49:49,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102164219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:49,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155179436] [2021-06-05 23:49:49,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:49,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:49:49,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:49:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:49,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:49,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:49:49,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:49,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:49,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:49,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:114 [2021-06-05 23:49:50,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:49:50,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:50,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:50,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:50,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:16 [2021-06-05 23:49:50,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:50,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:49:50,087 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:50,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:50,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:50,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-06-05 23:49:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:50,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155179436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:50,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:50,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:49:50,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323725636] [2021-06-05 23:49:50,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:49:50,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:50,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:49:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:49:50,112 INFO L87 Difference]: Start difference. First operand 44954 states and 186048 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:52,307 INFO L93 Difference]: Finished difference Result 71409 states and 291853 transitions. [2021-06-05 23:49:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:49:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:52,518 INFO L225 Difference]: With dead ends: 71409 [2021-06-05 23:49:52,518 INFO L226 Difference]: Without dead ends: 71281 [2021-06-05 23:49:52,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1225.0ms TimeCoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:49:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71281 states. [2021-06-05 23:49:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71281 to 45261. [2021-06-05 23:49:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45261 states, 45260 states have (on average 4.134843128590367) internal successors, (187143), 45260 states have internal predecessors, (187143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45261 states to 45261 states and 187143 transitions. [2021-06-05 23:49:53,674 INFO L78 Accepts]: Start accepts. Automaton has 45261 states and 187143 transitions. Word has length 39 [2021-06-05 23:49:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:53,675 INFO L482 AbstractCegarLoop]: Abstraction has 45261 states and 187143 transitions. [2021-06-05 23:49:53,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 45261 states and 187143 transitions. [2021-06-05 23:49:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:53,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:53,756 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:53,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 23:49:53,956 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1255743205, now seen corresponding path program 94 times [2021-06-05 23:49:53,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:53,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163522801] [2021-06-05 23:49:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:54,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163522801] [2021-06-05 23:49:54,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163522801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055876463] [2021-06-05 23:49:54,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:54,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:54,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:49:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:54,781 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:49:54,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:49:54,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:54,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:49:54,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:49:54,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:54,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:54,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:49:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:54,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055876463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:54,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:54,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:49:54,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002527051] [2021-06-05 23:49:54,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:49:54,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:54,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:49:54,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:54,898 INFO L87 Difference]: Start difference. First operand 45261 states and 187143 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:56,883 INFO L93 Difference]: Finished difference Result 88636 states and 360851 transitions. [2021-06-05 23:49:56,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:49:56,883 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:49:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:57,152 INFO L225 Difference]: With dead ends: 88636 [2021-06-05 23:49:57,152 INFO L226 Difference]: Without dead ends: 88452 [2021-06-05 23:49:57,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1353.2ms TimeCoverageRelationStatistics Valid=373, Invalid=1789, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:49:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88452 states. [2021-06-05 23:49:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88452 to 45006. [2021-06-05 23:49:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45006 states, 45005 states have (on average 4.137984668370181) internal successors, (186230), 45005 states have internal predecessors, (186230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45006 states to 45006 states and 186230 transitions. [2021-06-05 23:49:58,555 INFO L78 Accepts]: Start accepts. Automaton has 45006 states and 186230 transitions. Word has length 39 [2021-06-05 23:49:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:58,555 INFO L482 AbstractCegarLoop]: Abstraction has 45006 states and 186230 transitions. [2021-06-05 23:49:58,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 45006 states and 186230 transitions. [2021-06-05 23:49:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:49:58,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:58,640 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:58,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 23:49:58,845 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:58,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1235218985, now seen corresponding path program 95 times [2021-06-05 23:49:58,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:58,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477476175] [2021-06-05 23:49:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:59,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477476175] [2021-06-05 23:49:59,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477476175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509717099] [2021-06-05 23:49:59,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:59,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:49:59,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:59,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:49:59,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:59,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 49 [2021-06-05 23:49:59,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:52 [2021-06-05 23:49:59,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:49:59,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:59,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:49:59,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:59,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:59,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:59,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-06-05 23:49:59,658 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:59,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:49:59,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-06-05 23:49:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:59,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509717099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:59,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:49:59,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322127144] [2021-06-05 23:49:59,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:49:59,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:59,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:49:59,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:49:59,714 INFO L87 Difference]: Start difference. First operand 45006 states and 186230 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:00,788 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-06-05 23:50:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:03,480 INFO L93 Difference]: Finished difference Result 79241 states and 323769 transitions. [2021-06-05 23:50:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:50:03,480 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:03,734 INFO L225 Difference]: With dead ends: 79241 [2021-06-05 23:50:03,734 INFO L226 Difference]: Without dead ends: 78900 [2021-06-05 23:50:03,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2607.3ms TimeCoverageRelationStatistics Valid=793, Invalid=4177, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:50:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78900 states. [2021-06-05 23:50:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78900 to 45373. [2021-06-05 23:50:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45373 states, 45372 states have (on average 4.134466190602134) internal successors, (187589), 45372 states have internal predecessors, (187589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:05,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45373 states to 45373 states and 187589 transitions. [2021-06-05 23:50:05,091 INFO L78 Accepts]: Start accepts. Automaton has 45373 states and 187589 transitions. Word has length 39 [2021-06-05 23:50:05,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:05,091 INFO L482 AbstractCegarLoop]: Abstraction has 45373 states and 187589 transitions. [2021-06-05 23:50:05,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:05,091 INFO L276 IsEmpty]: Start isEmpty. Operand 45373 states and 187589 transitions. [2021-06-05 23:50:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:05,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:05,187 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:05,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:05,387 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:05,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1145435835, now seen corresponding path program 96 times [2021-06-05 23:50:05,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:05,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427418616] [2021-06-05 23:50:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:05,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427418616] [2021-06-05 23:50:05,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427418616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196397608] [2021-06-05 23:50:05,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:05,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:50:05,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:05,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:50:05,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:06,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:06,082 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 31 treesize of output 49 [2021-06-05 23:50:06,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:06,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:06,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:06,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:55 [2021-06-05 23:50:06,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:50:06,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:06,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 23:50:06,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:06,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:06,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 23:50:06,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:81, output treesize:25 [2021-06-05 23:50:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 23:50:06,267 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:06,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:06,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:06,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-06-05 23:50:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:06,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196397608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:06,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:06,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:50:06,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641606448] [2021-06-05 23:50:06,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:50:06,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:06,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:50:06,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:50:06,294 INFO L87 Difference]: Start difference. First operand 45373 states and 187589 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:09,776 INFO L93 Difference]: Finished difference Result 91924 states and 373158 transitions. [2021-06-05 23:50:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:50:09,776 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:10,274 INFO L225 Difference]: With dead ends: 91924 [2021-06-05 23:50:10,274 INFO L226 Difference]: Without dead ends: 91710 [2021-06-05 23:50:10,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2218.6ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:50:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91710 states. [2021-06-05 23:50:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91710 to 45192. [2021-06-05 23:50:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45192 states, 45191 states have (on average 4.136443097076851) internal successors, (186930), 45191 states have internal predecessors, (186930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45192 states to 45192 states and 186930 transitions. [2021-06-05 23:50:11,654 INFO L78 Accepts]: Start accepts. Automaton has 45192 states and 186930 transitions. Word has length 39 [2021-06-05 23:50:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:11,654 INFO L482 AbstractCegarLoop]: Abstraction has 45192 states and 186930 transitions. [2021-06-05 23:50:11,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 45192 states and 186930 transitions. [2021-06-05 23:50:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:11,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:11,747 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:11,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-05 23:50:11,947 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash 911518271, now seen corresponding path program 97 times [2021-06-05 23:50:11,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:11,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497457648] [2021-06-05 23:50:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:12,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:12,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497457648] [2021-06-05 23:50:12,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497457648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:12,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409164883] [2021-06-05 23:50:12,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:50:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:12,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:12,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:12,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:12,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:12,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:12,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:50:12,576 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:12,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:50:12,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:12,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:12,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:12,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:50:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:12,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409164883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:12,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:12,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:12,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397956010] [2021-06-05 23:50:12,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:12,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:12,618 INFO L87 Difference]: Start difference. First operand 45192 states and 186930 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:14,591 INFO L93 Difference]: Finished difference Result 92237 states and 375902 transitions. [2021-06-05 23:50:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:50:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:14,890 INFO L225 Difference]: With dead ends: 92237 [2021-06-05 23:50:14,890 INFO L226 Difference]: Without dead ends: 92085 [2021-06-05 23:50:14,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:50:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92085 states. [2021-06-05 23:50:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92085 to 45174. [2021-06-05 23:50:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45174 states, 45173 states have (on average 4.137294401523033) internal successors, (186894), 45173 states have internal predecessors, (186894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45174 states to 45174 states and 186894 transitions. [2021-06-05 23:50:16,365 INFO L78 Accepts]: Start accepts. Automaton has 45174 states and 186894 transitions. Word has length 39 [2021-06-05 23:50:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:16,365 INFO L482 AbstractCegarLoop]: Abstraction has 45174 states and 186894 transitions. [2021-06-05 23:50:16,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 45174 states and 186894 transitions. [2021-06-05 23:50:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:16,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:16,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:16,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:16,659 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:16,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1115439017, now seen corresponding path program 98 times [2021-06-05 23:50:16,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:16,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559291891] [2021-06-05 23:50:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:16,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:16,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559291891] [2021-06-05 23:50:16,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559291891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:16,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351557710] [2021-06-05 23:50:16,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:17,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:17,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:17,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:17,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:17,397 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 23:50:17,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:17,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:17,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:17,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:17,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:50:17,534 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:17,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:50:17,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:17,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:17,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:17,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:50:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:17,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351557710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:17,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:17,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:17,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859555609] [2021-06-05 23:50:17,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:17,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:17,583 INFO L87 Difference]: Start difference. First operand 45174 states and 186894 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:19,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:19,063 INFO L93 Difference]: Finished difference Result 78252 states and 319941 transitions. [2021-06-05 23:50:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:50:19,063 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:19,314 INFO L225 Difference]: With dead ends: 78252 [2021-06-05 23:50:19,314 INFO L226 Difference]: Without dead ends: 78162 [2021-06-05 23:50:19,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 922.4ms TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:50:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78162 states. [2021-06-05 23:50:20,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78162 to 44982. [2021-06-05 23:50:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44982 states, 44981 states have (on average 4.138325070585358) internal successors, (186146), 44981 states have internal predecessors, (186146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44982 states to 44982 states and 186146 transitions. [2021-06-05 23:50:20,815 INFO L78 Accepts]: Start accepts. Automaton has 44982 states and 186146 transitions. Word has length 39 [2021-06-05 23:50:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:20,815 INFO L482 AbstractCegarLoop]: Abstraction has 44982 states and 186146 transitions. [2021-06-05 23:50:20,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 44982 states and 186146 transitions. [2021-06-05 23:50:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:21,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:21,114 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:21,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 23:50:21,315 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:21,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash 314529513, now seen corresponding path program 99 times [2021-06-05 23:50:21,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:21,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026526981] [2021-06-05 23:50:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:21,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:21,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026526981] [2021-06-05 23:50:21,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026526981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:21,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574569478] [2021-06-05 23:50:21,638 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:21,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:50:21,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:50:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:21,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:21,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:21,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-06-05 23:50:21,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:21,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:103 [2021-06-05 23:50:21,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:21,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:21,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:21,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-06-05 23:50:22,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:22,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:50:22,011 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:22,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:22,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:22,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:50:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:22,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574569478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:22,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:22,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:50:22,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918897930] [2021-06-05 23:50:22,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:50:22,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:22,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:50:22,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:50:22,061 INFO L87 Difference]: Start difference. First operand 44982 states and 186146 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:24,966 INFO L93 Difference]: Finished difference Result 75380 states and 307072 transitions. [2021-06-05 23:50:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:50:24,966 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:25,182 INFO L225 Difference]: With dead ends: 75380 [2021-06-05 23:50:25,182 INFO L226 Difference]: Without dead ends: 75039 [2021-06-05 23:50:25,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1805.1ms TimeCoverageRelationStatistics Valid=574, Invalid=3208, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:50:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75039 states. [2021-06-05 23:50:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75039 to 45509. [2021-06-05 23:50:26,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45509 states, 45508 states have (on average 4.133361167267294) internal successors, (188101), 45508 states have internal predecessors, (188101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45509 states to 45509 states and 188101 transitions. [2021-06-05 23:50:26,409 INFO L78 Accepts]: Start accepts. Automaton has 45509 states and 188101 transitions. Word has length 39 [2021-06-05 23:50:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:26,409 INFO L482 AbstractCegarLoop]: Abstraction has 45509 states and 188101 transitions. [2021-06-05 23:50:26,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 45509 states and 188101 transitions. [2021-06-05 23:50:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:26,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:26,501 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:26,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 23:50:26,702 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 224746363, now seen corresponding path program 100 times [2021-06-05 23:50:26,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:26,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554569053] [2021-06-05 23:50:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:27,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:27,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554569053] [2021-06-05 23:50:27,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554569053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:27,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999404029] [2021-06-05 23:50:27,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:27,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:50:27,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:27,255 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:27,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 21 [2021-06-05 23:50:27,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:27,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:27,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:27,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 23:50:27,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:50:27,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:27,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:27,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:27,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:50:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:27,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999404029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:27,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:27,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:27,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971416865] [2021-06-05 23:50:27,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:27,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:27,338 INFO L87 Difference]: Start difference. First operand 45509 states and 188101 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:27,805 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 23:50:29,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:29,435 INFO L93 Difference]: Finished difference Result 90631 states and 368802 transitions. [2021-06-05 23:50:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:50:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:29,709 INFO L225 Difference]: With dead ends: 90631 [2021-06-05 23:50:29,709 INFO L226 Difference]: Without dead ends: 90463 [2021-06-05 23:50:29,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1406.7ms TimeCoverageRelationStatistics Valid=422, Invalid=2128, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:50:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90463 states. [2021-06-05 23:50:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90463 to 45312. [2021-06-05 23:50:30,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45312 states, 45311 states have (on average 4.135552073447949) internal successors, (187386), 45311 states have internal predecessors, (187386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45312 states to 45312 states and 187386 transitions. [2021-06-05 23:50:31,286 INFO L78 Accepts]: Start accepts. Automaton has 45312 states and 187386 transitions. Word has length 39 [2021-06-05 23:50:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:31,286 INFO L482 AbstractCegarLoop]: Abstraction has 45312 states and 187386 transitions. [2021-06-05 23:50:31,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 45312 states and 187386 transitions. [2021-06-05 23:50:31,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:31,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:31,370 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:31,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 23:50:31,570 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:31,571 INFO L82 PathProgramCache]: Analyzing trace with hash -9171201, now seen corresponding path program 101 times [2021-06-05 23:50:31,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:31,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246544944] [2021-06-05 23:50:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:31,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:31,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246544944] [2021-06-05 23:50:31,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246544944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:31,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393402320] [2021-06-05 23:50:31,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:31,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:50:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:32,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:32,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 23:50:32,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:32,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:32,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:32,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:67 [2021-06-05 23:50:32,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:32,486 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 33 treesize of output 51 [2021-06-05 23:50:32,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:32,510 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 23:50:32,510 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 31 treesize of output 37 [2021-06-05 23:50:32,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:32,519 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 23:50:32,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-06-05 23:50:32,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:32,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:32,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:50:32,586 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:162, output treesize:86 [2021-06-05 23:50:32,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:32,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 23:50:32,700 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:32,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:32,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:32,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-06-05 23:50:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:32,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393402320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:32,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:32,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:50:32,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739219637] [2021-06-05 23:50:32,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:50:32,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:32,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:50:32,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:50:32,754 INFO L87 Difference]: Start difference. First operand 45312 states and 187386 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:33,535 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-06-05 23:50:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:39,249 INFO L93 Difference]: Finished difference Result 112135 states and 454034 transitions. [2021-06-05 23:50:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:50:39,249 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:39,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:39,606 INFO L225 Difference]: With dead ends: 112135 [2021-06-05 23:50:39,607 INFO L226 Difference]: Without dead ends: 111652 [2021-06-05 23:50:39,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 4464.2ms TimeCoverageRelationStatistics Valid=1325, Invalid=8377, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:50:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111652 states. [2021-06-05 23:50:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111652 to 45461. [2021-06-05 23:50:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45461 states, 45460 states have (on average 4.1344258688957325) internal successors, (187951), 45460 states have internal predecessors, (187951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45461 states to 45461 states and 187951 transitions. [2021-06-05 23:50:41,473 INFO L78 Accepts]: Start accepts. Automaton has 45461 states and 187951 transitions. Word has length 39 [2021-06-05 23:50:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:41,473 INFO L482 AbstractCegarLoop]: Abstraction has 45461 states and 187951 transitions. [2021-06-05 23:50:41,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 45461 states and 187951 transitions. [2021-06-05 23:50:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:41,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:41,560 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:41,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 23:50:41,761 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash 194749545, now seen corresponding path program 102 times [2021-06-05 23:50:41,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:41,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722104992] [2021-06-05 23:50:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:42,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:42,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722104992] [2021-06-05 23:50:42,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722104992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:42,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745415359] [2021-06-05 23:50:42,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:42,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:50:42,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:42,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:50:42,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:42,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:42,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:42,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:42,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:42,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:42 [2021-06-05 23:50:42,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:42,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:42,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 23:50:42,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:42,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:42,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:42,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:9 [2021-06-05 23:50:42,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:42,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:50:42,421 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:42,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:42,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:42,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:50:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:42,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745415359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:42,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:42,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:50:42,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793812036] [2021-06-05 23:50:42,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:50:42,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:42,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:50:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:50:42,471 INFO L87 Difference]: Start difference. First operand 45461 states and 187951 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:44,735 INFO L93 Difference]: Finished difference Result 77469 states and 315626 transitions. [2021-06-05 23:50:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:50:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:44,971 INFO L225 Difference]: With dead ends: 77469 [2021-06-05 23:50:44,971 INFO L226 Difference]: Without dead ends: 77289 [2021-06-05 23:50:44,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1508.5ms TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:50:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77289 states. [2021-06-05 23:50:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77289 to 45748. [2021-06-05 23:50:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45748 states, 45747 states have (on average 4.132686296369161) internal successors, (189058), 45747 states have internal predecessors, (189058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45748 states to 45748 states and 189058 transitions. [2021-06-05 23:50:46,264 INFO L78 Accepts]: Start accepts. Automaton has 45748 states and 189058 transitions. Word has length 39 [2021-06-05 23:50:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:46,264 INFO L482 AbstractCegarLoop]: Abstraction has 45748 states and 189058 transitions. [2021-06-05 23:50:46,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 45748 states and 189058 transitions. [2021-06-05 23:50:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:46,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:46,352 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:46,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 23:50:46,565 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1403012379, now seen corresponding path program 103 times [2021-06-05 23:50:46,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:46,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314339648] [2021-06-05 23:50:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:46,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:46,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314339648] [2021-06-05 23:50:46,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314339648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:46,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732588694] [2021-06-05 23:50:46,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:46,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:46,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:47,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:47,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:47,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:47,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:47,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:50:47,123 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:47,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:50:47,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:47,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:47,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:47,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:50:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:47,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732588694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:47,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:47,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:47,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464219021] [2021-06-05 23:50:47,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:47,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:47,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:47,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:47,163 INFO L87 Difference]: Start difference. First operand 45748 states and 189058 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:49,948 INFO L93 Difference]: Finished difference Result 107489 states and 436848 transitions. [2021-06-05 23:50:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:50:49,949 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:50,322 INFO L225 Difference]: With dead ends: 107489 [2021-06-05 23:50:50,322 INFO L226 Difference]: Without dead ends: 107353 [2021-06-05 23:50:50,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1523.4ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:50:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107353 states. [2021-06-05 23:50:51,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107353 to 45307. [2021-06-05 23:50:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45307 states, 45306 states have (on average 4.135633249459233) internal successors, (187369), 45306 states have internal predecessors, (187369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45307 states to 45307 states and 187369 transitions. [2021-06-05 23:50:51,817 INFO L78 Accepts]: Start accepts. Automaton has 45307 states and 187369 transitions. Word has length 39 [2021-06-05 23:50:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:51,817 INFO L482 AbstractCegarLoop]: Abstraction has 45307 states and 187369 transitions. [2021-06-05 23:50:51,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 45307 states and 187369 transitions. [2021-06-05 23:50:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:51,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:51,900 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:52,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:52,109 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash -435644929, now seen corresponding path program 104 times [2021-06-05 23:50:52,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:52,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469388282] [2021-06-05 23:50:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:52,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469388282] [2021-06-05 23:50:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469388282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228296710] [2021-06-05 23:50:52,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:52,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:52,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:50:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:52,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:52,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:52,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:52,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:52,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:50:52,665 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:50:52,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:50:52,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:52,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:52,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:52,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:50:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:52,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228296710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:52,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:52,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:50:52,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363819713] [2021-06-05 23:50:52,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:50:52,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:52,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:50:52,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:50:52,706 INFO L87 Difference]: Start difference. First operand 45307 states and 187369 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:54,764 INFO L93 Difference]: Finished difference Result 96567 states and 393752 transitions. [2021-06-05 23:50:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:50:54,764 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:50:54,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:55,053 INFO L225 Difference]: With dead ends: 96567 [2021-06-05 23:50:55,053 INFO L226 Difference]: Without dead ends: 96415 [2021-06-05 23:50:55,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 986.5ms TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:50:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96415 states. [2021-06-05 23:50:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96415 to 45393. [2021-06-05 23:50:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45393 states, 45392 states have (on average 4.136786217835742) internal successors, (187777), 45392 states have internal predecessors, (187777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45393 states to 45393 states and 187777 transitions. [2021-06-05 23:50:56,789 INFO L78 Accepts]: Start accepts. Automaton has 45393 states and 187777 transitions. Word has length 39 [2021-06-05 23:50:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:56,789 INFO L482 AbstractCegarLoop]: Abstraction has 45393 states and 187777 transitions. [2021-06-05 23:50:56,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 45393 states and 187777 transitions. [2021-06-05 23:50:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:50:56,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:56,883 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:57,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-06-05 23:50:57,084 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash -709551041, now seen corresponding path program 105 times [2021-06-05 23:50:57,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:57,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28996815] [2021-06-05 23:50:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:57,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28996815] [2021-06-05 23:50:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28996815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:57,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319805930] [2021-06-05 23:50:57,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:57,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:50:57,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:57,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:50:57,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:57,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:50:57,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:57,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:57,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:57,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:28 [2021-06-05 23:50:57,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:50:57,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:57,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:57,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:57,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2021-06-05 23:50:57,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:57,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:50:57,727 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:57,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:57,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:50:57,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-06-05 23:50:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:57,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319805930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:57,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:57,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:50:57,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282236823] [2021-06-05 23:50:57,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:50:57,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:57,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:50:57,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:50:57,817 INFO L87 Difference]: Start difference. First operand 45393 states and 187777 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:59,650 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 23:51:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:02,523 INFO L93 Difference]: Finished difference Result 132985 states and 543840 transitions. [2021-06-05 23:51:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:51:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:02,956 INFO L225 Difference]: With dead ends: 132985 [2021-06-05 23:51:02,956 INFO L226 Difference]: Without dead ends: 132732 [2021-06-05 23:51:02,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 3054.2ms TimeCoverageRelationStatistics Valid=1186, Invalid=6124, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 23:51:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132732 states. [2021-06-05 23:51:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132732 to 45733. [2021-06-05 23:51:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45733 states, 45732 states have (on average 4.137321787807225) internal successors, (189208), 45732 states have internal predecessors, (189208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45733 states to 45733 states and 189208 transitions. [2021-06-05 23:51:04,921 INFO L78 Accepts]: Start accepts. Automaton has 45733 states and 189208 transitions. Word has length 39 [2021-06-05 23:51:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:04,921 INFO L482 AbstractCegarLoop]: Abstraction has 45733 states and 189208 transitions. [2021-06-05 23:51:04,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45733 states and 189208 transitions. [2021-06-05 23:51:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:05,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:05,006 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:05,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:05,209 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash 39545235, now seen corresponding path program 106 times [2021-06-05 23:51:05,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:05,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463241292] [2021-06-05 23:51:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:05,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463241292] [2021-06-05 23:51:05,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463241292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063118389] [2021-06-05 23:51:05,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:05,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:51:05,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:05,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:51:05,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:05,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:05,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:05,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:05,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:05,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:51:05,988 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 23:51:06,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:06,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:51:06,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:06,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:06,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:06,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:51:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:06,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063118389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:06,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:06,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-06-05 23:51:06,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732745558] [2021-06-05 23:51:06,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:51:06,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:06,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:51:06,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:51:06,095 INFO L87 Difference]: Start difference. First operand 45733 states and 189208 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 23:51:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:07,623 INFO L93 Difference]: Finished difference Result 84301 states and 345147 transitions. [2021-06-05 23:51:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:51:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 39 [2021-06-05 23:51:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:07,876 INFO L225 Difference]: With dead ends: 84301 [2021-06-05 23:51:07,876 INFO L226 Difference]: Without dead ends: 84227 [2021-06-05 23:51:07,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 843.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:51:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84227 states. [2021-06-05 23:51:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84227 to 45327. [2021-06-05 23:51:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45327 states, 45326 states have (on average 4.136588271632176) internal successors, (187495), 45326 states have internal predecessors, (187495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45327 states to 45327 states and 187495 transitions. [2021-06-05 23:51:09,453 INFO L78 Accepts]: Start accepts. Automaton has 45327 states and 187495 transitions. Word has length 39 [2021-06-05 23:51:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:09,454 INFO L482 AbstractCegarLoop]: Abstraction has 45327 states and 187495 transitions. [2021-06-05 23:51:09,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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 23:51:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 45327 states and 187495 transitions. [2021-06-05 23:51:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:09,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:09,548 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:09,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:09,749 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:09,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:09,751 INFO L82 PathProgramCache]: Analyzing trace with hash -520372819, now seen corresponding path program 107 times [2021-06-05 23:51:09,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:09,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33822696] [2021-06-05 23:51:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:10,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:10,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33822696] [2021-06-05 23:51:10,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33822696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:10,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253872950] [2021-06-05 23:51:10,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:10,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:51:10,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:10,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:51:10,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:10,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:10,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 23:51:10,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:10,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:10,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:10,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:70 [2021-06-05 23:51:10,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:10,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2021-06-05 23:51:10,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:10,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:10,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:10,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 24 [2021-06-05 23:51:10,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:10,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:10,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 23:51:10,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:10,530 INFO L628 ElimStorePlain]: treesize reduction 41, result has 71.1 percent of original size [2021-06-05 23:51:10,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:10,539 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:163, output treesize:67 [2021-06-05 23:51:10,650 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_272], 6=[q1]} [2021-06-05 23:51:10,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:51:10,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:10,695 INFO L628 ElimStorePlain]: treesize reduction 15, result has 82.6 percent of original size [2021-06-05 23:51:10,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:10,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:10,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-06-05 23:51:10,713 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:10,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:10,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:10,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:97, output treesize:60 [2021-06-05 23:51:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:10,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253872950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:10,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:10,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:51:10,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339483045] [2021-06-05 23:51:10,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:51:10,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:10,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:51:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:51:10,829 INFO L87 Difference]: Start difference. First operand 45327 states and 187495 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:12,741 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 23:51:12,883 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 23:51:14,374 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-06-05 23:51:15,044 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 23:51:15,496 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:51:16,404 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-05 23:51:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:18,293 INFO L93 Difference]: Finished difference Result 90418 states and 367787 transitions. [2021-06-05 23:51:18,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 23:51:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:18,571 INFO L225 Difference]: With dead ends: 90418 [2021-06-05 23:51:18,571 INFO L226 Difference]: Without dead ends: 90161 [2021-06-05 23:51:18,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 5902.8ms TimeCoverageRelationStatistics Valid=1597, Invalid=10175, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:51:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90161 states. [2021-06-05 23:51:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90161 to 45558. [2021-06-05 23:51:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45558 states, 45557 states have (on average 4.135478631165353) internal successors, (188400), 45557 states have internal predecessors, (188400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45558 states to 45558 states and 188400 transitions. [2021-06-05 23:51:19,950 INFO L78 Accepts]: Start accepts. Automaton has 45558 states and 188400 transitions. Word has length 39 [2021-06-05 23:51:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:19,950 INFO L482 AbstractCegarLoop]: Abstraction has 45558 states and 188400 transitions. [2021-06-05 23:51:19,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 45558 states and 188400 transitions. [2021-06-05 23:51:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:20,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:20,035 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:20,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:20,236 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 116898119, now seen corresponding path program 108 times [2021-06-05 23:51:20,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:20,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681237280] [2021-06-05 23:51:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:20,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:20,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681237280] [2021-06-05 23:51:20,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681237280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:20,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273205478] [2021-06-05 23:51:20,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:20,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:51:20,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:20,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:51:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:20,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:20,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:20,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:20,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:20,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:51:20,763 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:20,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:51:20,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:20,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:20,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:20,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:51:20,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:20,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:51:20,809 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:20,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:20,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:20,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:51:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:20,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273205478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:20,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:20,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:51:20,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408347428] [2021-06-05 23:51:20,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:51:20,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:20,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:51:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:51:20,857 INFO L87 Difference]: Start difference. First operand 45558 states and 188400 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 23:51:22,092 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 23:51:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:23,475 INFO L93 Difference]: Finished difference Result 95560 states and 387294 transitions. [2021-06-05 23:51:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:51:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 23:51:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:23,751 INFO L225 Difference]: With dead ends: 95560 [2021-06-05 23:51:23,751 INFO L226 Difference]: Without dead ends: 95369 [2021-06-05 23:51:23,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1633.5ms TimeCoverageRelationStatistics Valid=484, Invalid=2822, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:51:23,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95369 states. [2021-06-05 23:51:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95369 to 45353. [2021-06-05 23:51:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45353 states, 45352 states have (on average 4.137700652672429) internal successors, (187653), 45352 states have internal predecessors, (187653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45353 states to 45353 states and 187653 transitions. [2021-06-05 23:51:25,479 INFO L78 Accepts]: Start accepts. Automaton has 45353 states and 187653 transitions. Word has length 39 [2021-06-05 23:51:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:25,479 INFO L482 AbstractCegarLoop]: Abstraction has 45353 states and 187653 transitions. [2021-06-05 23:51:25,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 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 23:51:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 45353 states and 187653 transitions. [2021-06-05 23:51:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:25,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:25,566 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:25,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:25,767 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1040958189, now seen corresponding path program 109 times [2021-06-05 23:51:25,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:25,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293821545] [2021-06-05 23:51:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:25,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:25,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293821545] [2021-06-05 23:51:25,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293821545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:25,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757861690] [2021-06-05 23:51:25,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:51:26,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:26,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:26,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:26,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:26,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:26,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:51:26,246 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:26,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:51:26,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:26,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:26,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:26,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:51:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:26,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757861690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:26,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:26,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:51:26,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483131484] [2021-06-05 23:51:26,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:51:26,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:26,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:51:26,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:51:26,293 INFO L87 Difference]: Start difference. First operand 45353 states and 187653 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:27,982 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 23:51:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:28,590 INFO L93 Difference]: Finished difference Result 117587 states and 478149 transitions. [2021-06-05 23:51:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:51:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:28,965 INFO L225 Difference]: With dead ends: 117587 [2021-06-05 23:51:28,965 INFO L226 Difference]: Without dead ends: 117532 [2021-06-05 23:51:28,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1238.6ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:51:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117532 states. [2021-06-05 23:51:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117532 to 44455. [2021-06-05 23:51:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44455 states, 44454 states have (on average 4.1342736311692985) internal successors, (183785), 44454 states have internal predecessors, (183785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44455 states to 44455 states and 183785 transitions. [2021-06-05 23:51:30,598 INFO L78 Accepts]: Start accepts. Automaton has 44455 states and 183785 transitions. Word has length 39 [2021-06-05 23:51:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:30,599 INFO L482 AbstractCegarLoop]: Abstraction has 44455 states and 183785 transitions. [2021-06-05 23:51:30,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:30,599 INFO L276 IsEmpty]: Start isEmpty. Operand 44455 states and 183785 transitions. [2021-06-05 23:51:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:31,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:31,019 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:31,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 23:51:31,233 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:31,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1160485695, now seen corresponding path program 110 times [2021-06-05 23:51:31,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:31,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250435686] [2021-06-05 23:51:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:31,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:31,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250435686] [2021-06-05 23:51:31,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250435686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:31,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013549599] [2021-06-05 23:51:31,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:31,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:51:31,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:31,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:51:31,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:31,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:31,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 23:51:31,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:31,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:31,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:31,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:51 [2021-06-05 23:51:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:31,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:51:31,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:31,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:31,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-06-05 23:51:31,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:31,789 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:31,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 13 [2021-06-05 23:51:31,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:31,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:31,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:31,802 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:108, output treesize:43 [2021-06-05 23:51:31,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:31,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:51:31,900 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:31,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:31,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:31,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:51:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:31,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013549599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:31,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:31,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:51:31,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773239269] [2021-06-05 23:51:31,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:51:31,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:51:31,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:51:31,945 INFO L87 Difference]: Start difference. First operand 44455 states and 183785 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:32,673 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2021-06-05 23:51:33,953 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 23:51:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:37,058 INFO L93 Difference]: Finished difference Result 111995 states and 451742 transitions. [2021-06-05 23:51:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:51:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:37,424 INFO L225 Difference]: With dead ends: 111995 [2021-06-05 23:51:37,424 INFO L226 Difference]: Without dead ends: 111956 [2021-06-05 23:51:37,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 3650.8ms TimeCoverageRelationStatistics Valid=1129, Invalid=6011, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:51:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111956 states. [2021-06-05 23:51:38,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111956 to 44397. [2021-06-05 23:51:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44397 states, 44396 states have (on average 4.132782232633571) internal successors, (183479), 44396 states have internal predecessors, (183479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44397 states to 44397 states and 183479 transitions. [2021-06-05 23:51:38,979 INFO L78 Accepts]: Start accepts. Automaton has 44397 states and 183479 transitions. Word has length 39 [2021-06-05 23:51:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:38,980 INFO L482 AbstractCegarLoop]: Abstraction has 44397 states and 183479 transitions. [2021-06-05 23:51:38,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:38,980 INFO L276 IsEmpty]: Start isEmpty. Operand 44397 states and 183479 transitions. [2021-06-05 23:51:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:39,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:39,061 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:39,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-05 23:51:39,262 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1988991611, now seen corresponding path program 111 times [2021-06-05 23:51:39,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:39,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019457462] [2021-06-05 23:51:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:39,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:39,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019457462] [2021-06-05 23:51:39,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019457462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:39,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448517738] [2021-06-05 23:51:39,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:39,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:51:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:51:39,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:39,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:39,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:39,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:39,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:39,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-06-05 23:51:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:39,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:39,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 42 [2021-06-05 23:51:39,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:39,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:39,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:51:39,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:83 [2021-06-05 23:51:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:39,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448517738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:39,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:39,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:51:39,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673448102] [2021-06-05 23:51:39,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:51:39,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:39,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:51:39,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:51:39,811 INFO L87 Difference]: Start difference. First operand 44397 states and 183479 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:42,790 INFO L93 Difference]: Finished difference Result 97210 states and 394835 transitions. [2021-06-05 23:51:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:51:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 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 39 [2021-06-05 23:51:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:43,078 INFO L225 Difference]: With dead ends: 97210 [2021-06-05 23:51:43,078 INFO L226 Difference]: Without dead ends: 97155 [2021-06-05 23:51:43,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1304.7ms TimeCoverageRelationStatistics Valid=442, Invalid=2750, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:51:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97155 states. [2021-06-05 23:51:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97155 to 45104. [2021-06-05 23:51:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45104 states, 45103 states have (on average 4.140966232844822) internal successors, (186770), 45103 states have internal predecessors, (186770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45104 states to 45104 states and 186770 transitions. [2021-06-05 23:51:44,528 INFO L78 Accepts]: Start accepts. Automaton has 45104 states and 186770 transitions. Word has length 39 [2021-06-05 23:51:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:44,528 INFO L482 AbstractCegarLoop]: Abstraction has 45104 states and 186770 transitions. [2021-06-05 23:51:44,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 45104 states and 186770 transitions. [2021-06-05 23:51:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:44,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:44,618 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:44,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:44,819 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1227178289, now seen corresponding path program 112 times [2021-06-05 23:51:44,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:44,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692545504] [2021-06-05 23:51:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:45,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:45,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692545504] [2021-06-05 23:51:45,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692545504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:45,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396601330] [2021-06-05 23:51:45,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:45,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:51:45,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:51:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:45,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:51:45,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:45,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:45,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:45,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-06-05 23:51:45,279 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:51:45,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-06-05 23:51:45,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:45,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:45,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:45,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:51:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:45,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396601330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:45,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:45,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:51:45,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486118811] [2021-06-05 23:51:45,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:51:45,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:45,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:51:45,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:51:45,335 INFO L87 Difference]: Start difference. First operand 45104 states and 186770 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:47,103 INFO L93 Difference]: Finished difference Result 84712 states and 348272 transitions. [2021-06-05 23:51:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:51:47,103 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:47,362 INFO L225 Difference]: With dead ends: 84712 [2021-06-05 23:51:47,362 INFO L226 Difference]: Without dead ends: 84657 [2021-06-05 23:51:47,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 766.4ms TimeCoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:51:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84657 states. [2021-06-05 23:51:48,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84657 to 44269. [2021-06-05 23:51:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44269 states, 44268 states have (on average 4.134386012469504) internal successors, (183021), 44268 states have internal predecessors, (183021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44269 states to 44269 states and 183021 transitions. [2021-06-05 23:51:48,681 INFO L78 Accepts]: Start accepts. Automaton has 44269 states and 183021 transitions. Word has length 39 [2021-06-05 23:51:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:48,681 INFO L482 AbstractCegarLoop]: Abstraction has 44269 states and 183021 transitions. [2021-06-05 23:51:48,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 44269 states and 183021 transitions. [2021-06-05 23:51:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:48,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:48,764 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:48,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 23:51:48,964 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1103043159, now seen corresponding path program 113 times [2021-06-05 23:51:48,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:48,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492944713] [2021-06-05 23:51:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:49,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:49,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492944713] [2021-06-05 23:51:49,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492944713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:49,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547766494] [2021-06-05 23:51:49,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:49,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:51:49,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:49,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:51:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:49,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:49,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 23:51:49,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:49,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:49,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:49,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:19 [2021-06-05 23:51:49,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:51:49,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:49,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:49,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:49,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:51:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:49,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547766494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:49,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:49,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-06-05 23:51:49,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144058047] [2021-06-05 23:51:49,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:51:49,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:49,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:51:49,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:51:49,520 INFO L87 Difference]: Start difference. First operand 44269 states and 183021 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:50,109 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 23:51:51,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:51,523 INFO L93 Difference]: Finished difference Result 80110 states and 326755 transitions. [2021-06-05 23:51:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:51:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 39 [2021-06-05 23:51:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:51,761 INFO L225 Difference]: With dead ends: 80110 [2021-06-05 23:51:51,761 INFO L226 Difference]: Without dead ends: 80029 [2021-06-05 23:51:51,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1162.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:51:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80029 states. [2021-06-05 23:51:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80029 to 44878. [2021-06-05 23:51:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44878 states, 44877 states have (on average 4.1345901018339015) internal successors, (185548), 44877 states have internal predecessors, (185548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44878 states to 44878 states and 185548 transitions. [2021-06-05 23:51:53,069 INFO L78 Accepts]: Start accepts. Automaton has 44878 states and 185548 transitions. Word has length 39 [2021-06-05 23:51:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:53,069 INFO L482 AbstractCegarLoop]: Abstraction has 44878 states and 185548 transitions. [2021-06-05 23:51:53,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 44878 states and 185548 transitions. [2021-06-05 23:51:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:53,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:53,162 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:53,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:53,363 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash 831476315, now seen corresponding path program 114 times [2021-06-05 23:51:53,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:53,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548918371] [2021-06-05 23:51:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:53,677 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 23:51:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:53,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548918371] [2021-06-05 23:51:53,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548918371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140568564] [2021-06-05 23:51:53,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:53,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:51:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:53,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:51:53,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:54,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:54,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:54,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2021-06-05 23:51:54,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:54,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:54,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:54,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:29 [2021-06-05 23:51:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:54,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:54,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:54,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 37 [2021-06-05 23:51:54,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:51:54,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:54,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:54,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 23:51:54,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:54,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:51:54,442 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:54,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:54,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:51:54,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:39 [2021-06-05 23:51:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:54,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140568564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:54,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:54,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 23:51:54,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986275934] [2021-06-05 23:51:54,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:51:54,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:51:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:51:54,580 INFO L87 Difference]: Start difference. First operand 44878 states and 185548 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:57,995 INFO L93 Difference]: Finished difference Result 69512 states and 282267 transitions. [2021-06-05 23:51:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:51:57,995 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:51:57,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:58,215 INFO L225 Difference]: With dead ends: 69512 [2021-06-05 23:51:58,215 INFO L226 Difference]: Without dead ends: 69280 [2021-06-05 23:51:58,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 2677.5ms TimeCoverageRelationStatistics Valid=677, Invalid=4015, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:51:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69280 states. [2021-06-05 23:51:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69280 to 45307. [2021-06-05 23:51:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45307 states, 45306 states have (on average 4.127753498432878) internal successors, (187012), 45306 states have internal predecessors, (187012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45307 states to 45307 states and 187012 transitions. [2021-06-05 23:51:59,340 INFO L78 Accepts]: Start accepts. Automaton has 45307 states and 187012 transitions. Word has length 39 [2021-06-05 23:51:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:59,340 INFO L482 AbstractCegarLoop]: Abstraction has 45307 states and 187012 transitions. [2021-06-05 23:51:59,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 45307 states and 187012 transitions. [2021-06-05 23:51:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:51:59,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:59,424 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:51:59,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:59,624 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash -850360595, now seen corresponding path program 115 times [2021-06-05 23:51:59,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:59,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937447745] [2021-06-05 23:51:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:59,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:59,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937447745] [2021-06-05 23:51:59,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937447745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:59,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256168203] [2021-06-05 23:51:59,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:51:59,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:00,039 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:00,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:00,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:00,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:00,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:00,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:52:00,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:00,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:00,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:00,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:00,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:52:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:00,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256168203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:00,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:00,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:00,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339433748] [2021-06-05 23:52:00,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:00,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:00,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:00,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:00,188 INFO L87 Difference]: Start difference. First operand 45307 states and 187012 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:00,517 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-06-05 23:52:02,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:02,435 INFO L93 Difference]: Finished difference Result 90955 states and 367640 transitions. [2021-06-05 23:52:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:52:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:02,936 INFO L225 Difference]: With dead ends: 90955 [2021-06-05 23:52:02,936 INFO L226 Difference]: Without dead ends: 90592 [2021-06-05 23:52:02,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1517.9ms TimeCoverageRelationStatistics Valid=495, Invalid=2697, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:52:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90592 states. [2021-06-05 23:52:04,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90592 to 44829. [2021-06-05 23:52:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44829 states, 44828 states have (on average 4.1365441242080845) internal successors, (185433), 44828 states have internal predecessors, (185433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44829 states to 44829 states and 185433 transitions. [2021-06-05 23:52:04,295 INFO L78 Accepts]: Start accepts. Automaton has 44829 states and 185433 transitions. Word has length 39 [2021-06-05 23:52:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:04,295 INFO L482 AbstractCegarLoop]: Abstraction has 44829 states and 185433 transitions. [2021-06-05 23:52:04,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 44829 states and 185433 transitions. [2021-06-05 23:52:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:04,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:04,384 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:04,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-05 23:52:04,585 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1434585171, now seen corresponding path program 116 times [2021-06-05 23:52:04,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:04,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085181920] [2021-06-05 23:52:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:04,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:04,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085181920] [2021-06-05 23:52:04,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085181920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:04,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776974607] [2021-06-05 23:52:04,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:04,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:04,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:52:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:04,997 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:04,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:04,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 23:52:05,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:52:05,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-06-05 23:52:05,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:05,136 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:05,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:05,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:52:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:05,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776974607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:05,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:05,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:52:05,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718937060] [2021-06-05 23:52:05,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:52:05,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:05,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:52:05,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:52:05,185 INFO L87 Difference]: Start difference. First operand 44829 states and 185433 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:07,751 INFO L93 Difference]: Finished difference Result 77450 states and 314222 transitions. [2021-06-05 23:52:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:52:07,752 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:07,974 INFO L225 Difference]: With dead ends: 77450 [2021-06-05 23:52:07,974 INFO L226 Difference]: Without dead ends: 77136 [2021-06-05 23:52:07,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1636.8ms TimeCoverageRelationStatistics Valid=452, Invalid=2740, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:52:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77136 states. [2021-06-05 23:52:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77136 to 44773. [2021-06-05 23:52:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44773 states, 44772 states have (on average 4.138144375949254) internal successors, (185273), 44772 states have internal predecessors, (185273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44773 states to 44773 states and 185273 transitions. [2021-06-05 23:52:09,299 INFO L78 Accepts]: Start accepts. Automaton has 44773 states and 185273 transitions. Word has length 39 [2021-06-05 23:52:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:09,299 INFO L482 AbstractCegarLoop]: Abstraction has 44773 states and 185273 transitions. [2021-06-05 23:52:09,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 44773 states and 185273 transitions. [2021-06-05 23:52:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:09,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:09,384 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:09,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-05 23:52:09,585 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash 536940103, now seen corresponding path program 117 times [2021-06-05 23:52:09,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:09,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968741304] [2021-06-05 23:52:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:09,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:09,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968741304] [2021-06-05 23:52:09,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968741304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:09,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685739463] [2021-06-05 23:52:09,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:09,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:52:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:09,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:52:09,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:09,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:09,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:52:10,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:10,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:10,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:10,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-06-05 23:52:10,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:52:10,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:10,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:10,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:10,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-06-05 23:52:10,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:10,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:10,431 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:10,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:10,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:10,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:52:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:10,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685739463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:10,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:10,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:52:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479319636] [2021-06-05 23:52:10,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:52:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:52:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:52:10,472 INFO L87 Difference]: Start difference. First operand 44773 states and 185273 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:13,024 INFO L93 Difference]: Finished difference Result 78265 states and 318586 transitions. [2021-06-05 23:52:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:52:13,025 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:13,255 INFO L225 Difference]: With dead ends: 78265 [2021-06-05 23:52:13,255 INFO L226 Difference]: Without dead ends: 78192 [2021-06-05 23:52:13,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1705.0ms TimeCoverageRelationStatistics Valid=472, Invalid=3310, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:52:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78192 states. [2021-06-05 23:52:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78192 to 45190. [2021-06-05 23:52:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45190 states, 45189 states have (on average 4.134922215583439) internal successors, (186853), 45189 states have internal predecessors, (186853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45190 states to 45190 states and 186853 transitions. [2021-06-05 23:52:14,495 INFO L78 Accepts]: Start accepts. Automaton has 45190 states and 186853 transitions. Word has length 39 [2021-06-05 23:52:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:14,495 INFO L482 AbstractCegarLoop]: Abstraction has 45190 states and 186853 transitions. [2021-06-05 23:52:14,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:14,495 INFO L276 IsEmpty]: Start isEmpty. Operand 45190 states and 186853 transitions. [2021-06-05 23:52:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:14,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:14,583 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:14,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable659,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:14,784 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1823507719, now seen corresponding path program 118 times [2021-06-05 23:52:14,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:14,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591319689] [2021-06-05 23:52:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:15,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:15,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591319689] [2021-06-05 23:52:15,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591319689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:15,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733611375] [2021-06-05 23:52:15,058 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:15,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:15,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:15,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:52:15,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:15,226 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:15,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:52:15,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:15,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:15,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:15,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:52:15,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:15,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:15,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:15,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:15,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:52:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:15,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733611375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:15,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:15,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:15,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903711054] [2021-06-05 23:52:15,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:15,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:15,366 INFO L87 Difference]: Start difference. First operand 45190 states and 186853 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:17,542 INFO L93 Difference]: Finished difference Result 76243 states and 310030 transitions. [2021-06-05 23:52:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:52:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:17,765 INFO L225 Difference]: With dead ends: 76243 [2021-06-05 23:52:17,765 INFO L226 Difference]: Without dead ends: 75935 [2021-06-05 23:52:17,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1148.2ms TimeCoverageRelationStatistics Valid=401, Invalid=1951, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:52:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75935 states. [2021-06-05 23:52:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75935 to 45196. [2021-06-05 23:52:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45196 states, 45195 states have (on average 4.135302577718774) internal successors, (186895), 45195 states have internal predecessors, (186895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45196 states to 45196 states and 186895 transitions. [2021-06-05 23:52:19,003 INFO L78 Accepts]: Start accepts. Automaton has 45196 states and 186895 transitions. Word has length 39 [2021-06-05 23:52:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:19,003 INFO L482 AbstractCegarLoop]: Abstraction has 45196 states and 186895 transitions. [2021-06-05 23:52:19,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45196 states and 186895 transitions. [2021-06-05 23:52:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:19,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:19,082 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:19,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 23:52:19,289 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1220398863, now seen corresponding path program 119 times [2021-06-05 23:52:19,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:19,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105188065] [2021-06-05 23:52:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:19,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105188065] [2021-06-05 23:52:19,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105188065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:19,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443286908] [2021-06-05 23:52:19,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:19,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:52:19,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:52:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:19,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:19,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:19,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-06-05 23:52:19,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:19,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:19,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:19,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-06-05 23:52:20,090 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 23:52:20,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:20,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:20,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:20,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:52:20,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:20,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:20,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:20,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-06-05 23:52:20,242 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:20,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:20,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:3 [2021-06-05 23:52:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:20,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443286908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:20,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:20,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:52:20,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637600629] [2021-06-05 23:52:20,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:52:20,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:20,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:52:20,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:52:20,267 INFO L87 Difference]: Start difference. First operand 45196 states and 186895 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:23,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:23,264 INFO L93 Difference]: Finished difference Result 72562 states and 295371 transitions. [2021-06-05 23:52:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:52:23,265 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:23,472 INFO L225 Difference]: With dead ends: 72562 [2021-06-05 23:52:23,472 INFO L226 Difference]: Without dead ends: 72393 [2021-06-05 23:52:23,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 2006.5ms TimeCoverageRelationStatistics Valid=450, Invalid=2856, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:52:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72393 states. [2021-06-05 23:52:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72393 to 45350. [2021-06-05 23:52:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45350 states, 45349 states have (on average 4.132042602923989) internal successors, (187384), 45349 states have internal predecessors, (187384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45350 states to 45350 states and 187384 transitions. [2021-06-05 23:52:24,681 INFO L78 Accepts]: Start accepts. Automaton has 45350 states and 187384 transitions. Word has length 39 [2021-06-05 23:52:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:24,681 INFO L482 AbstractCegarLoop]: Abstraction has 45350 states and 187384 transitions. [2021-06-05 23:52:24,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 45350 states and 187384 transitions. [2021-06-05 23:52:24,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:24,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:24,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:24,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:24,965 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1284438517, now seen corresponding path program 120 times [2021-06-05 23:52:24,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:24,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165888073] [2021-06-05 23:52:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:25,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:25,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165888073] [2021-06-05 23:52:25,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165888073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:25,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867272773] [2021-06-05 23:52:25,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:25,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:52:25,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:52:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:25,450 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:25,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 23:52:25,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:25,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:25,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:25,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:37 [2021-06-05 23:52:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:25,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:25,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-06-05 23:52:25,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:25,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:25,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:25,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:35 [2021-06-05 23:52:25,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:25,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:25,706 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:25,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:25,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:25,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:37 [2021-06-05 23:52:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:25,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867272773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:25,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:25,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 23:52:25,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827453592] [2021-06-05 23:52:25,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:52:25,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:52:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:52:25,805 INFO L87 Difference]: Start difference. First operand 45350 states and 187384 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:29,010 INFO L93 Difference]: Finished difference Result 91346 states and 368826 transitions. [2021-06-05 23:52:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:52:29,011 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:29,504 INFO L225 Difference]: With dead ends: 91346 [2021-06-05 23:52:29,505 INFO L226 Difference]: Without dead ends: 91202 [2021-06-05 23:52:29,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2079.5ms TimeCoverageRelationStatistics Valid=589, Invalid=3571, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:52:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91202 states. [2021-06-05 23:52:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91202 to 45395. [2021-06-05 23:52:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45395 states, 45394 states have (on average 4.131515178217385) internal successors, (187546), 45394 states have internal predecessors, (187546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45395 states to 45395 states and 187546 transitions. [2021-06-05 23:52:30,927 INFO L78 Accepts]: Start accepts. Automaton has 45395 states and 187546 transitions. Word has length 39 [2021-06-05 23:52:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:30,927 INFO L482 AbstractCegarLoop]: Abstraction has 45395 states and 187546 transitions. [2021-06-05 23:52:30,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 45395 states and 187546 transitions. [2021-06-05 23:52:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:31,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:31,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:31,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:31,213 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:31,213 INFO L82 PathProgramCache]: Analyzing trace with hash -647042379, now seen corresponding path program 121 times [2021-06-05 23:52:31,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:31,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782403317] [2021-06-05 23:52:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:31,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:31,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782403317] [2021-06-05 23:52:31,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782403317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:31,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263050594] [2021-06-05 23:52:31,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:52:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:31,613 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:31,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:52:31,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:31,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:31,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:31,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:52:31,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:52:31,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:31,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:31,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:31,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:52:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:31,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263050594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:31,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:31,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:31,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269485473] [2021-06-05 23:52:31,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:31,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:31,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:31,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:31,737 INFO L87 Difference]: Start difference. First operand 45395 states and 187546 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:33,408 INFO L93 Difference]: Finished difference Result 80962 states and 330508 transitions. [2021-06-05 23:52:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:52:33,408 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:33,651 INFO L225 Difference]: With dead ends: 80962 [2021-06-05 23:52:33,651 INFO L226 Difference]: Without dead ends: 80881 [2021-06-05 23:52:33,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 825.7ms TimeCoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:52:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80881 states. [2021-06-05 23:52:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80881 to 45101. [2021-06-05 23:52:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45101 states, 45100 states have (on average 4.133414634146342) internal successors, (186417), 45100 states have internal predecessors, (186417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45101 states to 45101 states and 186417 transitions. [2021-06-05 23:52:34,913 INFO L78 Accepts]: Start accepts. Automaton has 45101 states and 186417 transitions. Word has length 39 [2021-06-05 23:52:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:34,913 INFO L482 AbstractCegarLoop]: Abstraction has 45101 states and 186417 transitions. [2021-06-05 23:52:34,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 45101 states and 186417 transitions. [2021-06-05 23:52:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:34,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:34,996 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:35,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 23:52:35,196 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1411352253, now seen corresponding path program 122 times [2021-06-05 23:52:35,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:35,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974654416] [2021-06-05 23:52:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:35,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:35,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974654416] [2021-06-05 23:52:35,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974654416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666887117] [2021-06-05 23:52:35,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:35,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:52:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:35,685 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:35,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:52:35,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:35,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:35,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:35,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:52:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:52:35,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:35,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:35,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:35,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:9 [2021-06-05 23:52:35,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:35,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:35,803 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:35,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:35,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:35,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:52:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:35,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666887117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:35,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:35,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:52:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367738068] [2021-06-05 23:52:35,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:52:35,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:35,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:52:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:52:35,851 INFO L87 Difference]: Start difference. First operand 45101 states and 186417 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:36,536 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-06-05 23:52:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:38,501 INFO L93 Difference]: Finished difference Result 91900 states and 371553 transitions. [2021-06-05 23:52:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:52:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:39,038 INFO L225 Difference]: With dead ends: 91900 [2021-06-05 23:52:39,039 INFO L226 Difference]: Without dead ends: 91492 [2021-06-05 23:52:39,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1934.0ms TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:52:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91492 states. [2021-06-05 23:52:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91492 to 44801. [2021-06-05 23:52:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44801 states, 44800 states have (on average 4.138058035714286) internal successors, (185385), 44800 states have internal predecessors, (185385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44801 states to 44801 states and 185385 transitions. [2021-06-05 23:52:40,463 INFO L78 Accepts]: Start accepts. Automaton has 44801 states and 185385 transitions. Word has length 39 [2021-06-05 23:52:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:40,463 INFO L482 AbstractCegarLoop]: Abstraction has 44801 states and 185385 transitions. [2021-06-05 23:52:40,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 44801 states and 185385 transitions. [2021-06-05 23:52:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:40,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:40,549 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:40,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-06-05 23:52:40,750 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash 7253553, now seen corresponding path program 123 times [2021-06-05 23:52:40,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:40,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102664504] [2021-06-05 23:52:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:41,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:41,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102664504] [2021-06-05 23:52:41,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102664504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:41,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050029736] [2021-06-05 23:52:41,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:41,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:52:41,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:52:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:41,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:41,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:41,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-06-05 23:52:41,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:41,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:41,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:41,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:89 [2021-06-05 23:52:41,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:52:41,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:41,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:41,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:41,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-06-05 23:52:41,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:41,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:41,362 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:41,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:41,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:41,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:52:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:41,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050029736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:41,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:41,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:52:41,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913134093] [2021-06-05 23:52:41,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:52:41,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:41,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:52:41,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:52:41,409 INFO L87 Difference]: Start difference. First operand 44801 states and 185385 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:44,181 INFO L93 Difference]: Finished difference Result 80064 states and 325573 transitions. [2021-06-05 23:52:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:52:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:44,442 INFO L225 Difference]: With dead ends: 80064 [2021-06-05 23:52:44,442 INFO L226 Difference]: Without dead ends: 79991 [2021-06-05 23:52:44,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1801.1ms TimeCoverageRelationStatistics Valid=514, Invalid=3646, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:52:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79991 states. [2021-06-05 23:52:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79991 to 45346. [2021-06-05 23:52:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45346 states, 45345 states have (on average 4.135715073326717) internal successors, (187534), 45345 states have internal predecessors, (187534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45346 states to 45346 states and 187534 transitions. [2021-06-05 23:52:45,753 INFO L78 Accepts]: Start accepts. Automaton has 45346 states and 187534 transitions. Word has length 39 [2021-06-05 23:52:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:45,753 INFO L482 AbstractCegarLoop]: Abstraction has 45346 states and 187534 transitions. [2021-06-05 23:52:45,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 45346 states and 187534 transitions. [2021-06-05 23:52:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:45,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:45,839 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:46,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable678,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:46,039 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:46,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1941773027, now seen corresponding path program 124 times [2021-06-05 23:52:46,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:46,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488474219] [2021-06-05 23:52:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:46,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:46,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488474219] [2021-06-05 23:52:46,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488474219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:46,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151651380] [2021-06-05 23:52:46,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:46,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:46,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:52:46,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:46,640 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 23:52:46,795 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:46,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 23:52:46,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:46,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:46,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:46,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:52:46,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:46,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:46,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:46,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:46,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:52:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:46,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151651380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:46,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:46,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:46,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358733895] [2021-06-05 23:52:46,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:46,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:46,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:46,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:46,904 INFO L87 Difference]: Start difference. First operand 45346 states and 187534 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:49,039 INFO L93 Difference]: Finished difference Result 77207 states and 314035 transitions. [2021-06-05 23:52:49,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:52:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:49,267 INFO L225 Difference]: With dead ends: 77207 [2021-06-05 23:52:49,267 INFO L226 Difference]: Without dead ends: 76899 [2021-06-05 23:52:49,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1462.7ms TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:52:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76899 states. [2021-06-05 23:52:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76899 to 45258. [2021-06-05 23:52:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45258 states, 45257 states have (on average 4.137216342223303) internal successors, (187238), 45257 states have internal predecessors, (187238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45258 states to 45258 states and 187238 transitions. [2021-06-05 23:52:50,591 INFO L78 Accepts]: Start accepts. Automaton has 45258 states and 187238 transitions. Word has length 39 [2021-06-05 23:52:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:50,592 INFO L482 AbstractCegarLoop]: Abstraction has 45258 states and 187238 transitions. [2021-06-05 23:52:50,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:50,592 INFO L276 IsEmpty]: Start isEmpty. Operand 45258 states and 187238 transitions. [2021-06-05 23:52:50,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:50,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:50,688 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:50,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 23:52:50,889 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2058885455, now seen corresponding path program 125 times [2021-06-05 23:52:50,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:50,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183572786] [2021-06-05 23:52:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:51,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:51,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183572786] [2021-06-05 23:52:51,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183572786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:51,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211116973] [2021-06-05 23:52:51,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:51,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:52:51,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:52:51,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:51,322 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:52:51,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 23:52:51,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:51,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:51,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:51,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 23:52:51,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 23:52:51,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:51,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:51,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:51,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-06-05 23:52:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:51,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211116973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:51,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:51,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:52:51,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281387424] [2021-06-05 23:52:51,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:52:51,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:51,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:52:51,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:51,416 INFO L87 Difference]: Start difference. First operand 45258 states and 187238 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:53,637 INFO L93 Difference]: Finished difference Result 105613 states and 428490 transitions. [2021-06-05 23:52:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:52:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:52:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:53,977 INFO L225 Difference]: With dead ends: 105613 [2021-06-05 23:52:53,977 INFO L226 Difference]: Without dead ends: 105532 [2021-06-05 23:52:53,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1092.5ms TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:52:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105532 states. [2021-06-05 23:52:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105532 to 44901. [2021-06-05 23:52:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44901 states, 44900 states have (on average 4.137750556792873) internal successors, (185785), 44900 states have internal predecessors, (185785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44901 states to 44901 states and 185785 transitions. [2021-06-05 23:52:55,545 INFO L78 Accepts]: Start accepts. Automaton has 44901 states and 185785 transitions. Word has length 39 [2021-06-05 23:52:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:55,545 INFO L482 AbstractCegarLoop]: Abstraction has 44901 states and 185785 transitions. [2021-06-05 23:52:55,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 44901 states and 185785 transitions. [2021-06-05 23:52:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:52:55,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:55,632 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:55,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 23:52:55,832 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:55,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1149977299, now seen corresponding path program 126 times [2021-06-05 23:52:55,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:55,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039579529] [2021-06-05 23:52:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:56,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:56,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039579529] [2021-06-05 23:52:56,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039579529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:56,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069129342] [2021-06-05 23:52:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:56,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:52:56,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:56,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:52:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:56,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:56,681 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 39 treesize of output 55 [2021-06-05 23:52:56,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:56,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:141 [2021-06-05 23:52:56,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:56,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-06-05 23:52:56,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:56,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:56,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2021-06-05 23:52:56,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 23:52:56,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:56,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 23:52:56,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:56,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 23:52:56,875 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:56,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:56,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-06-05 23:52:56,881 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:56,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2021-06-05 23:52:56,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:56,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 23:52:56,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 23:52:56,904 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:56,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 23:52:56,910 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:56,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:56,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-06-05 23:52:56,917 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:56,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:56,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 23:52:56,922 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,061 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 23:52:57,062 INFO L628 ElimStorePlain]: treesize reduction 184, result has 57.2 percent of original size [2021-06-05 23:52:57,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-05 23:52:57,067 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:723, output treesize:241 [2021-06-05 23:52:57,461 INFO L446 ElimStorePlain]: Different costs {1=[q2, v_prenex_273, v_prenex_274, v_prenex_275], 3=[v_prenex_276]} [2021-06-05 23:52:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:57,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 23:52:57,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,557 INFO L628 ElimStorePlain]: treesize reduction 49, result has 73.5 percent of original size [2021-06-05 23:52:57,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:57,565 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:57,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:57,616 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:57,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:52:57,667 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:52:57,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:57,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-06-05 23:52:57,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 23:52:57,814 INFO L628 ElimStorePlain]: treesize reduction 12, result has 90.6 percent of original size [2021-06-05 23:52:57,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 23:52:57,817 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:196, output treesize:106 [2021-06-05 23:52:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:57,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069129342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:57,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:57,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:52:57,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696489133] [2021-06-05 23:52:57,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:52:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:52:57,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:52:57,901 INFO L87 Difference]: Start difference. First operand 44901 states and 185785 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:58,463 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-06-05 23:52:58,657 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-05 23:52:58,987 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 23:52:59,295 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-05 23:52:59,519 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 23:52:59,769 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 23:53:00,284 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-05 23:53:00,553 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-06-05 23:53:00,786 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-06-05 23:53:01,020 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-06-05 23:53:01,480 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 23:53:01,621 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-06-05 23:53:02,621 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-06-05 23:53:03,131 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 23:53:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:03,614 INFO L93 Difference]: Finished difference Result 77772 states and 316424 transitions. [2021-06-05 23:53:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:53:03,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:03,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:03,837 INFO L225 Difference]: With dead ends: 77772 [2021-06-05 23:53:03,837 INFO L226 Difference]: Without dead ends: 77672 [2021-06-05 23:53:03,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 5068.3ms TimeCoverageRelationStatistics Valid=786, Invalid=5534, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:53:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77672 states. [2021-06-05 23:53:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77672 to 45280. [2021-06-05 23:53:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45280 states, 45279 states have (on average 4.136288345590671) internal successors, (187287), 45279 states have internal predecessors, (187287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45280 states to 45280 states and 187287 transitions. [2021-06-05 23:53:05,060 INFO L78 Accepts]: Start accepts. Automaton has 45280 states and 187287 transitions. Word has length 39 [2021-06-05 23:53:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:05,060 INFO L482 AbstractCegarLoop]: Abstraction has 45280 states and 187287 transitions. [2021-06-05 23:53:05,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 45280 states and 187287 transitions. [2021-06-05 23:53:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:05,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:05,144 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:05,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 23:53:05,345 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:05,345 INFO L82 PathProgramCache]: Analyzing trace with hash 648981079, now seen corresponding path program 127 times [2021-06-05 23:53:05,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:05,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706634286] [2021-06-05 23:53:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:05,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706634286] [2021-06-05 23:53:05,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706634286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664186140] [2021-06-05 23:53:05,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:53:05,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:05,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:53:05,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:05,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:05,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:05,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:53:05,804 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:05,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 [2021-06-05 23:53:05,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:05,994 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 23:53:05,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:05,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:05,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-05 23:53:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:06,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664186140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:06,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:06,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:53:06,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017495069] [2021-06-05 23:53:06,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:53:06,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:53:06,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:53:06,066 INFO L87 Difference]: Start difference. First operand 45280 states and 187287 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:07,653 INFO L93 Difference]: Finished difference Result 86531 states and 353997 transitions. [2021-06-05 23:53:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:53:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:07,927 INFO L225 Difference]: With dead ends: 86531 [2021-06-05 23:53:07,928 INFO L226 Difference]: Without dead ends: 86450 [2021-06-05 23:53:07,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:53:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86450 states. [2021-06-05 23:53:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86450 to 45253. [2021-06-05 23:53:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45253 states, 45252 states have (on average 4.139065676655176) internal successors, (187301), 45252 states have internal predecessors, (187301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45253 states to 45253 states and 187301 transitions. [2021-06-05 23:53:09,632 INFO L78 Accepts]: Start accepts. Automaton has 45253 states and 187301 transitions. Word has length 39 [2021-06-05 23:53:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:09,632 INFO L482 AbstractCegarLoop]: Abstraction has 45253 states and 187301 transitions. [2021-06-05 23:53:09,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 45253 states and 187301 transitions. [2021-06-05 23:53:09,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:09,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:09,736 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:09,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable701,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:09,936 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1787565329, now seen corresponding path program 128 times [2021-06-05 23:53:09,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:09,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567899275] [2021-06-05 23:53:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:10,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567899275] [2021-06-05 23:53:10,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567899275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:10,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502104587] [2021-06-05 23:53:10,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:10,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:53:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:10,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:53:10,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:10,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:53:10,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:10,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:10,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:10,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-06-05 23:53:10,440 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:10,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 23:53:10,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:10,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:10,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:10,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-06-05 23:53:10,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:10,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:10,473 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:10,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:10,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:10,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:53:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:10,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502104587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:10,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:10,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:53:10,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505502963] [2021-06-05 23:53:10,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:53:10,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:53:10,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:53:10,515 INFO L87 Difference]: Start difference. First operand 45253 states and 187301 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:13,123 INFO L93 Difference]: Finished difference Result 106336 states and 436045 transitions. [2021-06-05 23:53:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:53:13,123 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:13,456 INFO L225 Difference]: With dead ends: 106336 [2021-06-05 23:53:13,456 INFO L226 Difference]: Without dead ends: 106255 [2021-06-05 23:53:13,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1353.8ms TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:53:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106255 states. [2021-06-05 23:53:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106255 to 45453. [2021-06-05 23:53:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45453 states, 45452 states have (on average 4.139861832262607) internal successors, (188165), 45452 states have internal predecessors, (188165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45453 states to 45453 states and 188165 transitions. [2021-06-05 23:53:14,964 INFO L78 Accepts]: Start accepts. Automaton has 45453 states and 188165 transitions. Word has length 39 [2021-06-05 23:53:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:14,964 INFO L482 AbstractCegarLoop]: Abstraction has 45453 states and 188165 transitions. [2021-06-05 23:53:14,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 45453 states and 188165 transitions. [2021-06-05 23:53:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:15,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:15,048 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:15,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:15,249 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -368572305, now seen corresponding path program 129 times [2021-06-05 23:53:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:15,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158333636] [2021-06-05 23:53:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:15,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:15,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158333636] [2021-06-05 23:53:15,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158333636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:15,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359504948] [2021-06-05 23:53:15,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:15,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:53:15,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:15,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:53:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:15,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:53:15,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:15,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:15,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:15,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-06-05 23:53:16,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:16,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-06-05 23:53:16,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:16,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:53:16,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-06-05 23:53:16,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:16,187 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:16,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:16,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-06-05 23:53:16,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:16,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:16,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:53:16,223 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-06-05 23:53:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:16,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359504948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:16,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:16,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:53:16,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416188762] [2021-06-05 23:53:16,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:53:16,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:16,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:53:16,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:53:16,303 INFO L87 Difference]: Start difference. First operand 45453 states and 188165 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:20,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:20,725 INFO L93 Difference]: Finished difference Result 111175 states and 454293 transitions. [2021-06-05 23:53:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 23:53:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:20,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:21,072 INFO L225 Difference]: With dead ends: 111175 [2021-06-05 23:53:21,072 INFO L226 Difference]: Without dead ends: 111066 [2021-06-05 23:53:21,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 2484.7ms TimeCoverageRelationStatistics Valid=723, Invalid=5757, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:53:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111066 states. [2021-06-05 23:53:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111066 to 46196. [2021-06-05 23:53:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46196 states, 46195 states have (on average 4.138694663924667) internal successors, (191187), 46195 states have internal predecessors, (191187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46196 states to 46196 states and 191187 transitions. [2021-06-05 23:53:22,885 INFO L78 Accepts]: Start accepts. Automaton has 46196 states and 191187 transitions. Word has length 39 [2021-06-05 23:53:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:22,885 INFO L482 AbstractCegarLoop]: Abstraction has 46196 states and 191187 transitions. [2021-06-05 23:53:22,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 46196 states and 191187 transitions. [2021-06-05 23:53:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:22,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:22,975 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:23,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-06-05 23:53:23,176 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:23,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2117435505, now seen corresponding path program 130 times [2021-06-05 23:53:23,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:23,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786174194] [2021-06-05 23:53:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:23,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:23,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786174194] [2021-06-05 23:53:23,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786174194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:23,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497428286] [2021-06-05 23:53:23,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:23,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:53:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:23,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:53:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:23,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:53:23,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:23,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:23,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:23,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 23:53:23,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:23,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:53:23,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:23,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:23,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:23,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:53:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:23,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497428286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:23,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:23,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:53:23,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230767571] [2021-06-05 23:53:23,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:53:23,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:53:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:53:23,710 INFO L87 Difference]: Start difference. First operand 46196 states and 191187 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:26,068 INFO L93 Difference]: Finished difference Result 119473 states and 484851 transitions. [2021-06-05 23:53:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:53:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:26,447 INFO L225 Difference]: With dead ends: 119473 [2021-06-05 23:53:26,447 INFO L226 Difference]: Without dead ends: 119340 [2021-06-05 23:53:26,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1192.1ms TimeCoverageRelationStatistics Valid=427, Invalid=2329, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:53:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119340 states. [2021-06-05 23:53:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119340 to 45467. [2021-06-05 23:53:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45467 states, 45466 states have (on average 4.142238155984692) internal successors, (188331), 45466 states have internal predecessors, (188331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45467 states to 45467 states and 188331 transitions. [2021-06-05 23:53:28,446 INFO L78 Accepts]: Start accepts. Automaton has 45467 states and 188331 transitions. Word has length 39 [2021-06-05 23:53:28,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:28,446 INFO L482 AbstractCegarLoop]: Abstraction has 45467 states and 188331 transitions. [2021-06-05 23:53:28,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:28,446 INFO L276 IsEmpty]: Start isEmpty. Operand 45467 states and 188331 transitions. [2021-06-05 23:53:28,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:28,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:28,545 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:28,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-06-05 23:53:28,746 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1108442007, now seen corresponding path program 131 times [2021-06-05 23:53:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:28,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984514238] [2021-06-05 23:53:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:29,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:29,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984514238] [2021-06-05 23:53:29,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984514238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:29,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504152982] [2021-06-05 23:53:29,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:29,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:53:29,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:53:29,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:29,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-06-05 23:53:29,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:53:29,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:29,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:47 [2021-06-05 23:53:29,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:53:29,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:29,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:29,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:53:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:29,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:29,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:29,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-06-05 23:53:29,474 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:29,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:29,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:29,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:3 [2021-06-05 23:53:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:29,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504152982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:29,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:29,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:53:29,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680630748] [2021-06-05 23:53:29,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:53:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:53:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:53:29,514 INFO L87 Difference]: Start difference. First operand 45467 states and 188331 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:32,559 INFO L93 Difference]: Finished difference Result 75651 states and 307501 transitions. [2021-06-05 23:53:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:53:32,560 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:32,775 INFO L225 Difference]: With dead ends: 75651 [2021-06-05 23:53:32,775 INFO L226 Difference]: Without dead ends: 75362 [2021-06-05 23:53:32,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2222.0ms TimeCoverageRelationStatistics Valid=465, Invalid=3317, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:53:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75362 states. [2021-06-05 23:53:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75362 to 45965. [2021-06-05 23:53:33,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45965 states, 45964 states have (on average 4.136672178226438) internal successors, (190138), 45964 states have internal predecessors, (190138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45965 states to 45965 states and 190138 transitions. [2021-06-05 23:53:33,927 INFO L78 Accepts]: Start accepts. Automaton has 45965 states and 190138 transitions. Word has length 39 [2021-06-05 23:53:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:33,927 INFO L482 AbstractCegarLoop]: Abstraction has 45965 states and 190138 transitions. [2021-06-05 23:53:33,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45965 states and 190138 transitions. [2021-06-05 23:53:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:34,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:34,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:34,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:34,213 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash 47383017, now seen corresponding path program 132 times [2021-06-05 23:53:34,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:34,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398770918] [2021-06-05 23:53:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:34,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:34,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398770918] [2021-06-05 23:53:34,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398770918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:34,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828495725] [2021-06-05 23:53:34,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:34,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:53:34,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:34,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:53:34,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:34,814 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:34,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 23:53:34,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:34,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:34,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:34,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:33 [2021-06-05 23:53:35,067 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 23:53:35,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-06-05 23:53:35,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:35,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:35,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:106 [2021-06-05 23:53:35,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:35,457 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:35,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,484 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 23:53:35,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 13 [2021-06-05 23:53:35,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:35,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:53:35,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:70, output treesize:55 [2021-06-05 23:53:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:35,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828495725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:35,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:35,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:53:35,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497739932] [2021-06-05 23:53:35,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:53:35,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:35,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:53:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:53:35,599 INFO L87 Difference]: Start difference. First operand 45965 states and 190138 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:40,385 INFO L93 Difference]: Finished difference Result 90369 states and 363953 transitions. [2021-06-05 23:53:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:53:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:40,803 INFO L225 Difference]: With dead ends: 90369 [2021-06-05 23:53:40,803 INFO L226 Difference]: Without dead ends: 89924 [2021-06-05 23:53:40,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 3670.1ms TimeCoverageRelationStatistics Valid=1106, Invalid=5536, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 23:53:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89924 states. [2021-06-05 23:53:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89924 to 45929. [2021-06-05 23:53:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45929 states, 45928 states have (on average 4.137084131684375) internal successors, (190008), 45928 states have internal predecessors, (190008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45929 states to 45929 states and 190008 transitions. [2021-06-05 23:53:42,186 INFO L78 Accepts]: Start accepts. Automaton has 45929 states and 190008 transitions. Word has length 39 [2021-06-05 23:53:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:42,186 INFO L482 AbstractCegarLoop]: Abstraction has 45929 states and 190008 transitions. [2021-06-05 23:53:42,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 45929 states and 190008 transitions. [2021-06-05 23:53:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:42,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:42,271 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:42,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:42,472 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1169439237, now seen corresponding path program 133 times [2021-06-05 23:53:42,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:42,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434562960] [2021-06-05 23:53:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:42,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:42,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434562960] [2021-06-05 23:53:42,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434562960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852535137] [2021-06-05 23:53:42,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:53:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:42,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:53:42,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:42,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:42,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:42,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:53:43,022 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:43,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 23:53:43,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:43,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:43,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:43,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:53:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:43,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852535137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:43,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:43,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:53:43,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241975323] [2021-06-05 23:53:43,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:53:43,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:43,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:53:43,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:53:43,068 INFO L87 Difference]: Start difference. First operand 45929 states and 190008 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:45,284 INFO L93 Difference]: Finished difference Result 94789 states and 384231 transitions. [2021-06-05 23:53:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:53:45,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:45,578 INFO L225 Difference]: With dead ends: 94789 [2021-06-05 23:53:45,578 INFO L226 Difference]: Without dead ends: 94492 [2021-06-05 23:53:45,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1125.9ms TimeCoverageRelationStatistics Valid=373, Invalid=2077, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:53:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94492 states. [2021-06-05 23:53:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94492 to 45983. [2021-06-05 23:53:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45983 states, 45982 states have (on average 4.137205863163847) internal successors, (190237), 45982 states have internal predecessors, (190237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45983 states to 45983 states and 190237 transitions. [2021-06-05 23:53:47,064 INFO L78 Accepts]: Start accepts. Automaton has 45983 states and 190237 transitions. Word has length 39 [2021-06-05 23:53:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:47,064 INFO L482 AbstractCegarLoop]: Abstraction has 45983 states and 190237 transitions. [2021-06-05 23:53:47,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 45983 states and 190237 transitions. [2021-06-05 23:53:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:47,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:47,151 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:47,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-05 23:53:47,368 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:47,381 INFO L82 PathProgramCache]: Analyzing trace with hash -965518491, now seen corresponding path program 134 times [2021-06-05 23:53:47,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:47,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373404302] [2021-06-05 23:53:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:47,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:47,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373404302] [2021-06-05 23:53:47,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373404302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:47,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727081988] [2021-06-05 23:53:47,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:47,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:53:47,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:47,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:53:47,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:48,080 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 23:53:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:53:48,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:48,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:48,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:48,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:53:48,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:48,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:48,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:53:48,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:48,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:48,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:53:48,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:73 [2021-06-05 23:53:48,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:53:48,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 23:53:48,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:48,307 INFO L628 ElimStorePlain]: treesize reduction 5, result has 72.2 percent of original size [2021-06-05 23:53:48,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:48,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 23:53:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:48,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727081988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:48,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:48,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:53:48,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316626034] [2021-06-05 23:53:48,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:53:48,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:48,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:53:48,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:53:48,350 INFO L87 Difference]: Start difference. First operand 45983 states and 190237 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:50,802 INFO L93 Difference]: Finished difference Result 83379 states and 338399 transitions. [2021-06-05 23:53:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:53:50,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:51,054 INFO L225 Difference]: With dead ends: 83379 [2021-06-05 23:53:51,054 INFO L226 Difference]: Without dead ends: 83185 [2021-06-05 23:53:51,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1593.8ms TimeCoverageRelationStatistics Valid=387, Invalid=2265, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:53:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83185 states. [2021-06-05 23:53:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83185 to 46077. [2021-06-05 23:53:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46077 states, 46076 states have (on average 4.136600399340221) internal successors, (190598), 46076 states have internal predecessors, (190598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46077 states to 46077 states and 190598 transitions. [2021-06-05 23:53:52,452 INFO L78 Accepts]: Start accepts. Automaton has 46077 states and 190598 transitions. Word has length 39 [2021-06-05 23:53:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:52,452 INFO L482 AbstractCegarLoop]: Abstraction has 46077 states and 190598 transitions. [2021-06-05 23:53:52,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 46077 states and 190598 transitions. [2021-06-05 23:53:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:52,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:52,565 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:52,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-06-05 23:53:52,781 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash -694249073, now seen corresponding path program 135 times [2021-06-05 23:53:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:52,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514466822] [2021-06-05 23:53:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:53,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:53,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514466822] [2021-06-05 23:53:53,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514466822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:53,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650058056] [2021-06-05 23:53:53,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:53,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:53:53,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:53,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:53:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:53,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:53:53,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:53,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:53,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:53,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:36 [2021-06-05 23:53:53,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:53,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:53,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 23:53:53,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:53,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:53,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 23:53:53,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-06-05 23:53:53,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:53:53,444 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:53,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:53,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:53:53,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:53:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:53,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650058056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:53,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:53,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:53:53,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164536521] [2021-06-05 23:53:53,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:53:53,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:53,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:53:53,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:53:53,492 INFO L87 Difference]: Start difference. First operand 46077 states and 190598 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:58,091 INFO L93 Difference]: Finished difference Result 74119 states and 302105 transitions. [2021-06-05 23:53:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:53:58,091 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:53:58,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:58,310 INFO L225 Difference]: With dead ends: 74119 [2021-06-05 23:53:58,310 INFO L226 Difference]: Without dead ends: 73700 [2021-06-05 23:53:58,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 2447.3ms TimeCoverageRelationStatistics Valid=611, Invalid=5551, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:53:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73700 states. [2021-06-05 23:53:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73700 to 45849. [2021-06-05 23:53:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45849 states, 45848 states have (on average 4.138784679811551) internal successors, (189755), 45848 states have internal predecessors, (189755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45849 states to 45849 states and 189755 transitions. [2021-06-05 23:53:59,491 INFO L78 Accepts]: Start accepts. Automaton has 45849 states and 189755 transitions. Word has length 39 [2021-06-05 23:53:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:59,491 INFO L482 AbstractCegarLoop]: Abstraction has 45849 states and 189755 transitions. [2021-06-05 23:53:59,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 45849 states and 189755 transitions. [2021-06-05 23:53:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:53:59,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:59,579 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:59,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:59,780 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:59,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1627790633, now seen corresponding path program 136 times [2021-06-05 23:53:59,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:59,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570056574] [2021-06-05 23:53:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:00,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:00,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570056574] [2021-06-05 23:54:00,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570056574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:00,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803002153] [2021-06-05 23:54:00,061 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:00,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:54:00,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:54:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:00,283 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:54:00,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 23:54:00,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:00,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:00,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:00,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 23:54:00,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:54:00,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:00,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:00,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:00,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:54:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:00,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803002153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:00,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:00,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:54:00,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170254488] [2021-06-05 23:54:00,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:54:00,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:54:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:54:00,385 INFO L87 Difference]: Start difference. First operand 45849 states and 189755 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:01,433 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-06-05 23:54:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:02,175 INFO L93 Difference]: Finished difference Result 75742 states and 308462 transitions. [2021-06-05 23:54:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:54:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:02,395 INFO L225 Difference]: With dead ends: 75742 [2021-06-05 23:54:02,395 INFO L226 Difference]: Without dead ends: 75467 [2021-06-05 23:54:02,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1273.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:54:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75467 states. [2021-06-05 23:54:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75467 to 45869. [2021-06-05 23:54:03,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45869 states, 45868 states have (on average 4.138506148077091) internal successors, (189825), 45868 states have internal predecessors, (189825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45869 states to 45869 states and 189825 transitions. [2021-06-05 23:54:03,648 INFO L78 Accepts]: Start accepts. Automaton has 45869 states and 189825 transitions. Word has length 39 [2021-06-05 23:54:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:03,649 INFO L482 AbstractCegarLoop]: Abstraction has 45869 states and 189825 transitions. [2021-06-05 23:54:03,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 45869 states and 189825 transitions. [2021-06-05 23:54:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:03,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:03,733 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:03,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-05 23:54:03,933 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:03,933 INFO L82 PathProgramCache]: Analyzing trace with hash 521991405, now seen corresponding path program 137 times [2021-06-05 23:54:03,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:03,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367327300] [2021-06-05 23:54:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:04,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:04,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367327300] [2021-06-05 23:54:04,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367327300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:04,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201913865] [2021-06-05 23:54:04,225 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:04,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:54:04,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:54:04,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:04,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:04,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:04,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-06-05 23:54:04,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:54:04,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:04,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:04,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:48 [2021-06-05 23:54:04,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:54:04,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:04,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:04,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:04,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-06-05 23:54:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:04,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201913865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:04,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:04,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:54:04,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867711763] [2021-06-05 23:54:04,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:54:04,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:54:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:54:04,823 INFO L87 Difference]: Start difference. First operand 45869 states and 189825 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:07,648 INFO L93 Difference]: Finished difference Result 74959 states and 304862 transitions. [2021-06-05 23:54:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:54:07,649 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:07,867 INFO L225 Difference]: With dead ends: 74959 [2021-06-05 23:54:07,868 INFO L226 Difference]: Without dead ends: 74670 [2021-06-05 23:54:07,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1986.4ms TimeCoverageRelationStatistics Valid=469, Invalid=3191, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:54:07,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74670 states. [2021-06-05 23:54:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74670 to 46155. [2021-06-05 23:54:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46155 states, 46154 states have (on average 4.134636217879274) internal successors, (190830), 46154 states have internal predecessors, (190830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46155 states to 46155 states and 190830 transitions. [2021-06-05 23:54:09,097 INFO L78 Accepts]: Start accepts. Automaton has 46155 states and 190830 transitions. Word has length 39 [2021-06-05 23:54:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:09,097 INFO L482 AbstractCegarLoop]: Abstraction has 46155 states and 190830 transitions. [2021-06-05 23:54:09,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 46155 states and 190830 transitions. [2021-06-05 23:54:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:09,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:09,183 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:09,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable763 [2021-06-05 23:54:09,384 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash 432208255, now seen corresponding path program 138 times [2021-06-05 23:54:09,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:09,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451685186] [2021-06-05 23:54:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:09,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451685186] [2021-06-05 23:54:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451685186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287546404] [2021-06-05 23:54:09,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:09,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:54:09,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:09,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:54:09,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:10,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:10,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 23:54:10,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:10,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:54:10,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:65, output treesize:43 [2021-06-05 23:54:10,251 INFO L446 ElimStorePlain]: Different costs {0=[f], 2=[v_prenex_282]} [2021-06-05 23:54:10,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 23:54:10,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:10,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:10,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:54:10,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 23:54:10,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:10,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:10,274 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:69, output treesize:19 [2021-06-05 23:54:10,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-06-05 23:54:10,332 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:10,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:10,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:10,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 23:54:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:10,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287546404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:10,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:10,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:54:10,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199803957] [2021-06-05 23:54:10,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:54:10,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:54:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:54:10,389 INFO L87 Difference]: Start difference. First operand 46155 states and 190830 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:11,023 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 23:54:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:16,143 INFO L93 Difference]: Finished difference Result 96033 states and 387034 transitions. [2021-06-05 23:54:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 23:54:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:16,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:16,424 INFO L225 Difference]: With dead ends: 96033 [2021-06-05 23:54:16,424 INFO L226 Difference]: Without dead ends: 95543 [2021-06-05 23:54:16,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3425 ImplicationChecksByTransitivity, 4346.5ms TimeCoverageRelationStatistics Valid=1383, Invalid=9122, Unknown=1, NotChecked=0, Total=10506 [2021-06-05 23:54:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95543 states. [2021-06-05 23:54:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95543 to 46197. [2021-06-05 23:54:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46197 states, 46196 states have (on average 4.133518053511127) internal successors, (190952), 46196 states have internal predecessors, (190952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46197 states to 46197 states and 190952 transitions. [2021-06-05 23:54:17,770 INFO L78 Accepts]: Start accepts. Automaton has 46197 states and 190952 transitions. Word has length 39 [2021-06-05 23:54:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:17,770 INFO L482 AbstractCegarLoop]: Abstraction has 46197 states and 190952 transitions. [2021-06-05 23:54:17,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46197 states and 190952 transitions. [2021-06-05 23:54:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:18,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:18,156 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:18,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-05 23:54:18,373 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash 198290691, now seen corresponding path program 139 times [2021-06-05 23:54:18,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:18,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785198362] [2021-06-05 23:54:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:18,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:18,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785198362] [2021-06-05 23:54:18,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785198362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:18,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616071328] [2021-06-05 23:54:18,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:18,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:54:18,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:18,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 23:54:18,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:18,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:18,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:18,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-06-05 23:54:18,960 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:54:18,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 27 [2021-06-05 23:54:18,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:18,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:18,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:18,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-06-05 23:54:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:19,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616071328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:19,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:19,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-05 23:54:19,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549069270] [2021-06-05 23:54:19,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:54:19,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:19,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:54:19,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:54:19,001 INFO L87 Difference]: Start difference. First operand 46197 states and 190952 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:20,850 INFO L93 Difference]: Finished difference Result 94699 states and 383708 transitions. [2021-06-05 23:54:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:54:20,851 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:21,130 INFO L225 Difference]: With dead ends: 94699 [2021-06-05 23:54:21,130 INFO L226 Difference]: Without dead ends: 94446 [2021-06-05 23:54:21,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1064.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:54:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94446 states. [2021-06-05 23:54:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94446 to 46251. [2021-06-05 23:54:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46251 states, 46250 states have (on average 4.1336432432432435) internal successors, (191181), 46250 states have internal predecessors, (191181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46251 states to 46251 states and 191181 transitions. [2021-06-05 23:54:22,520 INFO L78 Accepts]: Start accepts. Automaton has 46251 states and 191181 transitions. Word has length 39 [2021-06-05 23:54:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:22,520 INFO L482 AbstractCegarLoop]: Abstraction has 46251 states and 191181 transitions. [2021-06-05 23:54:22,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 46251 states and 191181 transitions. [2021-06-05 23:54:22,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:54:22,608 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:22,608 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:22,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 23:54:22,808 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash 402211437, now seen corresponding path program 140 times [2021-06-05 23:54:22,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:22,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662863306] [2021-06-05 23:54:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:23,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:23,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662863306] [2021-06-05 23:54:23,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662863306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:23,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077311731] [2021-06-05 23:54:23,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:23,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:54:23,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:23,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:54:23,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:23,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-06-05 23:54:23,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:23,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:23,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:23,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-06-05 23:54:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:23,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:23,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 23:54:23,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:23,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:23,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:54:23,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:73 [2021-06-05 23:54:23,411 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:54:23,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 23:54:23,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:54:23,420 INFO L628 ElimStorePlain]: treesize reduction 5, result has 72.2 percent of original size [2021-06-05 23:54:23,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:54:23,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 23:54:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:23,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077311731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:23,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:23,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 23:54:23,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056563504] [2021-06-05 23:54:23,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:54:23,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:23,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:54:23,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:54:23,464 INFO L87 Difference]: Start difference. First operand 46251 states and 191181 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:24,219 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-06-05 23:54:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:25,834 INFO L93 Difference]: Finished difference Result 81180 states and 329463 transitions. [2021-06-05 23:54:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:54:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 23:54:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:26,067 INFO L225 Difference]: With dead ends: 81180 [2021-06-05 23:54:26,067 INFO L226 Difference]: Without dead ends: 80986 [2021-06-05 23:54:26,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1465.3ms TimeCoverageRelationStatistics Valid=388, Invalid=2062, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:54:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80986 states. Received shutdown request... [2021-06-05 23:54:26,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:26,861 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:54:26,862 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:54:26,863 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:54:26,864 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:54:26 BasicIcfg [2021-06-05 23:54:26,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:54:26,864 INFO L168 Benchmark]: Toolchain (without parser) took 754628.90 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 327.4 MB in the beginning and 12.6 GB in the end (delta: -12.3 GB). Peak memory consumption was 3.9 GB. Max. memory is 16.0 GB. [2021-06-05 23:54:26,864 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 348.1 MB. Free memory was 328.6 MB in the beginning and 328.6 MB in the end (delta: 76.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:54:26,864 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.38 ms. Allocated memory is still 348.1 MB. Free memory was 327.4 MB in the beginning and 325.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:54:26,864 INFO L168 Benchmark]: Boogie Preprocessor took 21.23 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 324.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 23:54:26,864 INFO L168 Benchmark]: RCFGBuilder took 258.57 ms. Allocated memory is still 348.1 MB. Free memory was 324.8 MB in the beginning and 309.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 23:54:26,864 INFO L168 Benchmark]: TraceAbstraction took 754326.45 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 309.1 MB in the beginning and 12.6 GB in the end (delta: -12.3 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-06-05 23:54:26,865 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 0.09 ms. Allocated memory is still 348.1 MB. Free memory was 328.6 MB in the beginning and 328.6 MB in the end (delta: 76.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.38 ms. Allocated memory is still 348.1 MB. Free memory was 327.4 MB in the beginning and 325.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.23 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 324.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 258.57 ms. Allocated memory is still 348.1 MB. Free memory was 324.8 MB in the beginning and 309.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 754326.45 ms. Allocated memory was 348.1 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 309.1 MB in the beginning and 12.6 GB in the end (delta: -12.3 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 754234.8ms, OverallIterations: 149, TraceHistogramMax: 2, EmptinessCheckTime: 12009.1ms, AutomataDifference: 419274.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 51.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11178 SDtfs, 70883 SDslu, 131635 SDs, 0 SdLazy, 243467 SolverSat, 14325 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 113109.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11186 GetRequests, 3813 SyntacticMatches, 172 SemanticMatches, 7201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128696 ImplicationChecksByTransitivity, 260768.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46251occurred in iteration=148, InterpolantAutomatonStates: 5426, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 169876.0ms AutomataMinimizationTime, 149 MinimizatonAttempts, 5294673 StatesRemovedByMinimization, 148 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 598.2ms SsaConstructionTime, 2650.6ms SatisfiabilityAnalysisTime, 117425.5ms InterpolantComputationTime, 10969 NumberOfCodeBlocks, 10965 NumberOfCodeBlocksAsserted, 532 NumberOfCheckSat, 10677 ConstructedInterpolants, 401 QuantifiedInterpolants, 275454 SizeOfPredicates, 1089 NumberOfNonLiveVariables, 16304 ConjunctsInSsa, 5528 ConjunctsInUnsatCore, 292 InterpolantComputations, 8 PerfectInterpolantSequences, 224/4728 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown