/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/simple-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:52:21,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:52:21,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:52:21,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:52:21,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:52:21,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:52:21,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:52:21,828 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 05:52:21,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:52:21,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:52:21,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:52:21,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:52:21,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:52:21,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:52:21,857 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:52:21,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:52:21,857 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:52:21,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:52:21,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:52:21,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:52:21,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:52:21,859 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:52:21,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:52:21,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:52:22,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:52:22,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:52:22,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:52:22,124 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:52:22,125 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:52:22,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl [2021-06-05 05:52:22,125 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl' [2021-06-05 05:52:22,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:52:22,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:52:22,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:52:22,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:52:22,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:52:22,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:52:22,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:52:22,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:52:22,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:52:22,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/1) ... [2021-06-05 05:52:22,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:52:22,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:52:22,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:52:22,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:52:22,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (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 05:52:22,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:52:22,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:52:22,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:52:22,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:52:22,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:52:22,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:52:22,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:52:22,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:52:22,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:52:22,264 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:52:22,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:52:22,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:52:22,266 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 05:52:22,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:52:22,419 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:52:22,420 INFO L202 PluginConnector]: Adding new model simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:52:22 BoogieIcfgContainer [2021-06-05 05:52:22,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:52:22,430 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:52:22,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:52:22,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:52:22,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:52:22" (1/2) ... [2021-06-05 05:52:22,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77b14ff5 and model type simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:52:22, skipping insertion in model container [2021-06-05 05:52:22,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:52:22" (2/2) ... [2021-06-05 05:52:22,433 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.bpl [2021-06-05 05:52:22,437 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:52:22,437 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:52:22,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:52:22,438 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:52:22,475 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 05:52:22,500 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 05:52:22,512 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:52:22,512 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:52:22,512 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:52:22,512 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:52:22,512 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:52:22,513 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:52:22,513 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:52:22,513 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:52:22,520 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2021-06-05 05:52:22,536 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:52:22,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:22,544 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:22,544 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash -514212460, now seen corresponding path program 1 times [2021-06-05 05:52:22,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:22,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8884396] [2021-06-05 05:52:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:22,798 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 05:52:22,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:22,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8884396] [2021-06-05 05:52:22,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8884396] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:52:22,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:52:22,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:52:22,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049892454] [2021-06-05 05:52:22,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:52:22,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:22,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:52:22,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:52:22,820 INFO L87 Difference]: Start difference. First operand has 133 states, 131 states have (on average 3.015267175572519) internal successors, (395), 132 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:22,945 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2021-06-05 05:52:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:52:22,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 05:52:22,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:22,959 INFO L225 Difference]: With dead ends: 257 [2021-06-05 05:52:22,959 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 05:52:22,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:52:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 05:52:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-06-05 05:52:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2021-06-05 05:52:23,017 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2021-06-05 05:52:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:23,018 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2021-06-05 05:52:23,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2021-06-05 05:52:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:52:23,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:23,020 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:23,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:52:23,020 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash -610054924, now seen corresponding path program 1 times [2021-06-05 05:52:23,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:23,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218205302] [2021-06-05 05:52:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:23,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:23,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218205302] [2021-06-05 05:52:23,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218205302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:23,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921586675] [2021-06-05 05:52:23,078 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 05:52:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:52:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:23,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921586675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:23,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:23,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 05:52:23,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596873037] [2021-06-05 05:52:23,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:52:23,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:23,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:52:23,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:52:23,229 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 05:52:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:23,281 INFO L93 Difference]: Finished difference Result 376 states and 1113 transitions. [2021-06-05 05:52:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:52:23,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 18 [2021-06-05 05:52:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:23,283 INFO L225 Difference]: With dead ends: 376 [2021-06-05 05:52:23,284 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 05:52:23,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:52:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 05:52:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 181. [2021-06-05 05:52:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.077777777777778) internal successors, (554), 180 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 554 transitions. [2021-06-05 05:52:23,295 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 554 transitions. Word has length 18 [2021-06-05 05:52:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:23,295 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 554 transitions. [2021-06-05 05:52:23,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 05:52:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 554 transitions. [2021-06-05 05:52:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:52:23,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:23,296 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:23,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 05:52:23,507 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash 814452718, now seen corresponding path program 2 times [2021-06-05 05:52:23,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:23,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650217032] [2021-06-05 05:52:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:23,534 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 05:52:23,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:23,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650217032] [2021-06-05 05:52:23,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650217032] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:52:23,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:52:23,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:52:23,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001176523] [2021-06-05 05:52:23,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:52:23,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:23,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:52:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:52:23,536 INFO L87 Difference]: Start difference. First operand 181 states and 554 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:23,577 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2021-06-05 05:52:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:52:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 05:52:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:23,583 INFO L225 Difference]: With dead ends: 221 [2021-06-05 05:52:23,583 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 05:52:23,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:52:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 05:52:23,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2021-06-05 05:52:23,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0297619047619047) internal successors, (509), 168 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 509 transitions. [2021-06-05 05:52:23,594 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 509 transitions. Word has length 18 [2021-06-05 05:52:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:23,594 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 509 transitions. [2021-06-05 05:52:23,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 509 transitions. [2021-06-05 05:52:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:52:23,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:23,595 INFO L521 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 05:52:23,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:52:23,595 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:23,596 INFO L82 PathProgramCache]: Analyzing trace with hash 507661300, now seen corresponding path program 1 times [2021-06-05 05:52:23,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:23,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459236945] [2021-06-05 05:52:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:23,628 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 05:52:23,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:23,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459236945] [2021-06-05 05:52:23,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459236945] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:52:23,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:52:23,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:52:23,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845597921] [2021-06-05 05:52:23,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:52:23,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:52:23,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:52:23,630 INFO L87 Difference]: Start difference. First operand 169 states and 509 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:23,637 INFO L93 Difference]: Finished difference Result 239 states and 717 transitions. [2021-06-05 05:52:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:52:23,638 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 05:52:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:23,639 INFO L225 Difference]: With dead ends: 239 [2021-06-05 05:52:23,639 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 05:52:23,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:52:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 05:52:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-06-05 05:52:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2021-06-05 05:52:23,649 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 19 [2021-06-05 05:52:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:23,650 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2021-06-05 05:52:23,650 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 05:52:23,650 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2021-06-05 05:52:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:52:23,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:23,653 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:23,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:52:23,654 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1163798226, now seen corresponding path program 1 times [2021-06-05 05:52:23,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:23,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471765677] [2021-06-05 05:52:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:23,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471765677] [2021-06-05 05:52:23,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471765677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173440424] [2021-06-05 05:52:23,690 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 05:52:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:23,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:52:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:23,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173440424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:23,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:23,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 05:52:23,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128968767] [2021-06-05 05:52:23,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:52:23,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:23,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:52:23,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:52:23,766 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:23,828 INFO L93 Difference]: Finished difference Result 280 states and 853 transitions. [2021-06-05 05:52:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:52:23,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:52:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:23,830 INFO L225 Difference]: With dead ends: 280 [2021-06-05 05:52:23,830 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 05:52:23,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:52:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 05:52:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-06-05 05:52:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-06-05 05:52:23,836 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2021-06-05 05:52:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:23,836 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-06-05 05:52:23,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-06-05 05:52:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:52:23,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:23,837 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:24,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:24,056 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1608131998, now seen corresponding path program 1 times [2021-06-05 05:52:24,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:24,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952731043] [2021-06-05 05:52:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:24,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952731043] [2021-06-05 05:52:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952731043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967274939] [2021-06-05 05:52:24,164 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 05:52:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:24,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:52:24,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:24,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 05:52:24,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:24,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:24,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 05:52:24,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:24,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:24,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:24,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 05:52:24,359 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 05:52:24,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:24,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:24,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:24,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 05:52:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:24,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967274939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:24,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:24,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:52:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646079233] [2021-06-05 05:52:24,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:52:24,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:24,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:52:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:52:24,415 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 05:52:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:24,660 INFO L93 Difference]: Finished difference Result 381 states and 1115 transitions. [2021-06-05 05:52:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:52:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 23 [2021-06-05 05:52:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:24,662 INFO L225 Difference]: With dead ends: 381 [2021-06-05 05:52:24,662 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 05:52:24,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:52:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 05:52:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 294. [2021-06-05 05:52:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9829351535836177) internal successors, (874), 293 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 874 transitions. [2021-06-05 05:52:24,669 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 874 transitions. Word has length 23 [2021-06-05 05:52:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:24,669 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 874 transitions. [2021-06-05 05:52:24,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 05:52:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 874 transitions. [2021-06-05 05:52:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:52:24,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:24,670 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:24,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:24,871 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:24,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:24,871 INFO L82 PathProgramCache]: Analyzing trace with hash -108579982, now seen corresponding path program 2 times [2021-06-05 05:52:24,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:24,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554446401] [2021-06-05 05:52:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:24,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:24,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554446401] [2021-06-05 05:52:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554446401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335995525] [2021-06-05 05:52:24,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:25,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:25,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:25,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:52:25,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:25,075 INFO L446 ElimStorePlain]: Different costs {0=[v_C_15], 1=[A]} [2021-06-05 05:52:25,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:25,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:25,089 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 17 treesize of output 13 [2021-06-05 05:52:25,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:25,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:26 [2021-06-05 05:52:25,128 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 05:52:25,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:25,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 05:52:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:25,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335995525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:25,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:25,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:52:25,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119774307] [2021-06-05 05:52:25,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:52:25,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:52:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:52:25,190 INFO L87 Difference]: Start difference. First operand 294 states and 874 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 05:52:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:25,415 INFO L93 Difference]: Finished difference Result 588 states and 1800 transitions. [2021-06-05 05:52:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:52:25,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 23 [2021-06-05 05:52:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:25,418 INFO L225 Difference]: With dead ends: 588 [2021-06-05 05:52:25,418 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 05:52:25,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:52:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 05:52:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 314. [2021-06-05 05:52:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2021-06-05 05:52:25,426 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2021-06-05 05:52:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:25,426 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2021-06-05 05:52:25,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 05:52:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2021-06-05 05:52:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:52:25,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:25,427 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:25,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:25,641 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 627268620, now seen corresponding path program 3 times [2021-06-05 05:52:25,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:25,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144773623] [2021-06-05 05:52:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:25,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:25,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144773623] [2021-06-05 05:52:25,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144773623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:25,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925308154] [2021-06-05 05:52:25,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:25,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:52:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:25,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:52:25,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:25,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:25,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:25,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:52:25,856 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 05:52:25,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:25,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-06-05 05:52:25,886 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 05:52:25,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:25,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:25,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 05:52:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:25,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925308154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:25,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:25,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:52:25,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396541989] [2021-06-05 05:52:25,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:52:25,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:25,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:52:25,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:52:25,934 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:26,242 INFO L93 Difference]: Finished difference Result 534 states and 1651 transitions. [2021-06-05 05:52:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:52:26,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:52:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:26,246 INFO L225 Difference]: With dead ends: 534 [2021-06-05 05:52:26,246 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 05:52:26,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:52:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 05:52:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 366. [2021-06-05 05:52:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-06-05 05:52:26,254 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-06-05 05:52:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:26,255 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-06-05 05:52:26,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-06-05 05:52:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:52:26,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:26,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:26,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:26,469 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash -793182992, now seen corresponding path program 4 times [2021-06-05 05:52:26,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:26,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389391030] [2021-06-05 05:52:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:26,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:26,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389391030] [2021-06-05 05:52:26,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389391030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:26,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779381850] [2021-06-05 05:52:26,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:26,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:26,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:26,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:52:26,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:26,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:26,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:26,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:26,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:26,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:52:26,698 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 15 treesize of output 11 [2021-06-05 05:52:26,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:26,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:26,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:26,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:17 [2021-06-05 05:52:26,724 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 05:52:26,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:26,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:26,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:26,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-06-05 05:52:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:26,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779381850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:26,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:26,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:52:26,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512091743] [2021-06-05 05:52:26,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:52:26,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:52:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:52:26,779 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:26,952 INFO L93 Difference]: Finished difference Result 573 states and 1778 transitions. [2021-06-05 05:52:26,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:52:26,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:52:26,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:26,955 INFO L225 Difference]: With dead ends: 573 [2021-06-05 05:52:26,955 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 05:52:26,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:52:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 05:52:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 366. [2021-06-05 05:52:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-06-05 05:52:26,963 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-06-05 05:52:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:26,963 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-06-05 05:52:26,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-06-05 05:52:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:52:26,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:26,964 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:27,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:27,182 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:27,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1481835136, now seen corresponding path program 5 times [2021-06-05 05:52:27,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:27,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150477129] [2021-06-05 05:52:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:27,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:27,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150477129] [2021-06-05 05:52:27,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150477129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:27,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171588960] [2021-06-05 05:52:27,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:27,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:52:27,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:27,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:52:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171588960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:27,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:27,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:52:27,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421719050] [2021-06-05 05:52:27,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:52:27,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:27,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:52:27,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:52:27,339 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:27,437 INFO L93 Difference]: Finished difference Result 802 states and 2408 transitions. [2021-06-05 05:52:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:52:27,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:52:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:27,441 INFO L225 Difference]: With dead ends: 802 [2021-06-05 05:52:27,441 INFO L226 Difference]: Without dead ends: 802 [2021-06-05 05:52:27,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:52:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-06-05 05:52:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 460. [2021-06-05 05:52:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.252723311546841) internal successors, (1493), 459 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1493 transitions. [2021-06-05 05:52:27,452 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1493 transitions. Word has length 25 [2021-06-05 05:52:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:27,453 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1493 transitions. [2021-06-05 05:52:27,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1493 transitions. [2021-06-05 05:52:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:52:27,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:27,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:27,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:52:27,669 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash 895801792, now seen corresponding path program 6 times [2021-06-05 05:52:27,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:27,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849170253] [2021-06-05 05:52:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:27,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:27,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849170253] [2021-06-05 05:52:27,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849170253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:27,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346688369] [2021-06-05 05:52:27,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:27,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:52:27,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:27,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:52:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:27,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346688369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:27,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:27,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:52:27,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888233819] [2021-06-05 05:52:27,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:52:27,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:27,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:52:27,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:52:27,804 INFO L87 Difference]: Start difference. First operand 460 states and 1493 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:28,455 INFO L93 Difference]: Finished difference Result 1766 states and 5540 transitions. [2021-06-05 05:52:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:52:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:52:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:28,462 INFO L225 Difference]: With dead ends: 1766 [2021-06-05 05:52:28,462 INFO L226 Difference]: Without dead ends: 1766 [2021-06-05 05:52:28,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 380.7ms TimeCoverageRelationStatistics Valid=463, Invalid=1793, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:52:28,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-06-05 05:52:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 908. [2021-06-05 05:52:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.404630650496141) internal successors, (3088), 907 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 3088 transitions. [2021-06-05 05:52:28,489 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 3088 transitions. Word has length 25 [2021-06-05 05:52:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:28,489 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 3088 transitions. [2021-06-05 05:52:28,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 3088 transitions. [2021-06-05 05:52:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:52:28,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:28,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:28,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 05:52:28,705 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash -299972656, now seen corresponding path program 7 times [2021-06-05 05:52:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:28,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37026476] [2021-06-05 05:52:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:28,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:28,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37026476] [2021-06-05 05:52:28,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37026476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:28,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755879837] [2021-06-05 05:52:28,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:52:28,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:28,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755879837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:28,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:28,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:52:28,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536556602] [2021-06-05 05:52:28,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:52:28,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:28,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:52:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:52:28,840 INFO L87 Difference]: Start difference. First operand 908 states and 3088 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:28,906 INFO L93 Difference]: Finished difference Result 1372 states and 4480 transitions. [2021-06-05 05:52:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:52:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:52:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:28,912 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 05:52:28,912 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 05:52:28,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:52:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 05:52:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 907. [2021-06-05 05:52:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 3.3863134657836644) internal successors, (3068), 906 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3068 transitions. [2021-06-05 05:52:28,936 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3068 transitions. Word has length 25 [2021-06-05 05:52:28,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:28,936 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3068 transitions. [2021-06-05 05:52:28,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3068 transitions. [2021-06-05 05:52:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:52:28,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:28,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:29,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:29,153 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1819069974, now seen corresponding path program 8 times [2021-06-05 05:52:29,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:29,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109178696] [2021-06-05 05:52:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:29,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:29,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109178696] [2021-06-05 05:52:29,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109178696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:29,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124995225] [2021-06-05 05:52:29,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:29,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:29,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:52:29,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:29,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124995225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:29,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:29,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 05:52:29,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796657871] [2021-06-05 05:52:29,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:52:29,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:29,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:52:29,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:52:29,267 INFO L87 Difference]: Start difference. First operand 907 states and 3068 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:29,673 INFO L93 Difference]: Finished difference Result 2708 states and 9315 transitions. [2021-06-05 05:52:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:52:29,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:52:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:29,684 INFO L225 Difference]: With dead ends: 2708 [2021-06-05 05:52:29,684 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 05:52:29,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:52:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 05:52:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 1405. [2021-06-05 05:52:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.6039886039886038) internal successors, (5060), 1404 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5060 transitions. [2021-06-05 05:52:29,721 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5060 transitions. Word has length 25 [2021-06-05 05:52:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:29,721 INFO L482 AbstractCegarLoop]: Abstraction has 1405 states and 5060 transitions. [2021-06-05 05:52:29,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5060 transitions. [2021-06-05 05:52:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:52:29,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:29,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:29,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:29,937 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1863515072, now seen corresponding path program 9 times [2021-06-05 05:52:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:29,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215097563] [2021-06-05 05:52:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:29,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:29,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215097563] [2021-06-05 05:52:29,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215097563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:29,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984159797] [2021-06-05 05:52:29,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:29,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:52:29,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:29,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:52:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:30,043 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 05:52:30,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984159797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:30,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:30,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 05:52:30,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963155812] [2021-06-05 05:52:30,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:52:30,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:30,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:52:30,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:52:30,045 INFO L87 Difference]: Start difference. First operand 1405 states and 5060 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:30,370 INFO L93 Difference]: Finished difference Result 3015 states and 10002 transitions. [2021-06-05 05:52:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:52:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:52:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:30,380 INFO L225 Difference]: With dead ends: 3015 [2021-06-05 05:52:30,380 INFO L226 Difference]: Without dead ends: 2566 [2021-06-05 05:52:30,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:52:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2021-06-05 05:52:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1717. [2021-06-05 05:52:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.518065268065268) internal successors, (6037), 1716 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6037 transitions. [2021-06-05 05:52:30,418 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6037 transitions. Word has length 26 [2021-06-05 05:52:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:30,419 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 6037 transitions. [2021-06-05 05:52:30,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6037 transitions. [2021-06-05 05:52:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:52:30,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:30,442 INFO L521 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] [2021-06-05 05:52:30,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:52:30,643 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:30,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1408858976, now seen corresponding path program 10 times [2021-06-05 05:52:30,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:30,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966262630] [2021-06-05 05:52:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:30,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:30,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966262630] [2021-06-05 05:52:30,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966262630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:30,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684597537] [2021-06-05 05:52:30,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:30,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:30,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:30,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:52:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:30,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684597537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:30,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:30,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:52:30,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641841577] [2021-06-05 05:52:30,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:52:30,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:30,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:52:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:52:30,719 INFO L87 Difference]: Start difference. First operand 1717 states and 6037 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:30,788 INFO L93 Difference]: Finished difference Result 3213 states and 10872 transitions. [2021-06-05 05:52:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:52:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:52:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:30,800 INFO L225 Difference]: With dead ends: 3213 [2021-06-05 05:52:30,800 INFO L226 Difference]: Without dead ends: 3203 [2021-06-05 05:52:30,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:52:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-06-05 05:52:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2341. [2021-06-05 05:52:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 3.5534188034188032) internal successors, (8315), 2340 states have internal predecessors, (8315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 8315 transitions. [2021-06-05 05:52:30,848 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 8315 transitions. Word has length 28 [2021-06-05 05:52:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:30,849 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 8315 transitions. [2021-06-05 05:52:30,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 8315 transitions. [2021-06-05 05:52:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:52:30,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:30,853 INFO L521 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] [2021-06-05 05:52:31,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:52:31,069 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1644408306, now seen corresponding path program 11 times [2021-06-05 05:52:31,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:31,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299461505] [2021-06-05 05:52:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:31,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:31,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299461505] [2021-06-05 05:52:31,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299461505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:31,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88670574] [2021-06-05 05:52:31,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:31,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:31,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:31,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:52:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:31,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88670574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:31,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:31,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 05:52:31,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334880382] [2021-06-05 05:52:31,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:52:31,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:52:31,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:52:31,182 INFO L87 Difference]: Start difference. First operand 2341 states and 8315 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 05:52:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:31,682 INFO L93 Difference]: Finished difference Result 6700 states and 22333 transitions. [2021-06-05 05:52:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:52:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:52:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:31,697 INFO L225 Difference]: With dead ends: 6700 [2021-06-05 05:52:31,698 INFO L226 Difference]: Without dead ends: 6522 [2021-06-05 05:52:31,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:52:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-06-05 05:52:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 3855. [2021-06-05 05:52:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3854 states have (on average 3.700311364815776) internal successors, (14261), 3854 states have internal predecessors, (14261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 14261 transitions. [2021-06-05 05:52:31,822 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 14261 transitions. Word has length 28 [2021-06-05 05:52:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:31,823 INFO L482 AbstractCegarLoop]: Abstraction has 3855 states and 14261 transitions. [2021-06-05 05:52:31,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 05:52:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 14261 transitions. [2021-06-05 05:52:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:52:31,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:31,830 INFO L521 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] [2021-06-05 05:52:32,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:52:32,037 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1106764104, now seen corresponding path program 12 times [2021-06-05 05:52:32,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:32,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76507841] [2021-06-05 05:52:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:32,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:32,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76507841] [2021-06-05 05:52:32,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76507841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:32,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3916248] [2021-06-05 05:52:32,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:32,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:52:32,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:52:32,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:32,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3916248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:32,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:32,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:52:32,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705650159] [2021-06-05 05:52:32,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:52:32,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:52:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:52:32,150 INFO L87 Difference]: Start difference. First operand 3855 states and 14261 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:32,239 INFO L93 Difference]: Finished difference Result 5643 states and 19918 transitions. [2021-06-05 05:52:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:52:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:52:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:32,252 INFO L225 Difference]: With dead ends: 5643 [2021-06-05 05:52:32,252 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 05:52:32,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:52:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 05:52:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4737. [2021-06-05 05:52:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4737 states, 4736 states have (on average 3.6630067567567566) internal successors, (17348), 4736 states have internal predecessors, (17348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4737 states to 4737 states and 17348 transitions. [2021-06-05 05:52:32,360 INFO L78 Accepts]: Start accepts. Automaton has 4737 states and 17348 transitions. Word has length 28 [2021-06-05 05:52:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:32,360 INFO L482 AbstractCegarLoop]: Abstraction has 4737 states and 17348 transitions. [2021-06-05 05:52:32,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4737 states and 17348 transitions. [2021-06-05 05:52:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 05:52:32,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:32,369 INFO L521 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] [2021-06-05 05:52:32,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:32,584 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:32,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1836774554, now seen corresponding path program 13 times [2021-06-05 05:52:32,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:32,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721448295] [2021-06-05 05:52:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:52:32,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:32,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721448295] [2021-06-05 05:52:32,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721448295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:32,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039402545] [2021-06-05 05:52:32,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:52:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:52:32,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039402545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:32,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:32,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:52:32,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958981178] [2021-06-05 05:52:32,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:52:32,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:32,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:52:32,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:52:32,674 INFO L87 Difference]: Start difference. First operand 4737 states and 17348 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:32,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:32,754 INFO L93 Difference]: Finished difference Result 5055 states and 18166 transitions. [2021-06-05 05:52:32,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:52:32,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 05:52:32,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:32,766 INFO L225 Difference]: With dead ends: 5055 [2021-06-05 05:52:32,766 INFO L226 Difference]: Without dead ends: 5011 [2021-06-05 05:52:32,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:52:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-05 05:52:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4680. [2021-06-05 05:52:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4680 states, 4679 states have (on average 3.663175892284676) internal successors, (17140), 4679 states have internal predecessors, (17140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4680 states to 4680 states and 17140 transitions. [2021-06-05 05:52:32,892 INFO L78 Accepts]: Start accepts. Automaton has 4680 states and 17140 transitions. Word has length 28 [2021-06-05 05:52:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:32,893 INFO L482 AbstractCegarLoop]: Abstraction has 4680 states and 17140 transitions. [2021-06-05 05:52:32,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4680 states and 17140 transitions. [2021-06-05 05:52:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:32,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:32,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:33,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:52:33,116 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1601596804, now seen corresponding path program 14 times [2021-06-05 05:52:33,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:33,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129073805] [2021-06-05 05:52:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:33,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:33,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129073805] [2021-06-05 05:52:33,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129073805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:33,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984924699] [2021-06-05 05:52:33,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:33,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:33,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:33,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:33,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:33,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 05:52:33,568 INFO L446 ElimStorePlain]: Different costs {0=[A], 2=[v_C_19]} [2021-06-05 05:52:33,571 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 29 treesize of output 21 [2021-06-05 05:52:33,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:33,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:33,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 05:52:33,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:33,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:30 [2021-06-05 05:52:33,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:52:33,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:33,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 05:52:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:33,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984924699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:33,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:33,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 05:52:33,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457805858] [2021-06-05 05:52:33,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:52:33,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:33,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:52:33,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:52:33,651 INFO L87 Difference]: Start difference. First operand 4680 states and 17140 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 05:52:34,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:34,284 INFO L93 Difference]: Finished difference Result 7408 states and 26889 transitions. [2021-06-05 05:52:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:52:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 30 [2021-06-05 05:52:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:34,298 INFO L225 Difference]: With dead ends: 7408 [2021-06-05 05:52:34,298 INFO L226 Difference]: Without dead ends: 7387 [2021-06-05 05:52:34,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:52:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7387 states. [2021-06-05 05:52:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7387 to 4727. [2021-06-05 05:52:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4727 states, 4726 states have (on average 3.654253068133728) internal successors, (17270), 4726 states have internal predecessors, (17270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4727 states to 4727 states and 17270 transitions. [2021-06-05 05:52:34,383 INFO L78 Accepts]: Start accepts. Automaton has 4727 states and 17270 transitions. Word has length 30 [2021-06-05 05:52:34,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:34,383 INFO L482 AbstractCegarLoop]: Abstraction has 4727 states and 17270 transitions. [2021-06-05 05:52:34,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 05:52:34,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4727 states and 17270 transitions. [2021-06-05 05:52:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:34,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:34,391 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:34,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:34,605 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 11304900, now seen corresponding path program 15 times [2021-06-05 05:52:34,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:34,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916773452] [2021-06-05 05:52:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:34,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:34,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916773452] [2021-06-05 05:52:34,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916773452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:34,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000278810] [2021-06-05 05:52:34,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:52:34,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:52:34,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:34,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:52:34,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:35,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:35,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:35,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:35,102 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 05:52:35,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-06-05 05:52:35,194 INFO L446 ElimStorePlain]: Different costs {1=[v_C_21], 6=[A]} [2021-06-05 05:52:35,204 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 05:52:35,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 05:52:35,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:35,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:35,240 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 05:52:35,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 05:52:35,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:35,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:35,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 05:52:35,310 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:51, output treesize:145 [2021-06-05 05:52:35,587 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1], 2=[C]} [2021-06-05 05:52:35,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 05:52:35,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:35,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:35,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:35,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:35,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:52:35,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:35,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:35,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:52:35,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:61, output treesize:34 [2021-06-05 05:52:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:35,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000278810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:35,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:35,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:52:35,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403137663] [2021-06-05 05:52:35,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:52:35,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:52:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:52:35,756 INFO L87 Difference]: Start difference. First operand 4727 states and 17270 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 05:52:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:37,151 INFO L93 Difference]: Finished difference Result 7366 states and 26715 transitions. [2021-06-05 05:52:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:52:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 30 [2021-06-05 05:52:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:37,165 INFO L225 Difference]: With dead ends: 7366 [2021-06-05 05:52:37,165 INFO L226 Difference]: Without dead ends: 7312 [2021-06-05 05:52:37,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1285.0ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:52:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-06-05 05:52:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 4804. [2021-06-05 05:52:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4804 states, 4803 states have (on average 3.6420986883198) internal successors, (17493), 4803 states have internal predecessors, (17493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4804 states to 4804 states and 17493 transitions. [2021-06-05 05:52:37,252 INFO L78 Accepts]: Start accepts. Automaton has 4804 states and 17493 transitions. Word has length 30 [2021-06-05 05:52:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:37,252 INFO L482 AbstractCegarLoop]: Abstraction has 4804 states and 17493 transitions. [2021-06-05 05:52:37,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 05:52:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4804 states and 17493 transitions. [2021-06-05 05:52:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:37,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:37,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:37,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:37,478 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash -710829310, now seen corresponding path program 16 times [2021-06-05 05:52:37,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:37,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70831150] [2021-06-05 05:52:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:37,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:37,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70831150] [2021-06-05 05:52:37,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70831150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:37,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407104626] [2021-06-05 05:52:37,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:37,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:37,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:37,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:37,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:37,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 05:52:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:37,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 05:52:37,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:37,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:37,940 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 48 treesize of output 30 [2021-06-05 05:52:37,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:37,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,952 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:46 [2021-06-05 05:52:37,982 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 05:52:37,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:37,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:52:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:38,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407104626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:38,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:38,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:52:38,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654381228] [2021-06-05 05:52:38,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:52:38,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:52:38,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:52:38,019 INFO L87 Difference]: Start difference. First operand 4804 states and 17493 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:38,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:38,592 INFO L93 Difference]: Finished difference Result 8065 states and 28901 transitions. [2021-06-05 05:52:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:52:38,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 05:52:38,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:38,606 INFO L225 Difference]: With dead ends: 8065 [2021-06-05 05:52:38,606 INFO L226 Difference]: Without dead ends: 8023 [2021-06-05 05:52:38,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:52:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2021-06-05 05:52:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 4850. [2021-06-05 05:52:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4850 states, 4849 states have (on average 3.6417818106826148) internal successors, (17659), 4849 states have internal predecessors, (17659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 17659 transitions. [2021-06-05 05:52:38,695 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 17659 transitions. Word has length 30 [2021-06-05 05:52:38,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:38,696 INFO L482 AbstractCegarLoop]: Abstraction has 4850 states and 17659 transitions. [2021-06-05 05:52:38,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 17659 transitions. [2021-06-05 05:52:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:38,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:38,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:38,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 05:52:38,921 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2079167272, now seen corresponding path program 17 times [2021-06-05 05:52:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:38,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371191533] [2021-06-05 05:52:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:39,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:39,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371191533] [2021-06-05 05:52:39,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371191533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:39,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215640719] [2021-06-05 05:52:39,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:39,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:52:39,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:52:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:39,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:39,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:39,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:39,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:39,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 05:52:39,352 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 29 treesize of output 21 [2021-06-05 05:52:39,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:39,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:39,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-06-05 05:52:39,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:39,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:39,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:39,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-06-05 05:52:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:39,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:39,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:39,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 05:52:39,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:52:39,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:39,487 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 05:52:39,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-06-05 05:52:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:39,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215640719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:39,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:39,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 05:52:39,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852842618] [2021-06-05 05:52:39,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:52:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:52:39,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:52:39,562 INFO L87 Difference]: Start difference. First operand 4850 states and 17659 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:40,686 INFO L93 Difference]: Finished difference Result 8106 states and 29154 transitions. [2021-06-05 05:52:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:52:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:52:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:40,701 INFO L225 Difference]: With dead ends: 8106 [2021-06-05 05:52:40,701 INFO L226 Difference]: Without dead ends: 8079 [2021-06-05 05:52:40,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 995.3ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:52:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-06-05 05:52:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 4912. [2021-06-05 05:52:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 4911 states have (on average 3.6424353492160457) internal successors, (17888), 4911 states have internal predecessors, (17888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 17888 transitions. [2021-06-05 05:52:40,789 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 17888 transitions. Word has length 30 [2021-06-05 05:52:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:40,790 INFO L482 AbstractCegarLoop]: Abstraction has 4912 states and 17888 transitions. [2021-06-05 05:52:40,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 17888 transitions. [2021-06-05 05:52:40,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:40,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:40,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:41,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:41,017 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1068514906, now seen corresponding path program 18 times [2021-06-05 05:52:41,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:41,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396546138] [2021-06-05 05:52:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:41,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:41,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396546138] [2021-06-05 05:52:41,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396546138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:41,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146550567] [2021-06-05 05:52:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:52:41,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:52:41,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:41,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:41,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:41,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:52:41,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:41,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 05:52:41,482 INFO L446 ElimStorePlain]: Different costs {0=[v_C_27], 2=[A]} [2021-06-05 05:52:41,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:52:41,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:41,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:41,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:41,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 33 [2021-06-05 05:52:41,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:41,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,512 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:60, output treesize:37 [2021-06-05 05:52:41,540 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 05:52:41,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:41,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:52:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:41,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146550567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:41,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:41,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:52:41,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436751510] [2021-06-05 05:52:41,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:52:41,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:52:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:52:41,578 INFO L87 Difference]: Start difference. First operand 4912 states and 17888 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:42,474 INFO L93 Difference]: Finished difference Result 8129 states and 29154 transitions. [2021-06-05 05:52:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:52:42,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 05:52:42,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:42,489 INFO L225 Difference]: With dead ends: 8129 [2021-06-05 05:52:42,489 INFO L226 Difference]: Without dead ends: 8071 [2021-06-05 05:52:42,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 712.4ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:52:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2021-06-05 05:52:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 4920. [2021-06-05 05:52:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 3.6413905265297823) internal successors, (17912), 4919 states have internal predecessors, (17912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:42,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 17912 transitions. [2021-06-05 05:52:42,609 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 17912 transitions. Word has length 30 [2021-06-05 05:52:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:42,609 INFO L482 AbstractCegarLoop]: Abstraction has 4920 states and 17912 transitions. [2021-06-05 05:52:42,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 17912 transitions. [2021-06-05 05:52:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:42,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:42,617 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:42,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:52:42,833 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:42,834 INFO L82 PathProgramCache]: Analyzing trace with hash 518844538, now seen corresponding path program 19 times [2021-06-05 05:52:42,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:42,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446784310] [2021-06-05 05:52:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:43,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:43,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446784310] [2021-06-05 05:52:43,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446784310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:43,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696690244] [2021-06-05 05:52:43,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:43,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:43,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:43,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:52:43,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:43,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 05:52:43,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:52:43,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:43,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:45 [2021-06-05 05:52:43,212 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 28 treesize of output 20 [2021-06-05 05:52:43,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:43,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:34 [2021-06-05 05:52:43,286 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 05:52:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 05:52:43,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:43,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:43,293 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 05:52:43,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:15 [2021-06-05 05:52:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:43,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696690244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:43,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:43,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:52:43,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311225467] [2021-06-05 05:52:43,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:52:43,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:52:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:52:43,330 INFO L87 Difference]: Start difference. First operand 4920 states and 17912 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:43,737 INFO L93 Difference]: Finished difference Result 7550 states and 27431 transitions. [2021-06-05 05:52:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:52:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 05:52:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:43,750 INFO L225 Difference]: With dead ends: 7550 [2021-06-05 05:52:43,750 INFO L226 Difference]: Without dead ends: 7529 [2021-06-05 05:52:43,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 371.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:52:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7529 states. [2021-06-05 05:52:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7529 to 4944. [2021-06-05 05:52:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4943 states have (on average 3.639490188144851) internal successors, (17990), 4943 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 17990 transitions. [2021-06-05 05:52:43,859 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 17990 transitions. Word has length 30 [2021-06-05 05:52:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:43,859 INFO L482 AbstractCegarLoop]: Abstraction has 4944 states and 17990 transitions. [2021-06-05 05:52:43,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 17990 transitions. [2021-06-05 05:52:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:43,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:43,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:44,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:52:44,084 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:44,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1253982764, now seen corresponding path program 20 times [2021-06-05 05:52:44,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:44,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290569703] [2021-06-05 05:52:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:44,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290569703] [2021-06-05 05:52:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290569703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:44,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288767091] [2021-06-05 05:52:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:44,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:44,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:44,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:52:44,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:44,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:44,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:44,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 05:52:44,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:44,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 05:52:44,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:44,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:44,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:44,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:58 [2021-06-05 05:52:44,458 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 29 treesize of output 23 [2021-06-05 05:52:44,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:44,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:44,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:44,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:34 [2021-06-05 05:52:44,504 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 05:52:44,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 05:52:44,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:44,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:44,513 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 05:52:44,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 05:52:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:44,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288767091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:44,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:44,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:52:44,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118625929] [2021-06-05 05:52:44,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:52:44,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:44,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:52:44,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:52:44,569 INFO L87 Difference]: Start difference. First operand 4944 states and 17990 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:45,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:45,512 INFO L93 Difference]: Finished difference Result 9089 states and 32823 transitions. [2021-06-05 05:52:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:52:45,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 05:52:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:45,528 INFO L225 Difference]: With dead ends: 9089 [2021-06-05 05:52:45,528 INFO L226 Difference]: Without dead ends: 9068 [2021-06-05 05:52:45,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:52:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9068 states. [2021-06-05 05:52:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9068 to 4947. [2021-06-05 05:52:45,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4947 states, 4946 states have (on average 3.6403154063890013) internal successors, (18005), 4946 states have internal predecessors, (18005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4947 states to 4947 states and 18005 transitions. [2021-06-05 05:52:45,629 INFO L78 Accepts]: Start accepts. Automaton has 4947 states and 18005 transitions. Word has length 30 [2021-06-05 05:52:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:45,630 INFO L482 AbstractCegarLoop]: Abstraction has 4947 states and 18005 transitions. [2021-06-05 05:52:45,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4947 states and 18005 transitions. [2021-06-05 05:52:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:45,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:45,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:45,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:45,844 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash -901607074, now seen corresponding path program 21 times [2021-06-05 05:52:45,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:45,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024676646] [2021-06-05 05:52:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:46,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:46,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024676646] [2021-06-05 05:52:46,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024676646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:46,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139898957] [2021-06-05 05:52:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:46,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:52:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:46,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:52:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:46,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:46,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:46,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 05:52:46,191 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 05:52:46,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 05:52:46,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:46,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:58 [2021-06-05 05:52:46,274 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 05:52:46,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 45 [2021-06-05 05:52:46,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:46,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:94 [2021-06-05 05:52:46,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:46,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 56 [2021-06-05 05:52:46,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:52:46,437 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 05:52:46,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 10 [2021-06-05 05:52:46,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:46,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-06-05 05:52:46,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 05:52:46,562 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-05 05:52:46,563 INFO L628 ElimStorePlain]: treesize reduction 119, result has 55.1 percent of original size [2021-06-05 05:52:46,583 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 05:52:46,583 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:128, output treesize:239 [2021-06-05 05:52:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:46,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139898957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:46,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:46,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-06-05 05:52:46,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650432706] [2021-06-05 05:52:46,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:52:46,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:52:46,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:52:46,876 INFO L87 Difference]: Start difference. First operand 4947 states and 18005 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 05:52:48,923 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 05:52:49,432 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-06-05 05:52:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:49,861 INFO L93 Difference]: Finished difference Result 8657 states and 30784 transitions. [2021-06-05 05:52:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:52:49,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 30 [2021-06-05 05:52:49,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:49,875 INFO L225 Difference]: With dead ends: 8657 [2021-06-05 05:52:49,875 INFO L226 Difference]: Without dead ends: 8556 [2021-06-05 05:52:49,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2724.0ms TimeCoverageRelationStatistics Valid=426, Invalid=2330, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:52:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-06-05 05:52:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 4982. [2021-06-05 05:52:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4982 states, 4981 states have (on average 3.6402328849628587) internal successors, (18132), 4981 states have internal predecessors, (18132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4982 states to 4982 states and 18132 transitions. [2021-06-05 05:52:49,956 INFO L78 Accepts]: Start accepts. Automaton has 4982 states and 18132 transitions. Word has length 30 [2021-06-05 05:52:49,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:49,956 INFO L482 AbstractCegarLoop]: Abstraction has 4982 states and 18132 transitions. [2021-06-05 05:52:49,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 05:52:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4982 states and 18132 transitions. [2021-06-05 05:52:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:49,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:49,964 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:50,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 05:52:50,164 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:50,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1440214972, now seen corresponding path program 22 times [2021-06-05 05:52:50,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:50,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25347228] [2021-06-05 05:52:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:50,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:50,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25347228] [2021-06-05 05:52:50,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25347228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:50,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45113199] [2021-06-05 05:52:50,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:50,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:50,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:50,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:52:50,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:50,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:50,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:50,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 05:52:50,673 INFO L446 ElimStorePlain]: Different costs {1=[v_C_35], 3=[A]} [2021-06-05 05:52:50,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:50,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 05:52:50,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:50,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:50,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:50,697 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 05:52:50,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 29 [2021-06-05 05:52:50,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:50,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:50,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:50,707 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:70, output treesize:45 [2021-06-05 05:52:50,738 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 9 treesize of output 5 [2021-06-05 05:52:50,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:50,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:50,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:50,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:15 [2021-06-05 05:52:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:50,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45113199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:50,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:50,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:52:50,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201576850] [2021-06-05 05:52:50,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:52:50,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:52:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:52:50,772 INFO L87 Difference]: Start difference. First operand 4982 states and 18132 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:51,226 INFO L93 Difference]: Finished difference Result 8142 states and 29267 transitions. [2021-06-05 05:52:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:52:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 05:52:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:51,240 INFO L225 Difference]: With dead ends: 8142 [2021-06-05 05:52:51,240 INFO L226 Difference]: Without dead ends: 8100 [2021-06-05 05:52:51,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 379.4ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:52:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2021-06-05 05:52:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 5028. [2021-06-05 05:52:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 3.6399443007758108) internal successors, (18298), 5027 states have internal predecessors, (18298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 18298 transitions. [2021-06-05 05:52:51,322 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 18298 transitions. Word has length 30 [2021-06-05 05:52:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:51,322 INFO L482 AbstractCegarLoop]: Abstraction has 5028 states and 18298 transitions. [2021-06-05 05:52:51,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 18298 transitions. [2021-06-05 05:52:51,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:51,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:51,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:51,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:51,530 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1486414362, now seen corresponding path program 23 times [2021-06-05 05:52:51,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:51,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551257134] [2021-06-05 05:52:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:51,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:51,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551257134] [2021-06-05 05:52:51,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551257134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:51,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997715159] [2021-06-05 05:52:51,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:52:51,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:52:51,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:52:51,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:51,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:51,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:51,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:51,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:51,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 05:52:51,988 INFO L446 ElimStorePlain]: Different costs {1=[v_C_37], 3=[A]} [2021-06-05 05:52:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:51,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:52:51,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:52,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:52,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:52,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 33 [2021-06-05 05:52:52,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:52,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:52,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:52,027 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:62 [2021-06-05 05:52:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:52,169 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 40 treesize of output 22 [2021-06-05 05:52:52,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:52,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:52,179 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 05:52:52,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:33 [2021-06-05 05:52:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:52,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997715159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:52,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:52,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 05:52:52,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306469478] [2021-06-05 05:52:52,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:52:52,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:52:52,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:52:52,252 INFO L87 Difference]: Start difference. First operand 5028 states and 18298 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 05:52:53,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:53,134 INFO L93 Difference]: Finished difference Result 7991 states and 28855 transitions. [2021-06-05 05:52:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:52:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 30 [2021-06-05 05:52:53,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:53,148 INFO L225 Difference]: With dead ends: 7991 [2021-06-05 05:52:53,148 INFO L226 Difference]: Without dead ends: 7952 [2021-06-05 05:52:53,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 759.3ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:52:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7952 states. [2021-06-05 05:52:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7952 to 5159. [2021-06-05 05:52:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 3.630864676231097) internal successors, (18728), 5158 states have internal predecessors, (18728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 18728 transitions. [2021-06-05 05:52:53,233 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 18728 transitions. Word has length 30 [2021-06-05 05:52:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:53,233 INFO L482 AbstractCegarLoop]: Abstraction has 5159 states and 18728 transitions. [2021-06-05 05:52:53,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 05:52:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 18728 transitions. [2021-06-05 05:52:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:53,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:53,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:53,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 05:52:53,441 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash 911205050, now seen corresponding path program 24 times [2021-06-05 05:52:53,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:53,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028185239] [2021-06-05 05:52:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:53,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:53,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028185239] [2021-06-05 05:52:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028185239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:53,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998953243] [2021-06-05 05:52:53,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:53,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:52:53,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:53,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:53,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:52:53,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:53,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:53,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:53,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 05:52:53,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:53,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:52:53,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:53,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:53,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:53,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 05:52:53,826 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 28 treesize of output 20 [2021-06-05 05:52:53,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:53,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:53,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:53,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:31 [2021-06-05 05:52:53,875 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 05:52:53,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 05:52:53,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:53,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:53,882 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 05:52:53,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:17 [2021-06-05 05:52:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:53,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998953243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:53,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:53,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:52:53,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116492474] [2021-06-05 05:52:53,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:52:53,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:53,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:52:53,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:52:53,948 INFO L87 Difference]: Start difference. First operand 5159 states and 18728 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:54,987 INFO L93 Difference]: Finished difference Result 8555 states and 30791 transitions. [2021-06-05 05:52:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:52:54,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 05:52:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:55,001 INFO L225 Difference]: With dead ends: 8555 [2021-06-05 05:52:55,002 INFO L226 Difference]: Without dead ends: 8516 [2021-06-05 05:52:55,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:52:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8516 states. [2021-06-05 05:52:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8516 to 5256. [2021-06-05 05:52:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 5255 states have (on average 3.625880114176974) internal successors, (19054), 5255 states have internal predecessors, (19054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 19054 transitions. [2021-06-05 05:52:55,086 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 19054 transitions. Word has length 30 [2021-06-05 05:52:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:55,086 INFO L482 AbstractCegarLoop]: Abstraction has 5256 states and 19054 transitions. [2021-06-05 05:52:55,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 19054 transitions. [2021-06-05 05:52:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:55,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:55,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:55,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:55,293 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash -509246562, now seen corresponding path program 25 times [2021-06-05 05:52:55,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:55,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175738240] [2021-06-05 05:52:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:55,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:55,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175738240] [2021-06-05 05:52:55,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175738240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:55,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792867809] [2021-06-05 05:52:55,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:55,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:55,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:52:55,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:55,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:55,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:55,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 05:52:55,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:55,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:52:55,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:55,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:55,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:55,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 05:52:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:55,678 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 05:52:55,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 33 [2021-06-05 05:52:55,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:55,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:55,689 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 05:52:55,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:52 [2021-06-05 05:52:55,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-06-05 05:52:55,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:55,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:55,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:55,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 05:52:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:55,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792867809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:55,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:55,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:52:55,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632962689] [2021-06-05 05:52:55,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:52:55,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:52:55,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:52:55,772 INFO L87 Difference]: Start difference. First operand 5256 states and 19054 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:56,287 INFO L93 Difference]: Finished difference Result 8433 states and 30286 transitions. [2021-06-05 05:52:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:52:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 05:52:56,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:56,303 INFO L225 Difference]: With dead ends: 8433 [2021-06-05 05:52:56,303 INFO L226 Difference]: Without dead ends: 8359 [2021-06-05 05:52:56,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 379.4ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:52:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8359 states. [2021-06-05 05:52:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8359 to 5263. [2021-06-05 05:52:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 3.6244773850247056) internal successors, (19072), 5262 states have internal predecessors, (19072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 19072 transitions. [2021-06-05 05:52:56,389 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 19072 transitions. Word has length 30 [2021-06-05 05:52:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:56,389 INFO L482 AbstractCegarLoop]: Abstraction has 5263 states and 19072 transitions. [2021-06-05 05:52:56,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 19072 transitions. [2021-06-05 05:52:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:56,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:56,397 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:56,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 05:52:56,598 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1576620264, now seen corresponding path program 26 times [2021-06-05 05:52:56,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:56,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138722033] [2021-06-05 05:52:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:56,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:56,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138722033] [2021-06-05 05:52:56,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138722033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:56,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617481292] [2021-06-05 05:52:56,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:52:56,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:56,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:56,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:56,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:52:56,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:56,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 05:52:56,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:56,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:52:56,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:56,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-06-05 05:52:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:56,997 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 05:52:56,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 05:52:56,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:57,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:57,008 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 05:52:57,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:53 [2021-06-05 05:52:57,054 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 44 treesize of output 28 [2021-06-05 05:52:57,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:57,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:57,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:57,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 05:52:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:57,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617481292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:57,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:57,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:52:57,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505235236] [2021-06-05 05:52:57,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:52:57,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:57,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:52:57,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:52:57,112 INFO L87 Difference]: Start difference. First operand 5263 states and 19072 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:57,601 INFO L93 Difference]: Finished difference Result 8516 states and 30518 transitions. [2021-06-05 05:52:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:52:57,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 30 [2021-06-05 05:52:57,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:57,616 INFO L225 Difference]: With dead ends: 8516 [2021-06-05 05:52:57,616 INFO L226 Difference]: Without dead ends: 8417 [2021-06-05 05:52:57,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:52:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2021-06-05 05:52:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 5307. [2021-06-05 05:52:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5307 states, 5306 states have (on average 3.626460610629476) internal successors, (19242), 5306 states have internal predecessors, (19242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5307 states to 5307 states and 19242 transitions. [2021-06-05 05:52:57,702 INFO L78 Accepts]: Start accepts. Automaton has 5307 states and 19242 transitions. Word has length 30 [2021-06-05 05:52:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:57,703 INFO L482 AbstractCegarLoop]: Abstraction has 5307 states and 19242 transitions. [2021-06-05 05:52:57,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 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 05:52:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 5307 states and 19242 transitions. [2021-06-05 05:52:57,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:57,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:57,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:57,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:57,912 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:57,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1298274782, now seen corresponding path program 27 times [2021-06-05 05:52:57,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:57,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796898399] [2021-06-05 05:52:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:58,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796898399] [2021-06-05 05:52:58,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796898399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939135018] [2021-06-05 05:52:58,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:58,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:52:58,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:52:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:58,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:58,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:58,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:58,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:58,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 05:52:58,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:52:58,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:58,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:58,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:58,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 05:52:58,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:58,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 05:52:58,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:58,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:58,434 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 05:52:58,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:82 [2021-06-05 05:52:58,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:58,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:58,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:52:58,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:58,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:58,555 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 05:52:58,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:52:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:58,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939135018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:58,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:58,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 05:52:58,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881547406] [2021-06-05 05:52:58,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:52:58,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:52:58,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:52:58,612 INFO L87 Difference]: Start difference. First operand 5307 states and 19242 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:59,427 INFO L93 Difference]: Finished difference Result 7935 states and 28752 transitions. [2021-06-05 05:52:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:52:59,427 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:52:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:59,441 INFO L225 Difference]: With dead ends: 7935 [2021-06-05 05:52:59,441 INFO L226 Difference]: Without dead ends: 7914 [2021-06-05 05:52:59,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 728.0ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:52:59,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7914 states. [2021-06-05 05:52:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7914 to 5331. [2021-06-05 05:52:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.625140712945591) internal successors, (19322), 5330 states have internal predecessors, (19322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 19322 transitions. [2021-06-05 05:52:59,518 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 19322 transitions. Word has length 30 [2021-06-05 05:52:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:59,518 INFO L482 AbstractCegarLoop]: Abstraction has 5331 states and 19322 transitions. [2021-06-05 05:52:59,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 19322 transitions. [2021-06-05 05:52:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:52:59,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:59,525 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:59,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:52:59,725 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash -474552520, now seen corresponding path program 28 times [2021-06-05 05:52:59,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:59,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103076482] [2021-06-05 05:52:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:59,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:59,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103076482] [2021-06-05 05:52:59,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103076482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:59,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322587178] [2021-06-05 05:52:59,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:59,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:59,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:52:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:59,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:52:59,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:59,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:59,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:59,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 05:53:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:00,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 05:53:00,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:00,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:56 [2021-06-05 05:53:00,148 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 29 treesize of output 21 [2021-06-05 05:53:00,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:00,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:33 [2021-06-05 05:53:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:00,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:00,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:53:00,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:00,201 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 05:53:00,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:17 [2021-06-05 05:53:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:00,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322587178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:00,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:00,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 05:53:00,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981452561] [2021-06-05 05:53:00,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:53:00,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:53:00,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:53:00,256 INFO L87 Difference]: Start difference. First operand 5331 states and 19322 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:01,162 INFO L93 Difference]: Finished difference Result 9749 states and 35110 transitions. [2021-06-05 05:53:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:53:01,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:01,181 INFO L225 Difference]: With dead ends: 9749 [2021-06-05 05:53:01,181 INFO L226 Difference]: Without dead ends: 9728 [2021-06-05 05:53:01,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 597.8ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:53:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9728 states. [2021-06-05 05:53:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9728 to 5333. [2021-06-05 05:53:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 3.624906226556639) internal successors, (19328), 5332 states have internal predecessors, (19328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 19328 transitions. [2021-06-05 05:53:01,273 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 19328 transitions. Word has length 30 [2021-06-05 05:53:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:01,273 INFO L482 AbstractCegarLoop]: Abstraction has 5333 states and 19328 transitions. [2021-06-05 05:53:01,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 19328 transitions. [2021-06-05 05:53:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:01,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:01,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:01,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:01,481 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:01,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:01,482 INFO L82 PathProgramCache]: Analyzing trace with hash -122176830, now seen corresponding path program 29 times [2021-06-05 05:53:01,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:01,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720237452] [2021-06-05 05:53:01,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:01,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:01,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720237452] [2021-06-05 05:53:01,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720237452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:01,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189942485] [2021-06-05 05:53:01,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:53:01,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:01,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:01,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:53:01,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:01,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:01,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:01,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:01,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:01,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 05:53:01,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:01,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:01,904 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:01,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-06-05 05:53:01,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:01,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:01,918 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 05:53:01,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 05:53:01,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:01,968 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 72 treesize of output 38 [2021-06-05 05:53:01,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:01,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:01,977 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 05:53:01,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:100, output treesize:57 [2021-06-05 05:53:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:02,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:02,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 05:53:02,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:02,089 INFO L628 ElimStorePlain]: treesize reduction 22, result has 62.7 percent of original size [2021-06-05 05:53:02,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:02,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:21 [2021-06-05 05:53:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:02,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189942485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:02,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:02,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 05:53:02,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680832168] [2021-06-05 05:53:02,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:53:02,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:53:02,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:53:02,160 INFO L87 Difference]: Start difference. First operand 5333 states and 19328 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:03,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:03,378 INFO L93 Difference]: Finished difference Result 8721 states and 31251 transitions. [2021-06-05 05:53:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:53:03,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:03,393 INFO L225 Difference]: With dead ends: 8721 [2021-06-05 05:53:03,393 INFO L226 Difference]: Without dead ends: 8684 [2021-06-05 05:53:03,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 924.2ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:53:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-06-05 05:53:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 5338. [2021-06-05 05:53:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.6245081506464305) internal successors, (19344), 5337 states have internal predecessors, (19344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 19344 transitions. [2021-06-05 05:53:03,478 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 19344 transitions. Word has length 30 [2021-06-05 05:53:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:03,478 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 19344 transitions. [2021-06-05 05:53:03,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 19344 transitions. [2021-06-05 05:53:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:03,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:03,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:03,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:03,687 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:03,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1021403778, now seen corresponding path program 30 times [2021-06-05 05:53:03,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:03,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356334963] [2021-06-05 05:53:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:03,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:03,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356334963] [2021-06-05 05:53:03,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356334963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:03,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294203698] [2021-06-05 05:53:03,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:03,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:53:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:53:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:03,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:03,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:03,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:03,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:03,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 05:53:04,059 INFO L446 ElimStorePlain]: Different costs {0=[v_C_51], 2=[A]} [2021-06-05 05:53:04,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:53:04,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:04,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:04,081 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 05:53:04,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 31 [2021-06-05 05:53:04,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:04,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:04,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:04,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:43 [2021-06-05 05:53:04,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:04,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 44 [2021-06-05 05:53:04,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:04,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:04,178 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 05:53:04,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:79 [2021-06-05 05:53:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:04,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294203698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:04,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:04,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:53:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035084406] [2021-06-05 05:53:04,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:53:04,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:53:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:53:04,261 INFO L87 Difference]: Start difference. First operand 5338 states and 19344 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:05,038 INFO L93 Difference]: Finished difference Result 8676 states and 31046 transitions. [2021-06-05 05:53:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:53:05,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:05,052 INFO L225 Difference]: With dead ends: 8676 [2021-06-05 05:53:05,052 INFO L226 Difference]: Without dead ends: 8655 [2021-06-05 05:53:05,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:53:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-06-05 05:53:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 5360. [2021-06-05 05:53:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 3.6215711886546) internal successors, (19408), 5359 states have internal predecessors, (19408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 19408 transitions. [2021-06-05 05:53:05,155 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 19408 transitions. Word has length 30 [2021-06-05 05:53:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:05,156 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 19408 transitions. [2021-06-05 05:53:05,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 19408 transitions. [2021-06-05 05:53:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:05,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:05,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:05,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 05:53:05,377 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:05,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:05,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1905225556, now seen corresponding path program 31 times [2021-06-05 05:53:05,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:05,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67523162] [2021-06-05 05:53:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:05,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67523162] [2021-06-05 05:53:05,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67523162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386940616] [2021-06-05 05:53:05,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:05,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:05,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:05,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:05,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:05,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 05:53:05,908 INFO L446 ElimStorePlain]: Different costs {1=[v_C_53], 3=[A]} [2021-06-05 05:53:05,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:05,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:53:05,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:05,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:05,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:05,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:05,934 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-06-05 05:53:05,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 05:53:05,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:05,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:05,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:05,949 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:52 [2021-06-05 05:53:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:06,024 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 38 treesize of output 20 [2021-06-05 05:53:06,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:06,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:06,031 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 05:53:06,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:14 [2021-06-05 05:53:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:06,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386940616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:06,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:06,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 05:53:06,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672459831] [2021-06-05 05:53:06,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:53:06,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:06,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:53:06,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:53:06,069 INFO L87 Difference]: Start difference. First operand 5360 states and 19408 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:07,295 INFO L93 Difference]: Finished difference Result 8842 states and 31468 transitions. [2021-06-05 05:53:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:53:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:07,310 INFO L225 Difference]: With dead ends: 8842 [2021-06-05 05:53:07,311 INFO L226 Difference]: Without dead ends: 8788 [2021-06-05 05:53:07,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 970.3ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:53:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-06-05 05:53:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 5359. [2021-06-05 05:53:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 3.625793206420306) internal successors, (19427), 5358 states have internal predecessors, (19427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 19427 transitions. [2021-06-05 05:53:07,397 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 19427 transitions. Word has length 30 [2021-06-05 05:53:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:07,397 INFO L482 AbstractCegarLoop]: Abstraction has 5359 states and 19427 transitions. [2021-06-05 05:53:07,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 19427 transitions. [2021-06-05 05:53:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:07,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:07,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:07,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:07,620 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash -280805828, now seen corresponding path program 32 times [2021-06-05 05:53:07,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:07,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142866399] [2021-06-05 05:53:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:07,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:07,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142866399] [2021-06-05 05:53:07,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142866399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:07,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885808348] [2021-06-05 05:53:07,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:07,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:07,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:07,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:07,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:07,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:07,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:07,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:07,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:07,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 05:53:07,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:53:07,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:07,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:07,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:07,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 05:53:08,020 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 28 treesize of output 20 [2021-06-05 05:53:08,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:08,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:08,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:08,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:34 [2021-06-05 05:53:08,066 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 05:53:08,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 05:53:08,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:08,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:08,073 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 05:53:08,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 05:53:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885808348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:08,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:08,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:53:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378315320] [2021-06-05 05:53:08,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:53:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:53:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:53:08,126 INFO L87 Difference]: Start difference. First operand 5359 states and 19427 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:08,930 INFO L93 Difference]: Finished difference Result 9600 states and 34572 transitions. [2021-06-05 05:53:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:53:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:08,947 INFO L225 Difference]: With dead ends: 9600 [2021-06-05 05:53:08,947 INFO L226 Difference]: Without dead ends: 9579 [2021-06-05 05:53:08,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:53:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9579 states. [2021-06-05 05:53:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9579 to 5333. [2021-06-05 05:53:09,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 3.627344336084021) internal successors, (19341), 5332 states have internal predecessors, (19341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 19341 transitions. [2021-06-05 05:53:09,037 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 19341 transitions. Word has length 30 [2021-06-05 05:53:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:09,038 INFO L482 AbstractCegarLoop]: Abstraction has 5333 states and 19341 transitions. [2021-06-05 05:53:09,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 19341 transitions. [2021-06-05 05:53:09,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:09,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:09,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:09,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 05:53:09,245 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:09,245 INFO L82 PathProgramCache]: Analyzing trace with hash -90435368, now seen corresponding path program 33 times [2021-06-05 05:53:09,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:09,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127667238] [2021-06-05 05:53:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:09,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:09,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127667238] [2021-06-05 05:53:09,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127667238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:09,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086039981] [2021-06-05 05:53:09,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:09,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:53:09,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:09,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:53:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:09,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:09,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:09,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:09,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:09,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 05:53:09,552 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 05:53:09,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 05:53:09,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:09,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:09,566 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 05:53:09,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:52 [2021-06-05 05:53:09,689 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 05:53:09,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 36 [2021-06-05 05:53:09,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:09,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:09,713 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 05:53:09,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:66 [2021-06-05 05:53:09,807 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 9 treesize of output 5 [2021-06-05 05:53:09,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:09,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:09,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:09,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 05:53:09,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:09,826 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 9 treesize of output 5 [2021-06-05 05:53:09,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:09,860 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.5 percent of original size [2021-06-05 05:53:09,861 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 05:53:09,861 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:85, output treesize:43 [2021-06-05 05:53:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:09,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086039981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:09,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:09,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 05:53:09,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327757026] [2021-06-05 05:53:09,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:09,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:09,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:09,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:09,991 INFO L87 Difference]: Start difference. First operand 5333 states and 19341 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:12,508 INFO L93 Difference]: Finished difference Result 9517 states and 33779 transitions. [2021-06-05 05:53:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:53:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:12,527 INFO L225 Difference]: With dead ends: 9517 [2021-06-05 05:53:12,528 INFO L226 Difference]: Without dead ends: 9332 [2021-06-05 05:53:12,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1797.9ms TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:53:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2021-06-05 05:53:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 5481. [2021-06-05 05:53:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 3.6350364963503647) internal successors, (19920), 5480 states have internal predecessors, (19920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 19920 transitions. [2021-06-05 05:53:12,659 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 19920 transitions. Word has length 30 [2021-06-05 05:53:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:12,659 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 19920 transitions. [2021-06-05 05:53:12,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 19920 transitions. [2021-06-05 05:53:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:12,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:12,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:12,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:12,870 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1157809070, now seen corresponding path program 34 times [2021-06-05 05:53:12,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:12,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457479675] [2021-06-05 05:53:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:13,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:13,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457479675] [2021-06-05 05:53:13,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457479675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:13,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919140395] [2021-06-05 05:53:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:13,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:13,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:13,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:13,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:13,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:13,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:13,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 05:53:13,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:13,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:53:13,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:13,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:51 [2021-06-05 05:53:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:13,255 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 05:53:13,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 33 [2021-06-05 05:53:13,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:13,265 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 05:53:13,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:48 [2021-06-05 05:53:13,321 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 44 treesize of output 28 [2021-06-05 05:53:13,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:13,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:20 [2021-06-05 05:53:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:13,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919140395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:13,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:13,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:53:13,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311808966] [2021-06-05 05:53:13,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:53:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:53:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:53:13,385 INFO L87 Difference]: Start difference. First operand 5481 states and 19920 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:14,107 INFO L93 Difference]: Finished difference Result 8596 states and 30994 transitions. [2021-06-05 05:53:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:53:14,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:14,124 INFO L225 Difference]: With dead ends: 8596 [2021-06-05 05:53:14,124 INFO L226 Difference]: Without dead ends: 8557 [2021-06-05 05:53:14,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:53:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8557 states. [2021-06-05 05:53:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8557 to 5445. [2021-06-05 05:53:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5445 states, 5444 states have (on average 3.635194709772226) internal successors, (19790), 5444 states have internal predecessors, (19790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5445 states to 5445 states and 19790 transitions. [2021-06-05 05:53:14,211 INFO L78 Accepts]: Start accepts. Automaton has 5445 states and 19790 transitions. Word has length 30 [2021-06-05 05:53:14,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:14,211 INFO L482 AbstractCegarLoop]: Abstraction has 5445 states and 19790 transitions. [2021-06-05 05:53:14,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5445 states and 19790 transitions. [2021-06-05 05:53:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:14,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:14,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:14,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 05:53:14,418 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:14,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1894214378, now seen corresponding path program 35 times [2021-06-05 05:53:14,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:14,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563364479] [2021-06-05 05:53:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:14,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563364479] [2021-06-05 05:53:14,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563364479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:14,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938940224] [2021-06-05 05:53:14,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:53:14,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:53:14,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:14,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:53:14,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:14,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:14,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:14,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:14,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:14,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-06-05 05:53:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:14,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 05:53:14,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:14,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:14,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:14,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 05:53:14,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:14,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:14,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:14,804 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:55, output treesize:30 [2021-06-05 05:53:14,830 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 11 treesize of output 7 [2021-06-05 05:53:14,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:14,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:14,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:14,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-06-05 05:53:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:14,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938940224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:14,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:14,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 05:53:14,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667984886] [2021-06-05 05:53:14,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:53:14,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:53:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:53:14,880 INFO L87 Difference]: Start difference. First operand 5445 states and 19790 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:15,415 INFO L93 Difference]: Finished difference Result 5910 states and 21216 transitions. [2021-06-05 05:53:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:53:15,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:15,425 INFO L225 Difference]: With dead ends: 5910 [2021-06-05 05:53:15,425 INFO L226 Difference]: Without dead ends: 5889 [2021-06-05 05:53:15,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:53:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5889 states. [2021-06-05 05:53:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5889 to 5461. [2021-06-05 05:53:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5461 states, 5460 states have (on average 3.635164835164835) internal successors, (19848), 5460 states have internal predecessors, (19848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5461 states to 5461 states and 19848 transitions. [2021-06-05 05:53:15,512 INFO L78 Accepts]: Start accepts. Automaton has 5461 states and 19848 transitions. Word has length 30 [2021-06-05 05:53:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:15,512 INFO L482 AbstractCegarLoop]: Abstraction has 5461 states and 19848 transitions. [2021-06-05 05:53:15,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5461 states and 19848 transitions. [2021-06-05 05:53:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:15,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:15,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:15,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 05:53:15,720 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1851082550, now seen corresponding path program 36 times [2021-06-05 05:53:15,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:15,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042807208] [2021-06-05 05:53:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:15,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:15,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042807208] [2021-06-05 05:53:15,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042807208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:15,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854481628] [2021-06-05 05:53:15,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:15,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:53:15,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:15,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:15,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:15,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:15,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:15,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:15,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:16,021 INFO L354 Elim1Store]: treesize reduction 64, result has 14.7 percent of original size [2021-06-05 05:53:16,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 81 [2021-06-05 05:53:16,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:16,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:16,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:16,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:50 [2021-06-05 05:53:16,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:16,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 05:53:16,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:16,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:16,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:16,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:31 [2021-06-05 05:53:16,119 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 20 treesize of output 12 [2021-06-05 05:53:16,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:16,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:16,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:16,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:53:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:16,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854481628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:16,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:16,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:53:16,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780808649] [2021-06-05 05:53:16,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:16,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:16,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:16,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:16,179 INFO L87 Difference]: Start difference. First operand 5461 states and 19848 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:16,806 INFO L93 Difference]: Finished difference Result 5947 states and 21347 transitions. [2021-06-05 05:53:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:53:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:16,817 INFO L225 Difference]: With dead ends: 5947 [2021-06-05 05:53:16,817 INFO L226 Difference]: Without dead ends: 5886 [2021-06-05 05:53:16,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:53:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-05 05:53:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 5494. [2021-06-05 05:53:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5493 states have (on average 3.6309848898598216) internal successors, (19945), 5493 states have internal predecessors, (19945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 19945 transitions. [2021-06-05 05:53:16,890 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 19945 transitions. Word has length 30 [2021-06-05 05:53:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:16,890 INFO L482 AbstractCegarLoop]: Abstraction has 5494 states and 19945 transitions. [2021-06-05 05:53:16,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 19945 transitions. [2021-06-05 05:53:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:16,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:16,898 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:17,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:53:17,099 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash 430630938, now seen corresponding path program 37 times [2021-06-05 05:53:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:17,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281599482] [2021-06-05 05:53:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:17,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:17,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281599482] [2021-06-05 05:53:17,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281599482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:17,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280432322] [2021-06-05 05:53:17,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:17,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:17,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:17,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:17,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:17,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:17,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 05:53:17,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:17,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:52 [2021-06-05 05:53:17,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:17,422 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 46 treesize of output 30 [2021-06-05 05:53:17,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:17,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:27 [2021-06-05 05:53:17,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 05:53:17,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:17,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:12 [2021-06-05 05:53:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:17,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280432322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:17,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:17,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:53:17,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559576247] [2021-06-05 05:53:17,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:17,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:17,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:17,505 INFO L87 Difference]: Start difference. First operand 5494 states and 19945 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:18,133 INFO L93 Difference]: Finished difference Result 6183 states and 22092 transitions. [2021-06-05 05:53:18,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:53:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:18,145 INFO L225 Difference]: With dead ends: 6183 [2021-06-05 05:53:18,145 INFO L226 Difference]: Without dead ends: 6156 [2021-06-05 05:53:18,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:53:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6156 states. [2021-06-05 05:53:18,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6156 to 5494. [2021-06-05 05:53:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5494 states, 5493 states have (on average 3.6309848898598216) internal successors, (19945), 5493 states have internal predecessors, (19945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5494 states to 5494 states and 19945 transitions. [2021-06-05 05:53:18,251 INFO L78 Accepts]: Start accepts. Automaton has 5494 states and 19945 transitions. Word has length 30 [2021-06-05 05:53:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:18,252 INFO L482 AbstractCegarLoop]: Abstraction has 5494 states and 19945 transitions. [2021-06-05 05:53:18,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5494 states and 19945 transitions. [2021-06-05 05:53:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:18,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:18,259 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:18,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:53:18,460 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:18,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1729453130, now seen corresponding path program 38 times [2021-06-05 05:53:18,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:18,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30785379] [2021-06-05 05:53:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:18,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:18,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30785379] [2021-06-05 05:53:18,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30785379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:18,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728871092] [2021-06-05 05:53:18,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:18,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:18,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:18,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:18,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:18,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:18,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:18,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:18,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:18,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:18,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:53:18,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:18,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:18,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:18,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:52 [2021-06-05 05:53:18,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:18,788 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 36 treesize of output 26 [2021-06-05 05:53:18,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:18,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:18,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:18,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:30 [2021-06-05 05:53:18,847 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 20 treesize of output 12 [2021-06-05 05:53:18,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:18,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:18,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:18,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:53:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:18,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728871092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:18,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:18,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:53:18,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508238529] [2021-06-05 05:53:18,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:18,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:18,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:18,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:18,900 INFO L87 Difference]: Start difference. First operand 5494 states and 19945 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:19,550 INFO L93 Difference]: Finished difference Result 5936 states and 21233 transitions. [2021-06-05 05:53:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:53:19,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:19,560 INFO L225 Difference]: With dead ends: 5936 [2021-06-05 05:53:19,560 INFO L226 Difference]: Without dead ends: 5909 [2021-06-05 05:53:19,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:53:19,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5909 states. [2021-06-05 05:53:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5909 to 5540. [2021-06-05 05:53:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.6268279472829033) internal successors, (20089), 5539 states have internal predecessors, (20089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20089 transitions. [2021-06-05 05:53:19,626 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20089 transitions. Word has length 30 [2021-06-05 05:53:19,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:19,626 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20089 transitions. [2021-06-05 05:53:19,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20089 transitions. [2021-06-05 05:53:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:19,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:19,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:19,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:19,834 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:19,834 INFO L82 PathProgramCache]: Analyzing trace with hash -983852134, now seen corresponding path program 39 times [2021-06-05 05:53:19,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:19,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061911338] [2021-06-05 05:53:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:19,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:19,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061911338] [2021-06-05 05:53:19,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061911338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:19,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573817464] [2021-06-05 05:53:19,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:19,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:53:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:53:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:20,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:20,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:20,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:20,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:20,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-05 05:53:20,091 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 05:53:20,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-06-05 05:53:20,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:20,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:20,106 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 05:53:20,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:44 [2021-06-05 05:53:20,238 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-05 05:53:20,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 05:53:20,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:20,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:20,275 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 05:53:20,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:117 [2021-06-05 05:53:20,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:20,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:20,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 05:53:20,457 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:53:20,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:20,470 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 05:53:20,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:42 [2021-06-05 05:53:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:20,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573817464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:20,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:20,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-06-05 05:53:20,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498187525] [2021-06-05 05:53:20,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:53:20,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:20,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:53:20,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:53:20,580 INFO L87 Difference]: Start difference. First operand 5540 states and 20089 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:22,507 INFO L93 Difference]: Finished difference Result 6092 states and 21727 transitions. [2021-06-05 05:53:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:53:22,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:22,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:22,517 INFO L225 Difference]: With dead ends: 6092 [2021-06-05 05:53:22,517 INFO L226 Difference]: Without dead ends: 6050 [2021-06-05 05:53:22,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1338.2ms TimeCoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:53:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6050 states. [2021-06-05 05:53:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6050 to 5604. [2021-06-05 05:53:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5603 states have (on average 3.6234160271283242) internal successors, (20302), 5603 states have internal predecessors, (20302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 20302 transitions. [2021-06-05 05:53:22,590 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 20302 transitions. Word has length 30 [2021-06-05 05:53:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:22,590 INFO L482 AbstractCegarLoop]: Abstraction has 5604 states and 20302 transitions. [2021-06-05 05:53:22,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 20302 transitions. [2021-06-05 05:53:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:22,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:22,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:22,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:53:22,799 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash -591880358, now seen corresponding path program 40 times [2021-06-05 05:53:22,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:22,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037654327] [2021-06-05 05:53:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:22,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:22,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037654327] [2021-06-05 05:53:22,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037654327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:22,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757072539] [2021-06-05 05:53:22,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:22,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:22,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:22,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:22,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:22,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:22,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:22,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:22,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:23,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:53:23,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:23,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:23,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:23,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:47 [2021-06-05 05:53:23,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:23,118 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 05:53:23,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:23,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:23,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:23,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2021-06-05 05:53:23,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:53:23,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:23,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:23,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:23,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:53:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:23,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757072539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:23,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:23,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:53:23,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417207421] [2021-06-05 05:53:23,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:23,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:23,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:23,208 INFO L87 Difference]: Start difference. First operand 5604 states and 20302 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:23,801 INFO L93 Difference]: Finished difference Result 6276 states and 22438 transitions. [2021-06-05 05:53:23,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:53:23,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:23,812 INFO L225 Difference]: With dead ends: 6276 [2021-06-05 05:53:23,812 INFO L226 Difference]: Without dead ends: 6245 [2021-06-05 05:53:23,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:53:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2021-06-05 05:53:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 5600. [2021-06-05 05:53:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 3.6235041971780677) internal successors, (20288), 5599 states have internal predecessors, (20288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 20288 transitions. [2021-06-05 05:53:23,889 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 20288 transitions. Word has length 30 [2021-06-05 05:53:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:23,889 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 20288 transitions. [2021-06-05 05:53:23,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 20288 transitions. [2021-06-05 05:53:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:23,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:23,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:24,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:24,098 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1776448930, now seen corresponding path program 41 times [2021-06-05 05:53:24,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:24,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303899719] [2021-06-05 05:53:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:24,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:24,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303899719] [2021-06-05 05:53:24,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303899719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:24,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341239984] [2021-06-05 05:53:24,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:53:24,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:24,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:24,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:24,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:24,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:24,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:24,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:24,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:24,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:24,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,436 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:53:24,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2021-06-05 05:53:24,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:24,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:24,448 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 05:53:24,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-06-05 05:53:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:24,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 80 [2021-06-05 05:53:24,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:24,629 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.7 percent of original size [2021-06-05 05:53:24,632 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 05:53:24,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:93, output treesize:67 [2021-06-05 05:53:24,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:24,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 62 [2021-06-05 05:53:24,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:24,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:24,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 05:53:24,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:24,759 INFO L628 ElimStorePlain]: treesize reduction 5, result has 87.5 percent of original size [2021-06-05 05:53:24,760 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 05:53:24,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:116, output treesize:20 [2021-06-05 05:53:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:24,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341239984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:24,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:24,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 05:53:24,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927912880] [2021-06-05 05:53:24,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:53:24,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:24,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:53:24,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:53:24,830 INFO L87 Difference]: Start difference. First operand 5600 states and 20288 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:26,115 INFO L93 Difference]: Finished difference Result 6547 states and 23225 transitions. [2021-06-05 05:53:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:53:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:26,127 INFO L225 Difference]: With dead ends: 6547 [2021-06-05 05:53:26,127 INFO L226 Difference]: Without dead ends: 6526 [2021-06-05 05:53:26,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 864.4ms TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:53:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-06-05 05:53:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 5645. [2021-06-05 05:53:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5645 states, 5644 states have (on average 3.6210134656272146) internal successors, (20437), 5644 states have internal predecessors, (20437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5645 states to 5645 states and 20437 transitions. [2021-06-05 05:53:26,213 INFO L78 Accepts]: Start accepts. Automaton has 5645 states and 20437 transitions. Word has length 30 [2021-06-05 05:53:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:26,213 INFO L482 AbstractCegarLoop]: Abstraction has 5645 states and 20437 transitions. [2021-06-05 05:53:26,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5645 states and 20437 transitions. [2021-06-05 05:53:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:26,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:26,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:26,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:26,422 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:26,423 INFO L82 PathProgramCache]: Analyzing trace with hash -808388724, now seen corresponding path program 42 times [2021-06-05 05:53:26,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:26,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647986259] [2021-06-05 05:53:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:26,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:26,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647986259] [2021-06-05 05:53:26,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647986259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:26,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818054664] [2021-06-05 05:53:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:26,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:53:26,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:26,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:53:26,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:26,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:26,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:26,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:26,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:26,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:26,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 05:53:26,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:26,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:26,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:26,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:43 [2021-06-05 05:53:26,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:26,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 23 [2021-06-05 05:53:26,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:26,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:26,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:26,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 05:53:26,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:26,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 28 [2021-06-05 05:53:26,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:26,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:26,949 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 05:53:26,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 05:53:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:27,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818054664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:27,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:27,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 05:53:27,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682234180] [2021-06-05 05:53:27,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:53:27,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:27,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:53:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:53:27,037 INFO L87 Difference]: Start difference. First operand 5645 states and 20437 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:28,009 INFO L93 Difference]: Finished difference Result 6011 states and 21494 transitions. [2021-06-05 05:53:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:53:28,009 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:28,018 INFO L225 Difference]: With dead ends: 6011 [2021-06-05 05:53:28,019 INFO L226 Difference]: Without dead ends: 5996 [2021-06-05 05:53:28,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:53:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2021-06-05 05:53:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5641. [2021-06-05 05:53:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5641 states, 5640 states have (on average 3.621099290780142) internal successors, (20423), 5640 states have internal predecessors, (20423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5641 states to 5641 states and 20423 transitions. [2021-06-05 05:53:28,094 INFO L78 Accepts]: Start accepts. Automaton has 5641 states and 20423 transitions. Word has length 30 [2021-06-05 05:53:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:28,094 INFO L482 AbstractCegarLoop]: Abstraction has 5641 states and 20423 transitions. [2021-06-05 05:53:28,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5641 states and 20423 transitions. [2021-06-05 05:53:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:28,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:28,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:28,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:28,303 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:28,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:28,303 INFO L82 PathProgramCache]: Analyzing trace with hash 935479658, now seen corresponding path program 43 times [2021-06-05 05:53:28,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:28,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911006073] [2021-06-05 05:53:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:28,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:28,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911006073] [2021-06-05 05:53:28,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911006073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:28,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075497541] [2021-06-05 05:53:28,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:53:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:28,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:28,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:28,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:28,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:28,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 05:53:28,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:28,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:52 [2021-06-05 05:53:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:28,692 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 05:53:28,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:28,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:36 [2021-06-05 05:53:28,750 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 20 treesize of output 12 [2021-06-05 05:53:28,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:28,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:53:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:28,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075497541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:28,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:28,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:53:28,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926276489] [2021-06-05 05:53:28,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:28,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:28,783 INFO L87 Difference]: Start difference. First operand 5641 states and 20423 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:29,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:29,280 INFO L93 Difference]: Finished difference Result 6001 states and 21514 transitions. [2021-06-05 05:53:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:53:29,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:29,290 INFO L225 Difference]: With dead ends: 6001 [2021-06-05 05:53:29,290 INFO L226 Difference]: Without dead ends: 5962 [2021-06-05 05:53:29,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:53:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2021-06-05 05:53:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5666. [2021-06-05 05:53:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5666 states, 5665 states have (on average 3.6180052956751987) internal successors, (20496), 5665 states have internal predecessors, (20496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5666 states to 5666 states and 20496 transitions. [2021-06-05 05:53:29,362 INFO L78 Accepts]: Start accepts. Automaton has 5666 states and 20496 transitions. Word has length 30 [2021-06-05 05:53:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:29,362 INFO L482 AbstractCegarLoop]: Abstraction has 5666 states and 20496 transitions. [2021-06-05 05:53:29,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 5666 states and 20496 transitions. [2021-06-05 05:53:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:29,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:29,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:29,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:29,570 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash -837347644, now seen corresponding path program 44 times [2021-06-05 05:53:29,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:29,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861212402] [2021-06-05 05:53:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:29,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:29,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861212402] [2021-06-05 05:53:29,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861212402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:29,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453325749] [2021-06-05 05:53:29,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:53:29,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:29,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:29,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:29,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:29,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:29,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:29,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-06-05 05:53:29,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:29,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:41 [2021-06-05 05:53:29,885 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 28 treesize of output 20 [2021-06-05 05:53:29,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:29,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:25 [2021-06-05 05:53:29,914 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 20 treesize of output 12 [2021-06-05 05:53:29,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:29,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:53:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:29,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453325749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:29,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:29,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:53:29,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546716584] [2021-06-05 05:53:29,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:29,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:29,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:29,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:29,966 INFO L87 Difference]: Start difference. First operand 5666 states and 20496 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:30,601 INFO L93 Difference]: Finished difference Result 6100 states and 21835 transitions. [2021-06-05 05:53:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:53:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:30,611 INFO L225 Difference]: With dead ends: 6100 [2021-06-05 05:53:30,611 INFO L226 Difference]: Without dead ends: 6048 [2021-06-05 05:53:30,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:53:30,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6048 states. [2021-06-05 05:53:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6048 to 5660. [2021-06-05 05:53:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5660 states, 5659 states have (on average 3.618660540731578) internal successors, (20478), 5659 states have internal predecessors, (20478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 20478 transitions. [2021-06-05 05:53:30,682 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 20478 transitions. Word has length 30 [2021-06-05 05:53:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:30,683 INFO L482 AbstractCegarLoop]: Abstraction has 5660 states and 20478 transitions. [2021-06-05 05:53:30,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 20478 transitions. [2021-06-05 05:53:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:30,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:30,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:30,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 05:53:30,891 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:30,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:30,891 INFO L82 PathProgramCache]: Analyzing trace with hash -484971954, now seen corresponding path program 45 times [2021-06-05 05:53:30,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:30,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118147851] [2021-06-05 05:53:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:31,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:31,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118147851] [2021-06-05 05:53:31,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118147851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:31,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367413130] [2021-06-05 05:53:31,017 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 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 05:53:31,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:53:31,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:31,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:53:31,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:31,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:31,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:31,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:31,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:31,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:31,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:53:31,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:31,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:31,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:31,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 05:53:31,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:31,251 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 28 treesize of output 36 [2021-06-05 05:53:31,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:31,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:31,272 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 05:53:31,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:75 [2021-06-05 05:53:31,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:31,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 05:53:31,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:31,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:31,338 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 05:53:31,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:31,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:31,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 05:53:31,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:31,428 INFO L628 ElimStorePlain]: treesize reduction 18, result has 83.5 percent of original size [2021-06-05 05:53:31,433 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 05:53:31,434 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:93, output treesize:100 [2021-06-05 05:53:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:31,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367413130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:31,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:31,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 05:53:31,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282168232] [2021-06-05 05:53:31,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:53:31,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:31,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:53:31,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:53:31,579 INFO L87 Difference]: Start difference. First operand 5660 states and 20478 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:33,007 INFO L93 Difference]: Finished difference Result 6800 states and 23987 transitions. [2021-06-05 05:53:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:53:33,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:33,018 INFO L225 Difference]: With dead ends: 6800 [2021-06-05 05:53:33,019 INFO L226 Difference]: Without dead ends: 6773 [2021-06-05 05:53:33,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1069.2ms TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:33,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-06-05 05:53:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 5650. [2021-06-05 05:53:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5650 states, 5649 states have (on average 3.6204637989024606) internal successors, (20452), 5649 states have internal predecessors, (20452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5650 states to 5650 states and 20452 transitions. [2021-06-05 05:53:33,095 INFO L78 Accepts]: Start accepts. Automaton has 5650 states and 20452 transitions. Word has length 30 [2021-06-05 05:53:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:33,095 INFO L482 AbstractCegarLoop]: Abstraction has 5650 states and 20452 transitions. [2021-06-05 05:53:33,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5650 states and 20452 transitions. [2021-06-05 05:53:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:33,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:33,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:33,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:33,303 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:33,303 INFO L82 PathProgramCache]: Analyzing trace with hash 987993216, now seen corresponding path program 46 times [2021-06-05 05:53:33,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:33,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413879630] [2021-06-05 05:53:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:33,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413879630] [2021-06-05 05:53:33,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413879630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:33,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045569779] [2021-06-05 05:53:33,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:33,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:33,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:33,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:33,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:33,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:33,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:33,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:33,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:33,676 INFO L446 ElimStorePlain]: Different costs {0=[A], 1=[v_C_83]} [2021-06-05 05:53:33,678 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 42 treesize of output 32 [2021-06-05 05:53:33,680 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 05:53:33,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:33,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:33,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-06-05 05:53:33,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:33,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:33,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:33,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:58, output treesize:43 [2021-06-05 05:53:33,727 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 32 treesize of output 20 [2021-06-05 05:53:33,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:33,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:33,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:33,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:53:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:33,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045569779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:33,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:33,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:53:33,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665815482] [2021-06-05 05:53:33,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:53:33,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:33,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:53:33,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:53:33,761 INFO L87 Difference]: Start difference. First operand 5650 states and 20452 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:35,214 INFO L93 Difference]: Finished difference Result 9623 states and 34104 transitions. [2021-06-05 05:53:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:53:35,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:35,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:35,230 INFO L225 Difference]: With dead ends: 9623 [2021-06-05 05:53:35,231 INFO L226 Difference]: Without dead ends: 9565 [2021-06-05 05:53:35,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1047.2ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:53:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9565 states. [2021-06-05 05:53:35,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9565 to 5690. [2021-06-05 05:53:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 5689 states have (on average 3.621023026894006) internal successors, (20600), 5689 states have internal predecessors, (20600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 20600 transitions. [2021-06-05 05:53:35,330 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 20600 transitions. Word has length 30 [2021-06-05 05:53:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:35,330 INFO L482 AbstractCegarLoop]: Abstraction has 5690 states and 20600 transitions. [2021-06-05 05:53:35,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 20600 transitions. [2021-06-05 05:53:35,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:35,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:35,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:35,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:35,539 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:35,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:35,540 INFO L82 PathProgramCache]: Analyzing trace with hash 438322848, now seen corresponding path program 47 times [2021-06-05 05:53:35,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:35,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214518034] [2021-06-05 05:53:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:35,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214518034] [2021-06-05 05:53:35,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214518034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558014437] [2021-06-05 05:53:35,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:35,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:35,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:35,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:53:35,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:35,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:35,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:35,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:35,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:35,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:35,963 INFO L354 Elim1Store]: treesize reduction 62, result has 17.3 percent of original size [2021-06-05 05:53:35,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 83 [2021-06-05 05:53:35,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:35,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:35,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:35,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:107, output treesize:40 [2021-06-05 05:53:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:36,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:36,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 46 [2021-06-05 05:53:36,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:36,053 INFO L628 ElimStorePlain]: treesize reduction 33, result has 51.5 percent of original size [2021-06-05 05:53:36,055 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 05:53:36,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:34 [2021-06-05 05:53:36,129 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 20 treesize of output 12 [2021-06-05 05:53:36,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:36,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:36,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:36,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:53:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:36,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558014437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:36,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:36,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 05:53:36,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735931847] [2021-06-05 05:53:36,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:53:36,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:36,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:53:36,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:53:36,163 INFO L87 Difference]: Start difference. First operand 5690 states and 20600 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:37,314 INFO L93 Difference]: Finished difference Result 9282 states and 33218 transitions. [2021-06-05 05:53:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:53:37,315 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:37,331 INFO L225 Difference]: With dead ends: 9282 [2021-06-05 05:53:37,331 INFO L226 Difference]: Without dead ends: 9210 [2021-06-05 05:53:37,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 846.8ms TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9210 states. [2021-06-05 05:53:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9210 to 5726. [2021-06-05 05:53:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5725 states have (on average 3.61764192139738) internal successors, (20711), 5725 states have internal predecessors, (20711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 20711 transitions. [2021-06-05 05:53:37,423 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 20711 transitions. Word has length 30 [2021-06-05 05:53:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:37,424 INFO L482 AbstractCegarLoop]: Abstraction has 5726 states and 20711 transitions. [2021-06-05 05:53:37,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 20711 transitions. [2021-06-05 05:53:37,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:37,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:37,431 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:37,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:37,632 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:37,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1334504454, now seen corresponding path program 48 times [2021-06-05 05:53:37,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:37,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868061807] [2021-06-05 05:53:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:37,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:37,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868061807] [2021-06-05 05:53:37,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868061807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:37,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220008699] [2021-06-05 05:53:37,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:37,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:53:37,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:37,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:37,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:37,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:37,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 05:53:37,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:45 [2021-06-05 05:53:37,943 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 27 [2021-06-05 05:53:37,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 05:53:37,980 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 18 [2021-06-05 05:53:37,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 05:53:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:38,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220008699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:38,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:38,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:53:38,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500910477] [2021-06-05 05:53:38,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:53:38,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:38,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:53:38,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:53:38,037 INFO L87 Difference]: Start difference. First operand 5726 states and 20711 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:39,026 INFO L93 Difference]: Finished difference Result 11286 states and 40280 transitions. [2021-06-05 05:53:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:53:39,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:39,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:39,045 INFO L225 Difference]: With dead ends: 11286 [2021-06-05 05:53:39,046 INFO L226 Difference]: Without dead ends: 11232 [2021-06-05 05:53:39,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1095, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:53:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11232 states. [2021-06-05 05:53:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11232 to 5720. [2021-06-05 05:53:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 5719 states have (on average 3.6189893337996155) internal successors, (20697), 5719 states have internal predecessors, (20697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 20697 transitions. [2021-06-05 05:53:39,170 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 20697 transitions. Word has length 30 [2021-06-05 05:53:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:39,170 INFO L482 AbstractCegarLoop]: Abstraction has 5720 states and 20697 transitions. [2021-06-05 05:53:39,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 20697 transitions. [2021-06-05 05:53:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:39,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:39,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:39,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 05:53:39,378 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:39,378 INFO L82 PathProgramCache]: Analyzing trace with hash -982128764, now seen corresponding path program 49 times [2021-06-05 05:53:39,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:39,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307197789] [2021-06-05 05:53:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:39,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:39,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307197789] [2021-06-05 05:53:39,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307197789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:39,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944570381] [2021-06-05 05:53:39,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:39,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:39,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:39,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:39,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:39,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:39,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-06-05 05:53:39,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:39,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:39,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:39,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:55 [2021-06-05 05:53:39,748 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 33 treesize of output 23 [2021-06-05 05:53:39,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:39,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:39,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:39,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-06-05 05:53:39,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 05:53:39,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:39,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:39,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:39,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:53:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:39,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944570381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:39,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:39,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:53:39,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761645066] [2021-06-05 05:53:39,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:53:39,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:53:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:53:39,830 INFO L87 Difference]: Start difference. First operand 5720 states and 20697 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:41,125 INFO L93 Difference]: Finished difference Result 9882 states and 35134 transitions. [2021-06-05 05:53:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:53:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:41,142 INFO L225 Difference]: With dead ends: 9882 [2021-06-05 05:53:41,143 INFO L226 Difference]: Without dead ends: 9816 [2021-06-05 05:53:41,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 899.7ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-06-05 05:53:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 5724. [2021-06-05 05:53:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5724 states, 5723 states have (on average 3.6194303686877514) internal successors, (20714), 5723 states have internal predecessors, (20714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 20714 transitions. [2021-06-05 05:53:41,234 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 20714 transitions. Word has length 30 [2021-06-05 05:53:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:41,234 INFO L482 AbstractCegarLoop]: Abstraction has 5724 states and 20714 transitions. [2021-06-05 05:53:41,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 20714 transitions. [2021-06-05 05:53:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:41,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:41,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:41,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 05:53:41,442 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:41,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:41,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1881355712, now seen corresponding path program 50 times [2021-06-05 05:53:41,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:41,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445659677] [2021-06-05 05:53:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:41,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:41,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445659677] [2021-06-05 05:53:41,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445659677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:41,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536184131] [2021-06-05 05:53:41,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:53:41,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:41,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:41,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:41,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:41,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:41,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:41,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:41,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:41,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:41,791 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 51 treesize of output 35 [2021-06-05 05:53:41,792 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 05:53:41,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:41,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 05:53:41,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:41,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:41,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:41,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:47 [2021-06-05 05:53:41,840 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 05:53:41,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:41,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:41,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:41,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:53:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:41,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536184131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:41,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:41,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:53:41,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834797749] [2021-06-05 05:53:41,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:53:41,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:41,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:53:41,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:53:41,874 INFO L87 Difference]: Start difference. First operand 5724 states and 20714 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:42,755 INFO L93 Difference]: Finished difference Result 9332 states and 33363 transitions. [2021-06-05 05:53:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:53:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:42,771 INFO L225 Difference]: With dead ends: 9332 [2021-06-05 05:53:42,771 INFO L226 Difference]: Without dead ends: 9290 [2021-06-05 05:53:42,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:53:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9290 states. [2021-06-05 05:53:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9290 to 5749. [2021-06-05 05:53:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5749 states, 5748 states have (on average 3.6176061238691717) internal successors, (20794), 5748 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5749 states to 5749 states and 20794 transitions. [2021-06-05 05:53:42,861 INFO L78 Accepts]: Start accepts. Automaton has 5749 states and 20794 transitions. Word has length 30 [2021-06-05 05:53:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:42,861 INFO L482 AbstractCegarLoop]: Abstraction has 5749 states and 20794 transitions. [2021-06-05 05:53:42,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5749 states and 20794 transitions. [2021-06-05 05:53:42,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:42,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:42,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:43,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:43,069 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:43,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:43,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1045273622, now seen corresponding path program 51 times [2021-06-05 05:53:43,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:43,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18393801] [2021-06-05 05:53:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:43,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18393801] [2021-06-05 05:53:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18393801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917080986] [2021-06-05 05:53:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:53:43,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:53:43,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:43,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:43,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:43,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:43,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:43,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:43,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:43,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:43,474 INFO L446 ElimStorePlain]: Different costs {2=[v_C_93], 3=[A]} [2021-06-05 05:53:43,486 INFO L354 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2021-06-05 05:53:43,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 70 [2021-06-05 05:53:43,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:43,520 INFO L628 ElimStorePlain]: treesize reduction 39, result has 58.9 percent of original size [2021-06-05 05:53:43,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:43,528 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-05 05:53:43,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 33 [2021-06-05 05:53:43,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:43,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:43,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 05:53:43,538 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:42 [2021-06-05 05:53:43,612 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 05:53:43,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-06-05 05:53:43,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:43,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:43,632 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 05:53:43,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:15 [2021-06-05 05:53:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:43,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917080986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:43,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:43,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 05:53:43,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820256594] [2021-06-05 05:53:43,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:43,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:43,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:43,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:43,666 INFO L87 Difference]: Start difference. First operand 5749 states and 20794 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:44,624 INFO L93 Difference]: Finished difference Result 9027 states and 32432 transitions. [2021-06-05 05:53:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:53:44,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:44,639 INFO L225 Difference]: With dead ends: 9027 [2021-06-05 05:53:44,640 INFO L226 Difference]: Without dead ends: 9000 [2021-06-05 05:53:44,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 682.9ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:53:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2021-06-05 05:53:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 5757. [2021-06-05 05:53:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5757 states, 5756 states have (on average 3.6179638637943015) internal successors, (20825), 5756 states have internal predecessors, (20825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5757 states to 5757 states and 20825 transitions. [2021-06-05 05:53:44,760 INFO L78 Accepts]: Start accepts. Automaton has 5757 states and 20825 transitions. Word has length 30 [2021-06-05 05:53:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:44,760 INFO L482 AbstractCegarLoop]: Abstraction has 5757 states and 20825 transitions. [2021-06-05 05:53:44,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 5757 states and 20825 transitions. [2021-06-05 05:53:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:44,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:44,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:44,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 05:53:44,968 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash 323751962, now seen corresponding path program 52 times [2021-06-05 05:53:44,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:44,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044002714] [2021-06-05 05:53:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:45,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:45,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044002714] [2021-06-05 05:53:45,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044002714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:45,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104332321] [2021-06-05 05:53:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:45,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:45,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:45,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:45,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:45,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:45,332 INFO L446 ElimStorePlain]: Different costs {1=[v_C_95], 5=[A]} [2021-06-05 05:53:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:45,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:53:45,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:45,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:45,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-06-05 05:53:45,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:45,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:26 [2021-06-05 05:53:45,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:53:45,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:45,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 05:53:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104332321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:45,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:45,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 05:53:45,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537392394] [2021-06-05 05:53:45,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:53:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:45,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:53:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:53:45,441 INFO L87 Difference]: Start difference. First operand 5757 states and 20825 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:47,548 INFO L93 Difference]: Finished difference Result 13617 states and 47037 transitions. [2021-06-05 05:53:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:53:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:47,572 INFO L225 Difference]: With dead ends: 13617 [2021-06-05 05:53:47,572 INFO L226 Difference]: Without dead ends: 13557 [2021-06-05 05:53:47,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1523.2ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:53:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13557 states. [2021-06-05 05:53:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13557 to 5924. [2021-06-05 05:53:47,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 5923 states have (on average 3.6265406044234343) internal successors, (21480), 5923 states have internal predecessors, (21480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 21480 transitions. [2021-06-05 05:53:47,721 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 21480 transitions. Word has length 30 [2021-06-05 05:53:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:47,721 INFO L482 AbstractCegarLoop]: Abstraction has 5924 states and 21480 transitions. [2021-06-05 05:53:47,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 21480 transitions. [2021-06-05 05:53:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:47,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:47,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:47,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:47,930 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:47,930 INFO L82 PathProgramCache]: Analyzing trace with hash 470064310, now seen corresponding path program 53 times [2021-06-05 05:53:47,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:47,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773218625] [2021-06-05 05:53:47,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:48,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:48,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773218625] [2021-06-05 05:53:48,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773218625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:48,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491605348] [2021-06-05 05:53:48,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:48,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:48,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:53:48,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:48,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:48,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:48,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 05:53:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:48,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:53:48,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:48,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:57 [2021-06-05 05:53:48,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:48,313 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 47 treesize of output 31 [2021-06-05 05:53:48,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:48,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 05:53:48,379 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 18 [2021-06-05 05:53:48,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:48,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 05:53:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:48,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491605348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:48,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:48,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:53:48,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248630002] [2021-06-05 05:53:48,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:53:48,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:53:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:53:48,418 INFO L87 Difference]: Start difference. First operand 5924 states and 21480 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:49,295 INFO L93 Difference]: Finished difference Result 10078 states and 36082 transitions. [2021-06-05 05:53:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:53:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:49,313 INFO L225 Difference]: With dead ends: 10078 [2021-06-05 05:53:49,313 INFO L226 Difference]: Without dead ends: 9980 [2021-06-05 05:53:49,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 568.9ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:53:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-06-05 05:53:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 6302. [2021-06-05 05:53:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6302 states, 6301 states have (on average 3.6176797333756547) internal successors, (22795), 6301 states have internal predecessors, (22795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 22795 transitions. [2021-06-05 05:53:49,423 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 22795 transitions. Word has length 30 [2021-06-05 05:53:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:49,423 INFO L482 AbstractCegarLoop]: Abstraction has 6302 states and 22795 transitions. [2021-06-05 05:53:49,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 22795 transitions. [2021-06-05 05:53:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:49,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:49,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:49,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:49,632 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:49,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:49,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1302762992, now seen corresponding path program 54 times [2021-06-05 05:53:49,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:49,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421191521] [2021-06-05 05:53:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:49,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:49,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421191521] [2021-06-05 05:53:49,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421191521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:49,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389430117] [2021-06-05 05:53:49,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:49,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:53:49,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:49,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:49,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:49,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:49,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:49,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:49,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:49,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:49,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:49,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:53:49,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:49,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:49,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:49,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:53 [2021-06-05 05:53:50,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 27 [2021-06-05 05:53:50,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:50,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:50,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:50,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 05:53:50,038 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 18 [2021-06-05 05:53:50,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:50,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:50,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:50,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 05:53:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:50,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389430117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:50,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:50,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:53:50,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130956538] [2021-06-05 05:53:50,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:53:50,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:50,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:53:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:53:50,096 INFO L87 Difference]: Start difference. First operand 6302 states and 22795 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:51,152 INFO L93 Difference]: Finished difference Result 12838 states and 45680 transitions. [2021-06-05 05:53:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:53:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:51,176 INFO L225 Difference]: With dead ends: 12838 [2021-06-05 05:53:51,176 INFO L226 Difference]: Without dead ends: 12752 [2021-06-05 05:53:51,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:53:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12752 states. [2021-06-05 05:53:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12752 to 6296. [2021-06-05 05:53:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6296 states, 6295 states have (on average 3.6204924543288324) internal successors, (22791), 6295 states have internal predecessors, (22791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 22791 transitions. [2021-06-05 05:53:51,301 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 22791 transitions. Word has length 30 [2021-06-05 05:53:51,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:51,301 INFO L482 AbstractCegarLoop]: Abstraction has 6296 states and 22791 transitions. [2021-06-05 05:53:51,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,301 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 22791 transitions. [2021-06-05 05:53:51,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:51,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:51,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:51,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:51,517 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -950387302, now seen corresponding path program 55 times [2021-06-05 05:53:51,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:51,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648557862] [2021-06-05 05:53:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:51,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:51,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648557862] [2021-06-05 05:53:51,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648557862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:51,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732778013] [2021-06-05 05:53:51,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:51,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:51,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:51,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:51,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:51,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:51,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:51,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:51,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:53:51,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:51,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:53 [2021-06-05 05:53:51,883 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 37 treesize of output 27 [2021-06-05 05:53:51,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:51,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:34 [2021-06-05 05:53:51,915 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 05:53:51,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:51,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:51,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:53:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:51,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732778013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:51,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:51,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:53:51,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300298892] [2021-06-05 05:53:51,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:53:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:51,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:53:51,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:53:51,975 INFO L87 Difference]: Start difference. First operand 6296 states and 22791 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:52,917 INFO L93 Difference]: Finished difference Result 10684 states and 38096 transitions. [2021-06-05 05:53:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:53:52,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:52,938 INFO L225 Difference]: With dead ends: 10684 [2021-06-05 05:53:52,938 INFO L226 Difference]: Without dead ends: 10555 [2021-06-05 05:53:52,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:53:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10555 states. [2021-06-05 05:53:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10555 to 6248. [2021-06-05 05:53:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 3.6265407395549865) internal successors, (22655), 6247 states have internal predecessors, (22655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:53,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 22655 transitions. [2021-06-05 05:53:53,052 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 22655 transitions. Word has length 30 [2021-06-05 05:53:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:53,052 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 22655 transitions. [2021-06-05 05:53:53,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 22655 transitions. [2021-06-05 05:53:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:53,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:53,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:53,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:53,278 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2017761004, now seen corresponding path program 56 times [2021-06-05 05:53:53,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:53,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053685239] [2021-06-05 05:53:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:53,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:53,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053685239] [2021-06-05 05:53:53,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053685239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:53,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653326009] [2021-06-05 05:53:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:53,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:53,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:53,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:53,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:53,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:53,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:53,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:53:53,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:53,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:58 [2021-06-05 05:53:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:53,716 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 44 treesize of output 30 [2021-06-05 05:53:53,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:53,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 05:53:53,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:53:53,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:53,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:53:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:53,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653326009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:53,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:53,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 05:53:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527323182] [2021-06-05 05:53:53,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:53,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:53,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:53,854 INFO L87 Difference]: Start difference. First operand 6248 states and 22655 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:54,556 INFO L93 Difference]: Finished difference Result 10506 states and 37441 transitions. [2021-06-05 05:53:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:53:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:54,576 INFO L225 Difference]: With dead ends: 10506 [2021-06-05 05:53:54,576 INFO L226 Difference]: Without dead ends: 10403 [2021-06-05 05:53:54,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:53:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2021-06-05 05:53:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 6290. [2021-06-05 05:53:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6290 states, 6289 states have (on average 3.6283987915407856) internal successors, (22819), 6289 states have internal predecessors, (22819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6290 states to 6290 states and 22819 transitions. [2021-06-05 05:53:54,693 INFO L78 Accepts]: Start accepts. Automaton has 6290 states and 22819 transitions. Word has length 30 [2021-06-05 05:53:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:54,694 INFO L482 AbstractCegarLoop]: Abstraction has 6290 states and 22819 transitions. [2021-06-05 05:53:54,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 6290 states and 22819 transitions. [2021-06-05 05:53:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:54,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:54,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:54,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 05:53:54,917 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash 663932180, now seen corresponding path program 57 times [2021-06-05 05:53:54,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:54,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378115445] [2021-06-05 05:53:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:55,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378115445] [2021-06-05 05:53:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378115445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389913679] [2021-06-05 05:53:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:55,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:53:55,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:55,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:55,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:55,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:55,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:55,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:55,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:53:55,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:53:55,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:55,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:55,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:55,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-06-05 05:53:55,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:55,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 05:53:55,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:55,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:55,279 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 05:53:55,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:74 [2021-06-05 05:53:55,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:55,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:53:55,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:55,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:55,431 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 05:53:55,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 05:53:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:55,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389913679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:55,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:55,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 05:53:55,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354570841] [2021-06-05 05:53:55,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:53:55,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:55,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:53:55,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:53:55,519 INFO L87 Difference]: Start difference. First operand 6290 states and 22819 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:56,469 INFO L93 Difference]: Finished difference Result 6817 states and 24383 transitions. [2021-06-05 05:53:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:53:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:56,482 INFO L225 Difference]: With dead ends: 6817 [2021-06-05 05:53:56,482 INFO L226 Difference]: Without dead ends: 6745 [2021-06-05 05:53:56,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:53:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-06-05 05:53:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 6296. [2021-06-05 05:53:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6296 states, 6295 states have (on average 3.627164416203336) internal successors, (22833), 6295 states have internal predecessors, (22833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 22833 transitions. [2021-06-05 05:53:56,579 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 22833 transitions. Word has length 30 [2021-06-05 05:53:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:56,579 INFO L482 AbstractCegarLoop]: Abstraction has 6296 states and 22833 transitions. [2021-06-05 05:53:56,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 22833 transitions. [2021-06-05 05:53:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:56,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:56,589 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:56,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:53:56,801 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:56,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1055903956, now seen corresponding path program 58 times [2021-06-05 05:53:56,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:56,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473382165] [2021-06-05 05:53:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:57,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:57,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473382165] [2021-06-05 05:53:57,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473382165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:57,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301234552] [2021-06-05 05:53:57,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:57,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:57,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:57,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:53:57,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:57,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:57,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:57,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:57,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:57,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:57,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 05:53:57,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:57,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:50 [2021-06-05 05:53:57,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:57,213 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 25 [2021-06-05 05:53:57,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:57,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:36 [2021-06-05 05:53:57,248 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 20 treesize of output 12 [2021-06-05 05:53:57,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:57,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:53:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:57,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301234552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:57,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:57,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:53:57,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416049919] [2021-06-05 05:53:57,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:53:57,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:53:57,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:53:57,311 INFO L87 Difference]: Start difference. First operand 6296 states and 22833 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:57,869 INFO L93 Difference]: Finished difference Result 6888 states and 24695 transitions. [2021-06-05 05:53:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:53:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:57,882 INFO L225 Difference]: With dead ends: 6888 [2021-06-05 05:53:57,882 INFO L226 Difference]: Without dead ends: 6845 [2021-06-05 05:53:57,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 412.0ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:53:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2021-06-05 05:53:57,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6271. [2021-06-05 05:53:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 3.6299840510366828) internal successors, (22760), 6270 states have internal predecessors, (22760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 22760 transitions. [2021-06-05 05:53:57,972 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 22760 transitions. Word has length 30 [2021-06-05 05:53:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:57,973 INFO L482 AbstractCegarLoop]: Abstraction has 6271 states and 22760 transitions. [2021-06-05 05:53:57,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 22760 transitions. [2021-06-05 05:53:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:57,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:57,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:58,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 05:53:58,183 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:58,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:58,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1559919772, now seen corresponding path program 59 times [2021-06-05 05:53:58,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:58,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391392047] [2021-06-05 05:53:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:58,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:58,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391392047] [2021-06-05 05:53:58,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391392047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:58,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569097206] [2021-06-05 05:53:58,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:58,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:58,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:58,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:53:58,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:58,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:53:58,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:58,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 05:53:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:58,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 05:53:58,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:58,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-06-05 05:53:58,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:58,541 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 23 [2021-06-05 05:53:58,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:58,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 05:53:58,637 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 20 treesize of output 12 [2021-06-05 05:53:58,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:58,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:53:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:58,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569097206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:58,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:58,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 05:53:58,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156155687] [2021-06-05 05:53:58,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:53:58,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:58,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:53:58,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:53:58,671 INFO L87 Difference]: Start difference. First operand 6271 states and 22760 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:59,116 INFO L93 Difference]: Finished difference Result 6494 states and 23388 transitions. [2021-06-05 05:53:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:53:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:53:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:59,129 INFO L225 Difference]: With dead ends: 6494 [2021-06-05 05:53:59,129 INFO L226 Difference]: Without dead ends: 6473 [2021-06-05 05:53:59,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:53:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6473 states. [2021-06-05 05:53:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6473 to 6277. [2021-06-05 05:53:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6277 states, 6276 states have (on average 3.6303377947737414) internal successors, (22784), 6276 states have internal predecessors, (22784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6277 states to 6277 states and 22784 transitions. [2021-06-05 05:53:59,243 INFO L78 Accepts]: Start accepts. Automaton has 6277 states and 22784 transitions. Word has length 30 [2021-06-05 05:53:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:59,243 INFO L482 AbstractCegarLoop]: Abstraction has 6277 states and 22784 transitions. [2021-06-05 05:53:59,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6277 states and 22784 transitions. [2021-06-05 05:53:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:53:59,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:59,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:59,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:53:59,453 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash -144940482, now seen corresponding path program 60 times [2021-06-05 05:53:59,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:59,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498912149] [2021-06-05 05:53:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:59,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498912149] [2021-06-05 05:53:59,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498912149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:59,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333760905] [2021-06-05 05:53:59,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:59,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:53:59,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:53:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:59,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:53:59,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:59,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:59,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:59,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:53:59,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:59,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:53:59,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:59,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:59,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:59,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:47 [2021-06-05 05:53:59,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 05:53:59,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:59,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:59,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:59,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 05:53:59,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:59,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 28 [2021-06-05 05:53:59,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:53:59,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:59,907 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 05:53:59,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:93 [2021-06-05 05:54:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:00,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333760905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:00,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:00,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 05:54:00,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95823293] [2021-06-05 05:54:00,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:54:00,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:54:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:54:00,028 INFO L87 Difference]: Start difference. First operand 6277 states and 22784 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:01,021 INFO L93 Difference]: Finished difference Result 6929 states and 24693 transitions. [2021-06-05 05:54:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:54:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:01,033 INFO L225 Difference]: With dead ends: 6929 [2021-06-05 05:54:01,033 INFO L226 Difference]: Without dead ends: 6887 [2021-06-05 05:54:01,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:54:01,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-06-05 05:54:01,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 6286. [2021-06-05 05:54:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6286 states, 6285 states have (on average 3.6307080350039778) internal successors, (22819), 6285 states have internal predecessors, (22819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6286 states to 6286 states and 22819 transitions. [2021-06-05 05:54:01,126 INFO L78 Accepts]: Start accepts. Automaton has 6286 states and 22819 transitions. Word has length 30 [2021-06-05 05:54:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:01,126 INFO L482 AbstractCegarLoop]: Abstraction has 6286 states and 22819 transitions. [2021-06-05 05:54:01,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6286 states and 22819 transitions. [2021-06-05 05:54:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:01,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:01,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:01,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 05:54:01,336 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:01,336 INFO L82 PathProgramCache]: Analyzing trace with hash 260501498, now seen corresponding path program 61 times [2021-06-05 05:54:01,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:01,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408636204] [2021-06-05 05:54:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:01,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:01,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408636204] [2021-06-05 05:54:01,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408636204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:01,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593420484] [2021-06-05 05:54:01,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:01,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:01,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:01,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:01,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:01,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:01,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:01,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:01,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:01,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:01,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:01,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:47 [2021-06-05 05:54:01,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:01,619 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 25 [2021-06-05 05:54:01,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:01,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:01,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:01,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:30 [2021-06-05 05:54:01,672 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 20 treesize of output 12 [2021-06-05 05:54:01,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:01,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:01,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:01,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:54:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:01,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593420484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:01,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:01,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:54:01,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934034613] [2021-06-05 05:54:01,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:54:01,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:01,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:54:01,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:54:01,723 INFO L87 Difference]: Start difference. First operand 6286 states and 22819 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:02,256 INFO L93 Difference]: Finished difference Result 6957 states and 24946 transitions. [2021-06-05 05:54:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:54:02,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:02,267 INFO L225 Difference]: With dead ends: 6957 [2021-06-05 05:54:02,267 INFO L226 Difference]: Without dead ends: 6942 [2021-06-05 05:54:02,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:54:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2021-06-05 05:54:02,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6271. [2021-06-05 05:54:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 3.6299840510366828) internal successors, (22760), 6270 states have internal predecessors, (22760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 22760 transitions. [2021-06-05 05:54:02,345 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 22760 transitions. Word has length 30 [2021-06-05 05:54:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:02,346 INFO L482 AbstractCegarLoop]: Abstraction has 6271 states and 22760 transitions. [2021-06-05 05:54:02,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 22760 transitions. [2021-06-05 05:54:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:02,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:02,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:02,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:02,555 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:02,555 INFO L82 PathProgramCache]: Analyzing trace with hash -814318776, now seen corresponding path program 62 times [2021-06-05 05:54:02,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:02,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772188097] [2021-06-05 05:54:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:02,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:02,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772188097] [2021-06-05 05:54:02,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772188097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:02,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221269156] [2021-06-05 05:54:02,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:54:02,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:02,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:02,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:02,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:54:02,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:02,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:54:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:02,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:02,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:02,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:52 [2021-06-05 05:54:02,871 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-06-05 05:54:02,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 98 [2021-06-05 05:54:02,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:02,881 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 05:54:02,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:158, output treesize:36 [2021-06-05 05:54:02,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:54:02,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:02,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:54:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:02,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221269156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:02,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:02,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:54:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391957591] [2021-06-05 05:54:02,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:54:02,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:54:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:54:02,961 INFO L87 Difference]: Start difference. First operand 6271 states and 22760 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:03,684 INFO L93 Difference]: Finished difference Result 6835 states and 24442 transitions. [2021-06-05 05:54:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:54:03,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:03,696 INFO L225 Difference]: With dead ends: 6835 [2021-06-05 05:54:03,696 INFO L226 Difference]: Without dead ends: 6798 [2021-06-05 05:54:03,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:54:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-06-05 05:54:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6275. [2021-06-05 05:54:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6275 states, 6274 states have (on average 3.629901179470832) internal successors, (22774), 6274 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 22774 transitions. [2021-06-05 05:54:03,791 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 22774 transitions. Word has length 30 [2021-06-05 05:54:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:03,792 INFO L482 AbstractCegarLoop]: Abstraction has 6275 states and 22774 transitions. [2021-06-05 05:54:03,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 22774 transitions. [2021-06-05 05:54:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:03,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:03,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:04,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:04,002 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1603347326, now seen corresponding path program 63 times [2021-06-05 05:54:04,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:04,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990418877] [2021-06-05 05:54:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:04,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:04,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990418877] [2021-06-05 05:54:04,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990418877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:04,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575138119] [2021-06-05 05:54:04,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:04,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:54:04,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:04,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:54:04,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:04,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:54:04,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:04,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:54:04,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:04,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 05:54:04,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:04,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 05:54:04,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:04,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 05:54:04,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:04,427 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 05:54:04,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:115 [2021-06-05 05:54:04,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:54:04,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,498 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 19 treesize of output 13 [2021-06-05 05:54:04,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,501 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 9 treesize of output 5 [2021-06-05 05:54:04,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:04,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:04,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:54:04,522 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:88, output treesize:52 [2021-06-05 05:54:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:04,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575138119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:04,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:04,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 05:54:04,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485008379] [2021-06-05 05:54:04,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:54:04,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:04,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:54:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:54:04,634 INFO L87 Difference]: Start difference. First operand 6275 states and 22774 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:06,015 INFO L93 Difference]: Finished difference Result 6597 states and 23655 transitions. [2021-06-05 05:54:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:54:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:06,028 INFO L225 Difference]: With dead ends: 6597 [2021-06-05 05:54:06,029 INFO L226 Difference]: Without dead ends: 6553 [2021-06-05 05:54:06,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 797.4ms TimeCoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:54:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6553 states. [2021-06-05 05:54:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6553 to 6269. [2021-06-05 05:54:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6269 states, 6268 states have (on average 3.629227823867262) internal successors, (22748), 6268 states have internal predecessors, (22748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 22748 transitions. [2021-06-05 05:54:06,120 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 22748 transitions. Word has length 30 [2021-06-05 05:54:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:06,120 INFO L482 AbstractCegarLoop]: Abstraction has 6269 states and 22748 transitions. [2021-06-05 05:54:06,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 22748 transitions. [2021-06-05 05:54:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:06,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:06,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:06,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-05 05:54:06,346 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:06,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1832361604, now seen corresponding path program 64 times [2021-06-05 05:54:06,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:06,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950402569] [2021-06-05 05:54:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:06,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950402569] [2021-06-05 05:54:06,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950402569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312797036] [2021-06-05 05:54:06,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:06,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:06,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:06,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:06,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:06,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:06,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:06,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:06,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:06,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:06,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:54 [2021-06-05 05:54:06,715 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 29 treesize of output 23 [2021-06-05 05:54:06,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:06,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:25 [2021-06-05 05:54:06,750 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 20 treesize of output 12 [2021-06-05 05:54:06,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:06,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:54:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:06,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312797036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:06,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-05 05:54:06,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573100087] [2021-06-05 05:54:06,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:54:06,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:54:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:54:06,785 INFO L87 Difference]: Start difference. First operand 6269 states and 22748 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:07,246 INFO L93 Difference]: Finished difference Result 6385 states and 23050 transitions. [2021-06-05 05:54:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:54:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:07,259 INFO L225 Difference]: With dead ends: 6385 [2021-06-05 05:54:07,259 INFO L226 Difference]: Without dead ends: 6363 [2021-06-05 05:54:07,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:54:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2021-06-05 05:54:07,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 6233. [2021-06-05 05:54:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6233 states, 6232 states have (on average 3.6331835686777922) internal successors, (22642), 6232 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6233 states to 6233 states and 22642 transitions. [2021-06-05 05:54:07,349 INFO L78 Accepts]: Start accepts. Automaton has 6233 states and 22642 transitions. Word has length 30 [2021-06-05 05:54:07,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:07,350 INFO L482 AbstractCegarLoop]: Abstraction has 6233 states and 22642 transitions. [2021-06-05 05:54:07,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 6233 states and 22642 transitions. [2021-06-05 05:54:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:07,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:07,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:07,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:07,560 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:07,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1741867956, now seen corresponding path program 65 times [2021-06-05 05:54:07,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:07,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329286389] [2021-06-05 05:54:07,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:07,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:07,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329286389] [2021-06-05 05:54:07,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329286389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:07,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090753142] [2021-06-05 05:54:07,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:07,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:07,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:07,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:07,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:54:07,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:07,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:07,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:07,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:54:07,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:07,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:54:07,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:07,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:07,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:07,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 05:54:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:07,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:07,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2021-06-05 05:54:08,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:54:08,072 INFO L628 ElimStorePlain]: treesize reduction 81, result has 50.6 percent of original size [2021-06-05 05:54:08,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:08,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:115 [2021-06-05 05:54:08,163 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 20 treesize of output 12 [2021-06-05 05:54:08,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:08,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:08,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:08,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:54:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:08,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090753142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:08,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:08,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 05:54:08,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071361344] [2021-06-05 05:54:08,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:54:08,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:54:08,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:54:08,199 INFO L87 Difference]: Start difference. First operand 6233 states and 22642 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:09,156 INFO L93 Difference]: Finished difference Result 6975 states and 24902 transitions. [2021-06-05 05:54:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:54:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:09,168 INFO L225 Difference]: With dead ends: 6975 [2021-06-05 05:54:09,168 INFO L226 Difference]: Without dead ends: 6924 [2021-06-05 05:54:09,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 637.8ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:54:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6924 states. [2021-06-05 05:54:09,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6924 to 6343. [2021-06-05 05:54:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6343 states, 6342 states have (on average 3.6255124566382846) internal successors, (22993), 6342 states have internal predecessors, (22993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6343 states to 6343 states and 22993 transitions. [2021-06-05 05:54:09,254 INFO L78 Accepts]: Start accepts. Automaton has 6343 states and 22993 transitions. Word has length 30 [2021-06-05 05:54:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:09,254 INFO L482 AbstractCegarLoop]: Abstraction has 6343 states and 22993 transitions. [2021-06-05 05:54:09,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6343 states and 22993 transitions. [2021-06-05 05:54:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:09,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:09,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:09,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:09,464 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:09,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:09,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1349896180, now seen corresponding path program 66 times [2021-06-05 05:54:09,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:09,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597291450] [2021-06-05 05:54:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:09,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:09,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597291450] [2021-06-05 05:54:09,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597291450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:09,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975547979] [2021-06-05 05:54:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:09,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:54:09,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:09,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:09,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:09,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:09,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:09,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:09,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:09,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:09,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:09,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:09,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:09,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:09,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:50 [2021-06-05 05:54:09,766 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 27 [2021-06-05 05:54:09,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:09,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:09,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:09,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 05:54:09,801 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 18 [2021-06-05 05:54:09,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:09,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:09,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:09,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 05:54:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:09,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975547979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:09,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:09,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:54:09,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691625326] [2021-06-05 05:54:09,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:54:09,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:54:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:54:09,860 INFO L87 Difference]: Start difference. First operand 6343 states and 22993 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:10,614 INFO L93 Difference]: Finished difference Result 7674 states and 27186 transitions. [2021-06-05 05:54:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:54:10,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:10,627 INFO L225 Difference]: With dead ends: 7674 [2021-06-05 05:54:10,627 INFO L226 Difference]: Without dead ends: 7631 [2021-06-05 05:54:10,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:54:10,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7631 states. [2021-06-05 05:54:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7631 to 6367. [2021-06-05 05:54:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6366 states have (on average 3.622525918944392) internal successors, (23061), 6366 states have internal predecessors, (23061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 23061 transitions. [2021-06-05 05:54:10,733 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 23061 transitions. Word has length 30 [2021-06-05 05:54:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:10,733 INFO L482 AbstractCegarLoop]: Abstraction has 6367 states and 23061 transitions. [2021-06-05 05:54:10,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 23061 transitions. [2021-06-05 05:54:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:10,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:10,742 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:10,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 05:54:10,942 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1760502544, now seen corresponding path program 67 times [2021-06-05 05:54:10,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:10,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000339833] [2021-06-05 05:54:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:11,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:11,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000339833] [2021-06-05 05:54:11,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000339833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:11,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487680141] [2021-06-05 05:54:11,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:11,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:11,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:11,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:54:11,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:11,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:11,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:11,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:54:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:11,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:11,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:11,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:11,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:11,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:57 [2021-06-05 05:54:11,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:11,241 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 50 treesize of output 34 [2021-06-05 05:54:11,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:11,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:11,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:11,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:42 [2021-06-05 05:54:11,272 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 05:54:11,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:11,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:11,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:11,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:54:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:11,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487680141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:11,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:11,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:54:11,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117669507] [2021-06-05 05:54:11,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:54:11,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:54:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:54:11,327 INFO L87 Difference]: Start difference. First operand 6367 states and 23061 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:11,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:11,891 INFO L93 Difference]: Finished difference Result 7344 states and 26138 transitions. [2021-06-05 05:54:11,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:54:11,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:11,904 INFO L225 Difference]: With dead ends: 7344 [2021-06-05 05:54:11,905 INFO L226 Difference]: Without dead ends: 7270 [2021-06-05 05:54:11,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:54:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2021-06-05 05:54:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 6327. [2021-06-05 05:54:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6326 states have (on average 3.6296237748972495) internal successors, (22961), 6326 states have internal predecessors, (22961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 22961 transitions. [2021-06-05 05:54:12,001 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 22961 transitions. Word has length 30 [2021-06-05 05:54:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:12,001 INFO L482 AbstractCegarLoop]: Abstraction has 6327 states and 22961 transitions. [2021-06-05 05:54:12,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 22961 transitions. [2021-06-05 05:54:12,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:12,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:12,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:12,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 05:54:12,225 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:12,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1753454196, now seen corresponding path program 68 times [2021-06-05 05:54:12,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:12,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222209533] [2021-06-05 05:54:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:12,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:12,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222209533] [2021-06-05 05:54:12,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222209533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:12,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404185688] [2021-06-05 05:54:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:12,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:12,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:12,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:12,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:12,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:12,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:12,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:12,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:12,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:12,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:12,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:12,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:12,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:12,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:12,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:12,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:83, output treesize:60 [2021-06-05 05:54:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 05:54:12,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:12,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:12,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:12,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 05:54:12,583 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 05:54:12,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:12,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:12,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:12,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:54:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:12,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404185688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:12,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:12,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:54:12,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338035042] [2021-06-05 05:54:12,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:54:12,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:54:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:54:12,641 INFO L87 Difference]: Start difference. First operand 6327 states and 22961 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:13,151 INFO L93 Difference]: Finished difference Result 7803 states and 27440 transitions. [2021-06-05 05:54:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:54:13,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:13,165 INFO L225 Difference]: With dead ends: 7803 [2021-06-05 05:54:13,165 INFO L226 Difference]: Without dead ends: 7700 [2021-06-05 05:54:13,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:54:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2021-06-05 05:54:13,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 6339. [2021-06-05 05:54:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6339 states, 6338 states have (on average 3.6345850426001896) internal successors, (23036), 6338 states have internal predecessors, (23036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6339 states to 6339 states and 23036 transitions. [2021-06-05 05:54:13,291 INFO L78 Accepts]: Start accepts. Automaton has 6339 states and 23036 transitions. Word has length 30 [2021-06-05 05:54:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:13,291 INFO L482 AbstractCegarLoop]: Abstraction has 6339 states and 23036 transitions. [2021-06-05 05:54:13,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6339 states and 23036 transitions. [2021-06-05 05:54:13,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:13,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:13,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:13,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 05:54:13,501 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1666844150, now seen corresponding path program 69 times [2021-06-05 05:54:13,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:13,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746329327] [2021-06-05 05:54:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:13,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:13,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746329327] [2021-06-05 05:54:13,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746329327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:13,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191255379] [2021-06-05 05:54:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:13,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:13,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:54:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:13,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:54:13,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:13,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:13,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:13,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-05 05:54:13,748 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 05:54:13,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:54:13,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:13,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:13,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:13,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-06-05 05:54:13,863 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 05:54:13,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 41 [2021-06-05 05:54:13,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:13,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:13,884 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 05:54:13,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:123 [2021-06-05 05:54:14,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:14,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:14,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-06-05 05:54:14,083 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:54:14,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:14,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:14,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:27 [2021-06-05 05:54:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:14,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191255379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:14,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:14,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-06-05 05:54:14,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196284167] [2021-06-05 05:54:14,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:54:14,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:14,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:54:14,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:54:14,191 INFO L87 Difference]: Start difference. First operand 6339 states and 23036 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:15,520 INFO L93 Difference]: Finished difference Result 6740 states and 24150 transitions. [2021-06-05 05:54:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:54:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:15,532 INFO L225 Difference]: With dead ends: 6740 [2021-06-05 05:54:15,532 INFO L226 Difference]: Without dead ends: 6647 [2021-06-05 05:54:15,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 996.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6647 states. [2021-06-05 05:54:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6647 to 6393. [2021-06-05 05:54:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6392 states have (on average 3.6307884856070087) internal successors, (23208), 6392 states have internal predecessors, (23208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 23208 transitions. [2021-06-05 05:54:15,625 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 23208 transitions. Word has length 30 [2021-06-05 05:54:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:15,626 INFO L482 AbstractCegarLoop]: Abstraction has 6393 states and 23208 transitions. [2021-06-05 05:54:15,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 23 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 23208 transitions. [2021-06-05 05:54:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:15,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:15,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:15,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:15,836 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:15,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1213143856, now seen corresponding path program 70 times [2021-06-05 05:54:15,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:15,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072659053] [2021-06-05 05:54:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:15,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072659053] [2021-06-05 05:54:15,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072659053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:15,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847790690] [2021-06-05 05:54:15,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:15,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:15,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:15,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:16,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:16,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:16,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:16,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:16,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:16,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:54:16,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:16,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:16,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:16,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 05:54:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:16,131 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 23 [2021-06-05 05:54:16,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:16,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:16,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:16,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:30 [2021-06-05 05:54:16,214 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 20 treesize of output 12 [2021-06-05 05:54:16,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:16,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:16,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:16,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:54:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:16,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847790690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:16,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:16,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:54:16,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475925406] [2021-06-05 05:54:16,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:54:16,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:54:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:54:16,304 INFO L87 Difference]: Start difference. First operand 6393 states and 23208 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:16,710 INFO L93 Difference]: Finished difference Result 6914 states and 24810 transitions. [2021-06-05 05:54:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:54:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:16,722 INFO L225 Difference]: With dead ends: 6914 [2021-06-05 05:54:16,722 INFO L226 Difference]: Without dead ends: 6875 [2021-06-05 05:54:16,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:54:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6875 states. [2021-06-05 05:54:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6875 to 6435. [2021-06-05 05:54:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 3.630711843332297) internal successors, (23360), 6434 states have internal predecessors, (23360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 23360 transitions. [2021-06-05 05:54:16,814 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 23360 transitions. Word has length 30 [2021-06-05 05:54:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:16,815 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 23360 transitions. [2021-06-05 05:54:16,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 23360 transitions. [2021-06-05 05:54:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:16,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:16,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:17,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 05:54:17,029 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash -821172080, now seen corresponding path program 71 times [2021-06-05 05:54:17,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:17,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959820575] [2021-06-05 05:54:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:17,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:17,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959820575] [2021-06-05 05:54:17,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959820575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:17,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642248244] [2021-06-05 05:54:17,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:17,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:54:17,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:17,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:17,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:17,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:17,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:17,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:54:17,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:17,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:17,295 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 05:54:17,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:43 [2021-06-05 05:54:17,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:17,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 59 [2021-06-05 05:54:17,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:54:17,491 INFO L628 ElimStorePlain]: treesize reduction 84, result has 51.2 percent of original size [2021-06-05 05:54:17,505 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 05:54:17,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:40 [2021-06-05 05:54:17,701 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_2], 5=[A]} [2021-06-05 05:54:17,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-06-05 05:54:17,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:17,727 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.2 percent of original size [2021-06-05 05:54:17,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:17,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:17,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 12 [2021-06-05 05:54:17,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:17,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:17,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:54:17,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:20 [2021-06-05 05:54:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:17,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642248244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:17,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:17,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-06-05 05:54:17,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171205229] [2021-06-05 05:54:17,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:54:17,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:17,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:54:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:54:17,808 INFO L87 Difference]: Start difference. First operand 6435 states and 23360 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:19,879 INFO L93 Difference]: Finished difference Result 7742 states and 27559 transitions. [2021-06-05 05:54:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:54:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:19,893 INFO L225 Difference]: With dead ends: 7742 [2021-06-05 05:54:19,893 INFO L226 Difference]: Without dead ends: 7703 [2021-06-05 05:54:19,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1238.1ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:19,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7703 states. [2021-06-05 05:54:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7703 to 6439. [2021-06-05 05:54:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6439 states, 6438 states have (on average 3.630009319664492) internal successors, (23370), 6438 states have internal predecessors, (23370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6439 states to 6439 states and 23370 transitions. [2021-06-05 05:54:19,990 INFO L78 Accepts]: Start accepts. Automaton has 6439 states and 23370 transitions. Word has length 30 [2021-06-05 05:54:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:19,990 INFO L482 AbstractCegarLoop]: Abstraction has 6439 states and 23370 transitions. [2021-06-05 05:54:19,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6439 states and 23370 transitions. [2021-06-05 05:54:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:19,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:19,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:20,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:20,201 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1882522150, now seen corresponding path program 72 times [2021-06-05 05:54:20,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:20,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576655087] [2021-06-05 05:54:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:20,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:20,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576655087] [2021-06-05 05:54:20,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576655087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:20,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209729128] [2021-06-05 05:54:20,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:20,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:54:20,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:20,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:20,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:20,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:20,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:20,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:54:20,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:20,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 05:54:20,514 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 28 treesize of output 20 [2021-06-05 05:54:20,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:20,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:22 [2021-06-05 05:54:20,547 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 20 treesize of output 12 [2021-06-05 05:54:20,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:20,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:20,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:54:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:20,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209729128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:20,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:20,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:54:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693727211] [2021-06-05 05:54:20,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:54:20,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:54:20,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:54:20,601 INFO L87 Difference]: Start difference. First operand 6439 states and 23370 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:21,357 INFO L93 Difference]: Finished difference Result 7171 states and 25755 transitions. [2021-06-05 05:54:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:54:21,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:21,370 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 05:54:21,370 INFO L226 Difference]: Without dead ends: 7113 [2021-06-05 05:54:21,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:54:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-06-05 05:54:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 6451. [2021-06-05 05:54:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6451 states, 6450 states have (on average 3.6308527131782946) internal successors, (23419), 6450 states have internal predecessors, (23419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6451 states to 6451 states and 23419 transitions. [2021-06-05 05:54:21,463 INFO L78 Accepts]: Start accepts. Automaton has 6451 states and 23419 transitions. Word has length 30 [2021-06-05 05:54:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:21,463 INFO L482 AbstractCegarLoop]: Abstraction has 6451 states and 23419 transitions. [2021-06-05 05:54:21,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 6451 states and 23419 transitions. [2021-06-05 05:54:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:21,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:21,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:21,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 05:54:21,673 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1619848350, now seen corresponding path program 73 times [2021-06-05 05:54:21,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:21,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444965309] [2021-06-05 05:54:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:21,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:21,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444965309] [2021-06-05 05:54:21,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444965309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:21,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958468684] [2021-06-05 05:54:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:54:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:21,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:21,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:21,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:21,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:21,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:21,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:21,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:54:21,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:21,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:21,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:21,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 05:54:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:22,020 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 25 [2021-06-05 05:54:22,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:22,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:22,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:22,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:32 [2021-06-05 05:54:22,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 05:54:22,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:22,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:22,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:22,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-06-05 05:54:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:22,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958468684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:22,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:22,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 05:54:22,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920600105] [2021-06-05 05:54:22,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:54:22,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:22,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:54:22,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:54:22,102 INFO L87 Difference]: Start difference. First operand 6451 states and 23419 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:22,724 INFO L93 Difference]: Finished difference Result 7289 states and 26137 transitions. [2021-06-05 05:54:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:54:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:22,737 INFO L225 Difference]: With dead ends: 7289 [2021-06-05 05:54:22,737 INFO L226 Difference]: Without dead ends: 7256 [2021-06-05 05:54:22,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:54:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7256 states. [2021-06-05 05:54:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7256 to 6431. [2021-06-05 05:54:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 6430 states have (on average 3.636702954898911) internal successors, (23384), 6430 states have internal predecessors, (23384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 23384 transitions. [2021-06-05 05:54:22,832 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 23384 transitions. Word has length 30 [2021-06-05 05:54:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:22,832 INFO L482 AbstractCegarLoop]: Abstraction has 6431 states and 23384 transitions. [2021-06-05 05:54:22,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 23384 transitions. [2021-06-05 05:54:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:22,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:22,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:23,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:23,042 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1131466028, now seen corresponding path program 74 times [2021-06-05 05:54:23,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:23,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697766972] [2021-06-05 05:54:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:23,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697766972] [2021-06-05 05:54:23,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697766972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561451477] [2021-06-05 05:54:23,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:23,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:23,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:23,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:23,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:23,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:23,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:23,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:23,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 05:54:23,363 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 27 [2021-06-05 05:54:23,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:23,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-06-05 05:54:23,405 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 18 [2021-06-05 05:54:23,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:23,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 05:54:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:23,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561451477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:23,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:23,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:54:23,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135257500] [2021-06-05 05:54:23,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:54:23,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:23,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:54:23,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:54:23,465 INFO L87 Difference]: Start difference. First operand 6431 states and 23384 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:24,319 INFO L93 Difference]: Finished difference Result 7361 states and 26202 transitions. [2021-06-05 05:54:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:54:24,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:24,333 INFO L225 Difference]: With dead ends: 7361 [2021-06-05 05:54:24,333 INFO L226 Difference]: Without dead ends: 7274 [2021-06-05 05:54:24,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:54:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-06-05 05:54:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6635. [2021-06-05 05:54:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 3.6323485076876696) internal successors, (24097), 6634 states have internal predecessors, (24097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 24097 transitions. [2021-06-05 05:54:24,436 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 24097 transitions. Word has length 30 [2021-06-05 05:54:24,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:24,436 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 24097 transitions. [2021-06-05 05:54:24,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 24097 transitions. [2021-06-05 05:54:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:24,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:24,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:24,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:24,651 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:24,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:24,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1924062824, now seen corresponding path program 75 times [2021-06-05 05:54:24,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:24,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050804372] [2021-06-05 05:54:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:24,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:24,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050804372] [2021-06-05 05:54:24,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050804372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982505934] [2021-06-05 05:54:24,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:54:24,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:24,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:24,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:54:24,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:24,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:54:24,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:24,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:24,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:24,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:54:24,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:24,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:24,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:24,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:24,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:24,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:24,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:49 [2021-06-05 05:54:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:24,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:24,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 52 [2021-06-05 05:54:24,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:54:25,036 INFO L628 ElimStorePlain]: treesize reduction 15, result has 88.5 percent of original size [2021-06-05 05:54:25,042 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 05:54:25,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:161 [2021-06-05 05:54:25,117 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 24 [2021-06-05 05:54:25,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:25,121 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 05:54:25,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:25,125 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 9 treesize of output 5 [2021-06-05 05:54:25,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:25,127 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 9 treesize of output 5 [2021-06-05 05:54:25,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:25,171 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.2 percent of original size [2021-06-05 05:54:25,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:54:25,172 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:133, output treesize:60 [2021-06-05 05:54:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:25,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982505934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:25,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:25,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 05:54:25,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687637434] [2021-06-05 05:54:25,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:54:25,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:25,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:54:25,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:54:25,330 INFO L87 Difference]: Start difference. First operand 6635 states and 24097 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:26,480 INFO L93 Difference]: Finished difference Result 8103 states and 28705 transitions. [2021-06-05 05:54:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:54:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:26,495 INFO L225 Difference]: With dead ends: 8103 [2021-06-05 05:54:26,495 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 05:54:26,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:54:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 05:54:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6705. [2021-06-05 05:54:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6705 states, 6704 states have (on average 3.6302207637231505) internal successors, (24337), 6704 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6705 states to 6705 states and 24337 transitions. [2021-06-05 05:54:26,597 INFO L78 Accepts]: Start accepts. Automaton has 6705 states and 24337 transitions. Word has length 30 [2021-06-05 05:54:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:26,597 INFO L482 AbstractCegarLoop]: Abstraction has 6705 states and 24337 transitions. [2021-06-05 05:54:26,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6705 states and 24337 transitions. [2021-06-05 05:54:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:26,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:26,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:26,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:26,808 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:26,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1286200074, now seen corresponding path program 76 times [2021-06-05 05:54:26,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:26,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119435151] [2021-06-05 05:54:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:26,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:26,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119435151] [2021-06-05 05:54:26,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119435151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:26,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324835596] [2021-06-05 05:54:26,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:26,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:26,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:26,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:26,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:54:26,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:26,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:26,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:26,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 05:54:27,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:27,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:27,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:27,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:27,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:27,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:27,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 05:54:27,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:27,170 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 47 treesize of output 31 [2021-06-05 05:54:27,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:27,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:27,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:27,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 05:54:27,208 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 18 [2021-06-05 05:54:27,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:27,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:27,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:27,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 05:54:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:27,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324835596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:27,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:27,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 05:54:27,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794981215] [2021-06-05 05:54:27,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:54:27,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:54:27,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:54:27,247 INFO L87 Difference]: Start difference. First operand 6705 states and 24337 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:27,928 INFO L93 Difference]: Finished difference Result 6847 states and 24689 transitions. [2021-06-05 05:54:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:54:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:27,940 INFO L225 Difference]: With dead ends: 6847 [2021-06-05 05:54:27,940 INFO L226 Difference]: Without dead ends: 6832 [2021-06-05 05:54:27,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:54:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-06-05 05:54:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6705. [2021-06-05 05:54:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6705 states, 6704 states have (on average 3.6302207637231505) internal successors, (24337), 6704 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6705 states to 6705 states and 24337 transitions. [2021-06-05 05:54:28,058 INFO L78 Accepts]: Start accepts. Automaton has 6705 states and 24337 transitions. Word has length 30 [2021-06-05 05:54:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:28,058 INFO L482 AbstractCegarLoop]: Abstraction has 6705 states and 24337 transitions. [2021-06-05 05:54:28,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 6705 states and 24337 transitions. [2021-06-05 05:54:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:28,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:28,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:28,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 05:54:28,269 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1143052268, now seen corresponding path program 77 times [2021-06-05 05:54:28,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:28,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460291128] [2021-06-05 05:54:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:28,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:28,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460291128] [2021-06-05 05:54:28,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460291128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:28,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503652299] [2021-06-05 05:54:28,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:28,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:28,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:28,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:54:28,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:28,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:28,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:28,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:28,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:28,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:28,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:28,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:28,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:54 [2021-06-05 05:54:28,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:28,572 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 44 treesize of output 30 [2021-06-05 05:54:28,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:28,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:45 [2021-06-05 05:54:28,659 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 05:54:28,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:28,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:17 [2021-06-05 05:54:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:28,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503652299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:28,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:28,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:54:28,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678846215] [2021-06-05 05:54:28,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:54:28,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:28,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:54:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:54:28,719 INFO L87 Difference]: Start difference. First operand 6705 states and 24337 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:29,261 INFO L93 Difference]: Finished difference Result 7749 states and 27582 transitions. [2021-06-05 05:54:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:54:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:29,273 INFO L225 Difference]: With dead ends: 7749 [2021-06-05 05:54:29,274 INFO L226 Difference]: Without dead ends: 7683 [2021-06-05 05:54:29,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:54:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7683 states. [2021-06-05 05:54:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7683 to 6717. [2021-06-05 05:54:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 6716 states have (on average 3.631923764145325) internal successors, (24392), 6716 states have internal predecessors, (24392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 24392 transitions. [2021-06-05 05:54:29,366 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 24392 transitions. Word has length 30 [2021-06-05 05:54:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:29,366 INFO L482 AbstractCegarLoop]: Abstraction has 6717 states and 24392 transitions. [2021-06-05 05:54:29,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 24392 transitions. [2021-06-05 05:54:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:54:29,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:29,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:29,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:29,576 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:29,576 INFO L82 PathProgramCache]: Analyzing trace with hash -593298096, now seen corresponding path program 78 times [2021-06-05 05:54:29,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:29,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460494251] [2021-06-05 05:54:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:29,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460494251] [2021-06-05 05:54:29,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460494251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249000037] [2021-06-05 05:54:29,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:54:29,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:54:29,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:54:29,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:29,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:29,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:29,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:29,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:29,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:54:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:29,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:29,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:54:29,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:29,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:29,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:29,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:49 [2021-06-05 05:54:29,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:29,918 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 47 treesize of output 31 [2021-06-05 05:54:29,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:29,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:29,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:29,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:47 [2021-06-05 05:54:29,959 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 18 [2021-06-05 05:54:29,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:29,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:29,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:29,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 05:54:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:30,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249000037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:30,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:30,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:54:30,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667941061] [2021-06-05 05:54:30,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:54:30,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:30,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:54:30,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:54:30,023 INFO L87 Difference]: Start difference. First operand 6717 states and 24392 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:30,924 INFO L93 Difference]: Finished difference Result 7532 states and 26962 transitions. [2021-06-05 05:54:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:54:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:54:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:30,937 INFO L225 Difference]: With dead ends: 7532 [2021-06-05 05:54:30,937 INFO L226 Difference]: Without dead ends: 7487 [2021-06-05 05:54:30,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:54:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2021-06-05 05:54:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 6569. [2021-06-05 05:54:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 3.6385505481120584) internal successors, (23898), 6568 states have internal predecessors, (23898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 23898 transitions. [2021-06-05 05:54:31,032 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 23898 transitions. Word has length 30 [2021-06-05 05:54:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:31,032 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 23898 transitions. [2021-06-05 05:54:31,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:31,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 23898 transitions. [2021-06-05 05:54:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:31,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:31,041 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:31,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:31,242 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 395652262, now seen corresponding path program 79 times [2021-06-05 05:54:31,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:31,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080020359] [2021-06-05 05:54:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:31,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:31,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080020359] [2021-06-05 05:54:31,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080020359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:31,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626641019] [2021-06-05 05:54:31,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:54:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:31,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626641019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:31,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:31,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 05:54:31,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700491943] [2021-06-05 05:54:31,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:54:31,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:54:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:54:31,332 INFO L87 Difference]: Start difference. First operand 6569 states and 23898 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:31,485 INFO L93 Difference]: Finished difference Result 11102 states and 39754 transitions. [2021-06-05 05:54:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:54:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:54:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:31,505 INFO L225 Difference]: With dead ends: 11102 [2021-06-05 05:54:31,505 INFO L226 Difference]: Without dead ends: 11102 [2021-06-05 05:54:31,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:54:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11102 states. [2021-06-05 05:54:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11102 to 6724. [2021-06-05 05:54:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 3.66517923546036) internal successors, (24641), 6723 states have internal predecessors, (24641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 24641 transitions. [2021-06-05 05:54:31,623 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 24641 transitions. Word has length 32 [2021-06-05 05:54:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:31,624 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 24641 transitions. [2021-06-05 05:54:31,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 24641 transitions. [2021-06-05 05:54:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:31,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:31,633 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:31,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:31,834 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1898467678, now seen corresponding path program 80 times [2021-06-05 05:54:31,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:31,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201501529] [2021-06-05 05:54:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:54:31,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:31,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201501529] [2021-06-05 05:54:31,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201501529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:31,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851052939] [2021-06-05 05:54:31,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:31,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:31,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:31,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:54:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:31,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851052939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:31,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:31,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 05:54:31,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276419601] [2021-06-05 05:54:31,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:54:31,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:54:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:54:31,941 INFO L87 Difference]: Start difference. First operand 6724 states and 24641 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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 05:54:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:32,571 INFO L93 Difference]: Finished difference Result 16532 states and 58007 transitions. [2021-06-05 05:54:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:54:32,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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 32 [2021-06-05 05:54:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:32,601 INFO L225 Difference]: With dead ends: 16532 [2021-06-05 05:54:32,601 INFO L226 Difference]: Without dead ends: 16408 [2021-06-05 05:54:32,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1582, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:54:32,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16408 states. [2021-06-05 05:54:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16408 to 8510. [2021-06-05 05:54:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8510 states, 8509 states have (on average 3.6823363497473265) internal successors, (31333), 8509 states have internal predecessors, (31333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 31333 transitions. [2021-06-05 05:54:32,765 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 31333 transitions. Word has length 32 [2021-06-05 05:54:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:32,765 INFO L482 AbstractCegarLoop]: Abstraction has 8510 states and 31333 transitions. [2021-06-05 05:54:32,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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 05:54:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 31333 transitions. [2021-06-05 05:54:32,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:32,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:32,777 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:32,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:32,978 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:32,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2057537456, now seen corresponding path program 81 times [2021-06-05 05:54:32,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:32,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012499203] [2021-06-05 05:54:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:32,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:32,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012499203] [2021-06-05 05:54:32,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012499203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:32,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717818934] [2021-06-05 05:54:32,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:33,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:54:33,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:33,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:54:33,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:33,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717818934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:33,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:33,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:54:33,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279197245] [2021-06-05 05:54:33,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:54:33,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:33,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:54:33,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:54:33,085 INFO L87 Difference]: Start difference. First operand 8510 states and 31333 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:33,991 INFO L93 Difference]: Finished difference Result 20781 states and 72355 transitions. [2021-06-05 05:54:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:54:33,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:54:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:34,027 INFO L225 Difference]: With dead ends: 20781 [2021-06-05 05:54:34,027 INFO L226 Difference]: Without dead ends: 20533 [2021-06-05 05:54:34,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 414.2ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:54:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20533 states. [2021-06-05 05:54:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20533 to 11322. [2021-06-05 05:54:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 3.7398639696139915) internal successors, (42339), 11321 states have internal predecessors, (42339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 42339 transitions. [2021-06-05 05:54:34,260 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 42339 transitions. Word has length 32 [2021-06-05 05:54:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:34,261 INFO L482 AbstractCegarLoop]: Abstraction has 11322 states and 42339 transitions. [2021-06-05 05:54:34,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 42339 transitions. [2021-06-05 05:54:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:34,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:34,276 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:34,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 05:54:34,476 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash 64495996, now seen corresponding path program 82 times [2021-06-05 05:54:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:34,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937817953] [2021-06-05 05:54:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:34,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:34,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937817953] [2021-06-05 05:54:34,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937817953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388055977] [2021-06-05 05:54:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:34,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:34,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:34,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:54:34,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:34,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388055977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:34,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:34,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 05:54:34,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785819265] [2021-06-05 05:54:34,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:54:34,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:34,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:54:34,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:54:34,581 INFO L87 Difference]: Start difference. First operand 11322 states and 42339 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:35,565 INFO L93 Difference]: Finished difference Result 34302 states and 118976 transitions. [2021-06-05 05:54:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:54:35,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:54:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:35,636 INFO L225 Difference]: With dead ends: 34302 [2021-06-05 05:54:35,636 INFO L226 Difference]: Without dead ends: 34031 [2021-06-05 05:54:35,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=1052, Invalid=3108, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:54:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34031 states. [2021-06-05 05:54:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34031 to 18468. [2021-06-05 05:54:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18468 states, 18467 states have (on average 3.7362321979747657) internal successors, (68997), 18467 states have internal predecessors, (68997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18468 states to 18468 states and 68997 transitions. [2021-06-05 05:54:36,058 INFO L78 Accepts]: Start accepts. Automaton has 18468 states and 68997 transitions. Word has length 32 [2021-06-05 05:54:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:36,059 INFO L482 AbstractCegarLoop]: Abstraction has 18468 states and 68997 transitions. [2021-06-05 05:54:36,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 18468 states and 68997 transitions. [2021-06-05 05:54:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:36,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:36,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:36,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 05:54:36,286 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:36,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1359569624, now seen corresponding path program 83 times [2021-06-05 05:54:36,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:36,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226877367] [2021-06-05 05:54:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:36,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:36,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226877367] [2021-06-05 05:54:36,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226877367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:36,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261814850] [2021-06-05 05:54:36,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:36,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:54:36,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:36,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:54:36,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:36,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261814850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:36,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:36,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10 [2021-06-05 05:54:36,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599189913] [2021-06-05 05:54:36,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:54:36,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:54:36,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:54:36,390 INFO L87 Difference]: Start difference. First operand 18468 states and 68997 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 05:54:37,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:37,022 INFO L93 Difference]: Finished difference Result 46514 states and 167385 transitions. [2021-06-05 05:54:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:54:37,022 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 32 [2021-06-05 05:54:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:37,137 INFO L225 Difference]: With dead ends: 46514 [2021-06-05 05:54:37,137 INFO L226 Difference]: Without dead ends: 46280 [2021-06-05 05:54:37,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46280 states. [2021-06-05 05:54:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46280 to 35803. [2021-06-05 05:54:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35803 states, 35802 states have (on average 3.786240992123345) internal successors, (135555), 35802 states have internal predecessors, (135555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35803 states to 35803 states and 135555 transitions. [2021-06-05 05:54:38,070 INFO L78 Accepts]: Start accepts. Automaton has 35803 states and 135555 transitions. Word has length 32 [2021-06-05 05:54:38,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:38,070 INFO L482 AbstractCegarLoop]: Abstraction has 35803 states and 135555 transitions. [2021-06-05 05:54:38,070 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 05:54:38,070 INFO L276 IsEmpty]: Start isEmpty. Operand 35803 states and 135555 transitions. [2021-06-05 05:54:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:38,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:38,116 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:38,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 05:54:38,333 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash 644380696, now seen corresponding path program 84 times [2021-06-05 05:54:38,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:38,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770379097] [2021-06-05 05:54:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:38,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:38,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770379097] [2021-06-05 05:54:38,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770379097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:38,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172143605] [2021-06-05 05:54:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:38,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:54:38,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:54:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:38,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172143605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:38,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:38,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:54:38,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976100893] [2021-06-05 05:54:38,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:54:38,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:38,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:54:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:54:38,436 INFO L87 Difference]: Start difference. First operand 35803 states and 135555 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:40,217 INFO L93 Difference]: Finished difference Result 88369 states and 318216 transitions. [2021-06-05 05:54:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:54:40,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:54:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:40,504 INFO L225 Difference]: With dead ends: 88369 [2021-06-05 05:54:40,504 INFO L226 Difference]: Without dead ends: 88320 [2021-06-05 05:54:40,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 874.3ms TimeCoverageRelationStatistics Valid=1091, Invalid=4609, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:54:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88320 states. [2021-06-05 05:54:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88320 to 62379. [2021-06-05 05:54:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62379 states, 62378 states have (on average 3.8003462759306164) internal successors, (237058), 62378 states have internal predecessors, (237058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62379 states to 62379 states and 237058 transitions. [2021-06-05 05:54:42,310 INFO L78 Accepts]: Start accepts. Automaton has 62379 states and 237058 transitions. Word has length 32 [2021-06-05 05:54:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:42,310 INFO L482 AbstractCegarLoop]: Abstraction has 62379 states and 237058 transitions. [2021-06-05 05:54:42,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 62379 states and 237058 transitions. [2021-06-05 05:54:42,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:42,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:42,375 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:42,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 05:54:42,591 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:42,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1512147096, now seen corresponding path program 85 times [2021-06-05 05:54:42,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:42,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447968741] [2021-06-05 05:54:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:42,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:42,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447968741] [2021-06-05 05:54:42,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447968741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:42,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110757865] [2021-06-05 05:54:42,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:42,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:54:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:42,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110757865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:42,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:42,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:54:42,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427591636] [2021-06-05 05:54:42,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:54:42,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:42,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:54:42,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:54:42,682 INFO L87 Difference]: Start difference. First operand 62379 states and 237058 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 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 05:54:44,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:44,030 INFO L93 Difference]: Finished difference Result 108485 states and 398658 transitions. [2021-06-05 05:54:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:54:44,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 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 32 [2021-06-05 05:54:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:44,362 INFO L225 Difference]: With dead ends: 108485 [2021-06-05 05:54:44,362 INFO L226 Difference]: Without dead ends: 108345 [2021-06-05 05:54:44,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=455, Invalid=1437, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:54:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108345 states. [2021-06-05 05:54:45,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108345 to 66321. [2021-06-05 05:54:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66321 states, 66320 states have (on average 3.801809408926417) internal successors, (252136), 66320 states have internal predecessors, (252136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66321 states to 66321 states and 252136 transitions. [2021-06-05 05:54:46,349 INFO L78 Accepts]: Start accepts. Automaton has 66321 states and 252136 transitions. Word has length 32 [2021-06-05 05:54:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:46,349 INFO L482 AbstractCegarLoop]: Abstraction has 66321 states and 252136 transitions. [2021-06-05 05:54:46,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 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 05:54:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 66321 states and 252136 transitions. [2021-06-05 05:54:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:46,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:46,419 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:46,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 05:54:46,620 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash -488341172, now seen corresponding path program 86 times [2021-06-05 05:54:46,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:46,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527852167] [2021-06-05 05:54:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:46,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:46,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527852167] [2021-06-05 05:54:46,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527852167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:46,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191301605] [2021-06-05 05:54:46,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:46,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:46,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:46,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:54:46,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:46,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191301605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:46,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:46,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-06-05 05:54:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469041915] [2021-06-05 05:54:46,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:54:46,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:46,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:54:46,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:54:46,757 INFO L87 Difference]: Start difference. First operand 66321 states and 252136 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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 05:54:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:48,560 INFO L93 Difference]: Finished difference Result 119338 states and 429533 transitions. [2021-06-05 05:54:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:54:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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 32 [2021-06-05 05:54:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:48,907 INFO L225 Difference]: With dead ends: 119338 [2021-06-05 05:54:48,908 INFO L226 Difference]: Without dead ends: 119149 [2021-06-05 05:54:48,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 693.0ms TimeCoverageRelationStatistics Valid=1390, Invalid=4160, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:54:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119149 states. [2021-06-05 05:54:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119149 to 57377. [2021-06-05 05:54:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57377 states, 57376 states have (on average 3.772936419408812) internal successors, (216476), 57376 states have internal predecessors, (216476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57377 states to 57377 states and 216476 transitions. [2021-06-05 05:54:50,955 INFO L78 Accepts]: Start accepts. Automaton has 57377 states and 216476 transitions. Word has length 32 [2021-06-05 05:54:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:50,955 INFO L482 AbstractCegarLoop]: Abstraction has 57377 states and 216476 transitions. [2021-06-05 05:54:50,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 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 05:54:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 57377 states and 216476 transitions. [2021-06-05 05:54:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:51,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:51,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:51,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:51,229 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1222826244, now seen corresponding path program 87 times [2021-06-05 05:54:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:51,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111234721] [2021-06-05 05:54:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:51,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:51,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111234721] [2021-06-05 05:54:51,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111234721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:51,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586779267] [2021-06-05 05:54:51,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:54:51,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:51,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:51,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:54:51,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:51,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:54:51,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:51,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:51,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:51,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 05:54:51,465 INFO L446 ElimStorePlain]: Different costs {3=[v_C_149], 5=[A]} [2021-06-05 05:54:51,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:51,481 INFO L354 Elim1Store]: treesize reduction 25, result has 26.5 percent of original size [2021-06-05 05:54:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 38 [2021-06-05 05:54:51,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:51,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:51,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:51,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2021-06-05 05:54:51,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 05:54:51,569 INFO L628 ElimStorePlain]: treesize reduction 90, result has 33.3 percent of original size [2021-06-05 05:54:51,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 05:54:51,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:55, output treesize:45 [2021-06-05 05:54:51,740 INFO L446 ElimStorePlain]: Different costs {1=[C], 6=[v_prenex_3]} [2021-06-05 05:54:51,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:51,748 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 05:54:51,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:54:51,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:51,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:51,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:51,812 INFO L354 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 05:54:51,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 32 [2021-06-05 05:54:51,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 05:54:51,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:51,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:54:51,867 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:86, output treesize:151 [2021-06-05 05:54:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:54:52,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586779267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:52,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:52,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 21 [2021-06-05 05:54:52,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125969270] [2021-06-05 05:54:52,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:54:52,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:54:52,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:54:52,161 INFO L87 Difference]: Start difference. First operand 57377 states and 216476 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:53,303 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 16 [2021-06-05 05:54:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:56,053 INFO L93 Difference]: Finished difference Result 124474 states and 464024 transitions. [2021-06-05 05:54:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:54:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:54:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:56,442 INFO L225 Difference]: With dead ends: 124474 [2021-06-05 05:54:56,443 INFO L226 Difference]: Without dead ends: 124408 [2021-06-05 05:54:56,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2477.2ms TimeCoverageRelationStatistics Valid=664, Invalid=3368, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:54:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124408 states. [2021-06-05 05:54:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124408 to 98412. [2021-06-05 05:54:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98412 states, 98411 states have (on average 3.8090152523600005) internal successors, (374849), 98411 states have internal predecessors, (374849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98412 states to 98412 states and 374849 transitions. [2021-06-05 05:54:59,470 INFO L78 Accepts]: Start accepts. Automaton has 98412 states and 374849 transitions. Word has length 32 [2021-06-05 05:54:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:59,470 INFO L482 AbstractCegarLoop]: Abstraction has 98412 states and 374849 transitions. [2021-06-05 05:54:59,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:59,470 INFO L276 IsEmpty]: Start isEmpty. Operand 98412 states and 374849 transitions. [2021-06-05 05:54:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:54:59,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:59,560 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:59,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:59,760 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2035987310, now seen corresponding path program 88 times [2021-06-05 05:54:59,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:59,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592441720] [2021-06-05 05:54:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:59,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:59,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592441720] [2021-06-05 05:54:59,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592441720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:59,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610225327] [2021-06-05 05:54:59,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:59,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:54:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:54:59,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610225327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:59,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:59,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 05:54:59,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980772374] [2021-06-05 05:54:59,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:54:59,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:59,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:54:59,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:54:59,864 INFO L87 Difference]: Start difference. First operand 98412 states and 374849 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 05:55:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:01,063 INFO L93 Difference]: Finished difference Result 123934 states and 465312 transitions. [2021-06-05 05:55:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:55:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 32 [2021-06-05 05:55:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:01,482 INFO L225 Difference]: With dead ends: 123934 [2021-06-05 05:55:01,482 INFO L226 Difference]: Without dead ends: 123902 [2021-06-05 05:55:01,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:55:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123902 states. [2021-06-05 05:55:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123902 to 86419. [2021-06-05 05:55:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86419 states, 86418 states have (on average 3.807968247355875) internal successors, (329077), 86418 states have internal predecessors, (329077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86419 states to 86419 states and 329077 transitions. [2021-06-05 05:55:03,936 INFO L78 Accepts]: Start accepts. Automaton has 86419 states and 329077 transitions. Word has length 32 [2021-06-05 05:55:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:03,936 INFO L482 AbstractCegarLoop]: Abstraction has 86419 states and 329077 transitions. [2021-06-05 05:55:03,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 05:55:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 86419 states and 329077 transitions. [2021-06-05 05:55:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:55:04,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:04,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:04,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:04,229 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1575283700, now seen corresponding path program 89 times [2021-06-05 05:55:04,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:04,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960214709] [2021-06-05 05:55:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:04,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:04,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960214709] [2021-06-05 05:55:04,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960214709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:04,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327209540] [2021-06-05 05:55:04,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:04,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:55:04,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:04,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:55:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:04,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327209540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:04,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:04,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-06-05 05:55:04,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836776248] [2021-06-05 05:55:04,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:55:04,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:55:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:55:04,335 INFO L87 Difference]: Start difference. First operand 86419 states and 329077 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:05,712 INFO L93 Difference]: Finished difference Result 100765 states and 379519 transitions. [2021-06-05 05:55:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:55:05,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:55:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:06,081 INFO L225 Difference]: With dead ends: 100765 [2021-06-05 05:55:06,081 INFO L226 Difference]: Without dead ends: 100765 [2021-06-05 05:55:06,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:55:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100765 states. [2021-06-05 05:55:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100765 to 87208. [2021-06-05 05:55:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87208 states, 87207 states have (on average 3.801311821298749) internal successors, (331501), 87207 states have internal predecessors, (331501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87208 states to 87208 states and 331501 transitions. [2021-06-05 05:55:08,480 INFO L78 Accepts]: Start accepts. Automaton has 87208 states and 331501 transitions. Word has length 32 [2021-06-05 05:55:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:08,480 INFO L482 AbstractCegarLoop]: Abstraction has 87208 states and 331501 transitions. [2021-06-05 05:55:08,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 87208 states and 331501 transitions. [2021-06-05 05:55:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:55:08,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:08,558 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:08,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-06-05 05:55:08,763 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1114060564, now seen corresponding path program 90 times [2021-06-05 05:55:08,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:08,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598737115] [2021-06-05 05:55:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:08,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:08,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598737115] [2021-06-05 05:55:08,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598737115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:08,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731451855] [2021-06-05 05:55:08,790 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 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 05:55:08,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:55:08,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:55:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:55:08,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731451855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:08,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:08,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 05:55:08,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126982044] [2021-06-05 05:55:08,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:55:08,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:08,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:55:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:55:08,886 INFO L87 Difference]: Start difference. First operand 87208 states and 331501 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:10,793 INFO L93 Difference]: Finished difference Result 145992 states and 544191 transitions. [2021-06-05 05:55:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:55:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:55:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:11,641 INFO L225 Difference]: With dead ends: 145992 [2021-06-05 05:55:11,642 INFO L226 Difference]: Without dead ends: 145292 [2021-06-05 05:55:11,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 513.8ms TimeCoverageRelationStatistics Valid=849, Invalid=3441, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:55:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145292 states. [2021-06-05 05:55:13,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145292 to 94868. [2021-06-05 05:55:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94868 states, 94867 states have (on average 3.8163323389587527) internal successors, (362044), 94867 states have internal predecessors, (362044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94868 states to 94868 states and 362044 transitions. [2021-06-05 05:55:14,420 INFO L78 Accepts]: Start accepts. Automaton has 94868 states and 362044 transitions. Word has length 32 [2021-06-05 05:55:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:14,420 INFO L482 AbstractCegarLoop]: Abstraction has 94868 states and 362044 transitions. [2021-06-05 05:55:14,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:14,420 INFO L276 IsEmpty]: Start isEmpty. Operand 94868 states and 362044 transitions. [2021-06-05 05:55:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:55:14,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:14,528 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:14,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:14,735 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:14,735 INFO L82 PathProgramCache]: Analyzing trace with hash 310314462, now seen corresponding path program 91 times [2021-06-05 05:55:14,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:14,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842163279] [2021-06-05 05:55:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:14,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:14,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842163279] [2021-06-05 05:55:14,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842163279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:14,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040934932] [2021-06-05 05:55:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:55:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:14,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040934932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:14,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:14,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 05:55:14,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086155153] [2021-06-05 05:55:14,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:55:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:14,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:55:14,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:55:14,830 INFO L87 Difference]: Start difference. First operand 94868 states and 362044 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:16,165 INFO L93 Difference]: Finished difference Result 147209 states and 562251 transitions. [2021-06-05 05:55:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:55:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:55:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:16,678 INFO L225 Difference]: With dead ends: 147209 [2021-06-05 05:55:16,679 INFO L226 Difference]: Without dead ends: 145919 [2021-06-05 05:55:16,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:55:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145919 states. [2021-06-05 05:55:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145919 to 142860. [2021-06-05 05:55:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142860 states, 142859 states have (on average 3.757474152836013) internal successors, (536789), 142859 states have internal predecessors, (536789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142860 states to 142860 states and 536789 transitions. [2021-06-05 05:55:20,728 INFO L78 Accepts]: Start accepts. Automaton has 142860 states and 536789 transitions. Word has length 33 [2021-06-05 05:55:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:20,728 INFO L482 AbstractCegarLoop]: Abstraction has 142860 states and 536789 transitions. [2021-06-05 05:55:20,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 142860 states and 536789 transitions. [2021-06-05 05:55:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:55:20,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:20,868 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:21,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 05:55:21,068 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash 388582514, now seen corresponding path program 92 times [2021-06-05 05:55:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:21,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116334927] [2021-06-05 05:55:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:21,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:21,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116334927] [2021-06-05 05:55:21,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116334927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:21,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571694191] [2021-06-05 05:55:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:21,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:21,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:21,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:55:21,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:21,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571694191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:21,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:21,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:55:21,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100099369] [2021-06-05 05:55:21,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:55:21,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:21,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:55:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:55:21,157 INFO L87 Difference]: Start difference. First operand 142860 states and 536789 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:22,487 INFO L93 Difference]: Finished difference Result 146910 states and 548418 transitions. [2021-06-05 05:55:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:55:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:55:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:22,984 INFO L225 Difference]: With dead ends: 146910 [2021-06-05 05:55:22,984 INFO L226 Difference]: Without dead ends: 146830 [2021-06-05 05:55:22,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:55:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146830 states. [2021-06-05 05:55:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146830 to 122252. [2021-06-05 05:55:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122252 states, 122251 states have (on average 3.763003983607496) internal successors, (460031), 122251 states have internal predecessors, (460031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122252 states to 122252 states and 460031 transitions. [2021-06-05 05:55:26,813 INFO L78 Accepts]: Start accepts. Automaton has 122252 states and 460031 transitions. Word has length 33 [2021-06-05 05:55:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:26,813 INFO L482 AbstractCegarLoop]: Abstraction has 122252 states and 460031 transitions. [2021-06-05 05:55:26,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 122252 states and 460031 transitions. [2021-06-05 05:55:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:55:26,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:26,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:27,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 05:55:27,156 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash 58068616, now seen corresponding path program 93 times [2021-06-05 05:55:27,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:27,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715591320] [2021-06-05 05:55:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:27,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715591320] [2021-06-05 05:55:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715591320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626024006] [2021-06-05 05:55:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:27,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:55:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:55:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:27,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626024006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:27,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:27,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-05 05:55:27,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252608814] [2021-06-05 05:55:27,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:55:27,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:55:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:55:27,292 INFO L87 Difference]: Start difference. First operand 122252 states and 460031 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:28,870 INFO L93 Difference]: Finished difference Result 165358 states and 606680 transitions. [2021-06-05 05:55:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:55:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:55:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:29,346 INFO L225 Difference]: With dead ends: 165358 [2021-06-05 05:55:29,346 INFO L226 Difference]: Without dead ends: 164920 [2021-06-05 05:55:29,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=262, Invalid=730, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:55:29,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164920 states. [2021-06-05 05:55:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164920 to 137687. [2021-06-05 05:55:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137687 states, 137686 states have (on average 3.7301831704022197) internal successors, (513594), 137686 states have internal predecessors, (513594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137687 states to 137687 states and 513594 transitions. [2021-06-05 05:55:33,321 INFO L78 Accepts]: Start accepts. Automaton has 137687 states and 513594 transitions. Word has length 33 [2021-06-05 05:55:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:33,321 INFO L482 AbstractCegarLoop]: Abstraction has 137687 states and 513594 transitions. [2021-06-05 05:55:33,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 137687 states and 513594 transitions. [2021-06-05 05:55:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:55:33,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:33,448 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:33,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 05:55:33,659 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash -125858070, now seen corresponding path program 94 times [2021-06-05 05:55:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:33,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405860182] [2021-06-05 05:55:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:33,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405860182] [2021-06-05 05:55:33,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405860182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:33,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537237578] [2021-06-05 05:55:33,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:33,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:33,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:33,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:55:33,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:55:33,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537237578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:33,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:33,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:55:33,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758157442] [2021-06-05 05:55:33,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:55:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:55:33,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:55:33,739 INFO L87 Difference]: Start difference. First operand 137687 states and 513594 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:34,987 INFO L93 Difference]: Finished difference Result 140839 states and 522801 transitions. [2021-06-05 05:55:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:55:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:55:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:35,456 INFO L225 Difference]: With dead ends: 140839 [2021-06-05 05:55:35,456 INFO L226 Difference]: Without dead ends: 140726 [2021-06-05 05:55:35,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:55:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140726 states. [2021-06-05 05:55:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140726 to 130600. [2021-06-05 05:55:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130600 states, 130599 states have (on average 3.7374099342261426) internal successors, (488102), 130599 states have internal predecessors, (488102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130600 states to 130600 states and 488102 transitions. [2021-06-05 05:55:39,146 INFO L78 Accepts]: Start accepts. Automaton has 130600 states and 488102 transitions. Word has length 33 [2021-06-05 05:55:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:39,160 INFO L482 AbstractCegarLoop]: Abstraction has 130600 states and 488102 transitions. [2021-06-05 05:55:39,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 130600 states and 488102 transitions. [2021-06-05 05:55:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:55:39,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:39,330 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:39,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 05:55:39,545 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash 966384908, now seen corresponding path program 95 times [2021-06-05 05:55:39,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:39,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961831813] [2021-06-05 05:55:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:39,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961831813] [2021-06-05 05:55:39,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961831813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961654659] [2021-06-05 05:55:39,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:39,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:55:39,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:55:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:55:39,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961654659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:39,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:39,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 05:55:39,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744190579] [2021-06-05 05:55:39,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:55:39,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:55:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:55:39,681 INFO L87 Difference]: Start difference. First operand 130600 states and 488102 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 05:55:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:40,907 INFO L93 Difference]: Finished difference Result 119213 states and 438130 transitions. [2021-06-05 05:55:40,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:55:40,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 33 [2021-06-05 05:55:40,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:41,740 INFO L225 Difference]: With dead ends: 119213 [2021-06-05 05:55:41,741 INFO L226 Difference]: Without dead ends: 117375 [2021-06-05 05:55:41,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=710, Invalid=2596, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:55:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117375 states. [2021-06-05 05:55:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117375 to 107160. [2021-06-05 05:55:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107160 states, 107159 states have (on average 3.7435399733106878) internal successors, (401154), 107159 states have internal predecessors, (401154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107160 states to 107160 states and 401154 transitions. [2021-06-05 05:55:44,573 INFO L78 Accepts]: Start accepts. Automaton has 107160 states and 401154 transitions. Word has length 33 [2021-06-05 05:55:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:44,573 INFO L482 AbstractCegarLoop]: Abstraction has 107160 states and 401154 transitions. [2021-06-05 05:55:44,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 05:55:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 107160 states and 401154 transitions. [2021-06-05 05:55:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:55:44,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:44,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:44,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:44,895 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1919330936, now seen corresponding path program 96 times [2021-06-05 05:55:44,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:44,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963513034] [2021-06-05 05:55:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:55:44,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:44,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963513034] [2021-06-05 05:55:44,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963513034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:44,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997933568] [2021-06-05 05:55:44,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:44,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:55:44,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:55:44,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:55:45,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997933568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:45,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:45,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 05:55:45,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092507712] [2021-06-05 05:55:45,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:55:45,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:55:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:55:45,013 INFO L87 Difference]: Start difference. First operand 107160 states and 401154 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:46,446 INFO L93 Difference]: Finished difference Result 117944 states and 436638 transitions. [2021-06-05 05:55:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:55:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:55:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:47,044 INFO L225 Difference]: With dead ends: 117944 [2021-06-05 05:55:47,044 INFO L226 Difference]: Without dead ends: 117764 [2021-06-05 05:55:47,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:55:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117764 states. [2021-06-05 05:55:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117764 to 113313. [2021-06-05 05:55:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113313 states, 113312 states have (on average 3.7259072295961593) internal successors, (422190), 113312 states have internal predecessors, (422190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113313 states to 113313 states and 422190 transitions. [2021-06-05 05:55:49,902 INFO L78 Accepts]: Start accepts. Automaton has 113313 states and 422190 transitions. Word has length 33 [2021-06-05 05:55:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:49,902 INFO L482 AbstractCegarLoop]: Abstraction has 113313 states and 422190 transitions. [2021-06-05 05:55:49,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 113313 states and 422190 transitions. [2021-06-05 05:55:50,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:50,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:50,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:50,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:50,247 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:50,247 INFO L82 PathProgramCache]: Analyzing trace with hash -45752080, now seen corresponding path program 97 times [2021-06-05 05:55:50,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:50,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690324397] [2021-06-05 05:55:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:50,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:50,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690324397] [2021-06-05 05:55:50,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690324397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:50,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146722777] [2021-06-05 05:55:50,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:50,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:55:50,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:55:50,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146722777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:50,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:50,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:55:50,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558130131] [2021-06-05 05:55:50,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:55:50,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:55:50,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:55:50,328 INFO L87 Difference]: Start difference. First operand 113313 states and 422190 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:51,000 INFO L93 Difference]: Finished difference Result 127937 states and 472018 transitions. [2021-06-05 05:55:51,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:55:51,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:55:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:51,845 INFO L225 Difference]: With dead ends: 127937 [2021-06-05 05:55:51,845 INFO L226 Difference]: Without dead ends: 127901 [2021-06-05 05:55:51,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:55:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127901 states. [2021-06-05 05:55:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127901 to 121383. [2021-06-05 05:55:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121383 states, 121382 states have (on average 3.7288807236657826) internal successors, (452619), 121382 states have internal predecessors, (452619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121383 states to 121383 states and 452619 transitions. [2021-06-05 05:55:54,611 INFO L78 Accepts]: Start accepts. Automaton has 121383 states and 452619 transitions. Word has length 34 [2021-06-05 05:55:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:54,611 INFO L482 AbstractCegarLoop]: Abstraction has 121383 states and 452619 transitions. [2021-06-05 05:55:54,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 121383 states and 452619 transitions. [2021-06-05 05:55:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:55:54,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:54,740 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:54,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 05:55:54,940 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1561990614, now seen corresponding path program 98 times [2021-06-05 05:55:54,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:54,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123037724] [2021-06-05 05:55:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:54,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123037724] [2021-06-05 05:55:54,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123037724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893326725] [2021-06-05 05:55:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:54,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:54,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:54,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:55:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:55:55,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893326725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:55,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:55,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:55:55,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837530694] [2021-06-05 05:55:55,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:55:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:55:55,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:55:55,026 INFO L87 Difference]: Start difference. First operand 121383 states and 452619 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:56,163 INFO L93 Difference]: Finished difference Result 138778 states and 510851 transitions. [2021-06-05 05:55:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:55:56,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:55:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:56,588 INFO L225 Difference]: With dead ends: 138778 [2021-06-05 05:55:56,588 INFO L226 Difference]: Without dead ends: 138767 [2021-06-05 05:55:56,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:55:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138767 states. [2021-06-05 05:55:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138767 to 121225. [2021-06-05 05:55:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121225 states, 121224 states have (on average 3.728568600277173) internal successors, (451992), 121224 states have internal predecessors, (451992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121225 states to 121225 states and 451992 transitions. [2021-06-05 05:55:59,433 INFO L78 Accepts]: Start accepts. Automaton has 121225 states and 451992 transitions. Word has length 34 [2021-06-05 05:55:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:59,433 INFO L482 AbstractCegarLoop]: Abstraction has 121225 states and 451992 transitions. [2021-06-05 05:55:59,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 121225 states and 451992 transitions. [2021-06-05 05:55:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:55:59,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:59,567 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:59,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:59,768 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:59,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1478942404, now seen corresponding path program 99 times [2021-06-05 05:55:59,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:59,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640006135] [2021-06-05 05:55:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:55:59,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:59,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640006135] [2021-06-05 05:55:59,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640006135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:59,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877286156] [2021-06-05 05:55:59,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:59,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:55:59,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:55:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:55:59,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877286156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:59,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:59,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 05:55:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133749257] [2021-06-05 05:55:59,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:55:59,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:55:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:55:59,891 INFO L87 Difference]: Start difference. First operand 121225 states and 451992 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 05:56:01,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:01,046 INFO L93 Difference]: Finished difference Result 130469 states and 476570 transitions. [2021-06-05 05:56:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:56:01,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 35 [2021-06-05 05:56:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:01,430 INFO L225 Difference]: With dead ends: 130469 [2021-06-05 05:56:01,431 INFO L226 Difference]: Without dead ends: 130433 [2021-06-05 05:56:01,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:56:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130433 states. [2021-06-05 05:56:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130433 to 120737. [2021-06-05 05:56:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120737 states, 120736 states have (on average 3.6850483699973497) internal successors, (444918), 120736 states have internal predecessors, (444918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120737 states to 120737 states and 444918 transitions. [2021-06-05 05:56:04,197 INFO L78 Accepts]: Start accepts. Automaton has 120737 states and 444918 transitions. Word has length 35 [2021-06-05 05:56:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:04,197 INFO L482 AbstractCegarLoop]: Abstraction has 120737 states and 444918 transitions. [2021-06-05 05:56:04,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 05:56:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 120737 states and 444918 transitions. [2021-06-05 05:56:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:56:04,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:04,346 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:04,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:04,550 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1852449502, now seen corresponding path program 100 times [2021-06-05 05:56:04,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:04,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325519852] [2021-06-05 05:56:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:04,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:04,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325519852] [2021-06-05 05:56:04,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325519852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:04,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334651610] [2021-06-05 05:56:04,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:04,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:56:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:56:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:04,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334651610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:04,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:04,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-06-05 05:56:04,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056843078] [2021-06-05 05:56:04,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:56:04,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:04,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:56:04,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:56:04,699 INFO L87 Difference]: Start difference. First operand 120737 states and 444918 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:09,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:09,887 INFO L93 Difference]: Finished difference Result 330781 states and 1196551 transitions. [2021-06-05 05:56:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-05 05:56:09,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:56:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:10,892 INFO L225 Difference]: With dead ends: 330781 [2021-06-05 05:56:10,892 INFO L226 Difference]: Without dead ends: 328223 [2021-06-05 05:56:10,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9784 ImplicationChecksByTransitivity, 2548.8ms TimeCoverageRelationStatistics Valid=3887, Invalid=18763, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 05:56:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328223 states. [2021-06-05 05:56:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328223 to 206609. [2021-06-05 05:56:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206609 states, 206608 states have (on average 3.7288197940060406) internal successors, (770404), 206608 states have internal predecessors, (770404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206609 states to 206609 states and 770404 transitions. [2021-06-05 05:56:17,909 INFO L78 Accepts]: Start accepts. Automaton has 206609 states and 770404 transitions. Word has length 35 [2021-06-05 05:56:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:17,910 INFO L482 AbstractCegarLoop]: Abstraction has 206609 states and 770404 transitions. [2021-06-05 05:56:17,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 206609 states and 770404 transitions. [2021-06-05 05:56:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:56:18,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:18,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:18,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:18,317 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1367087600, now seen corresponding path program 101 times [2021-06-05 05:56:18,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:18,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986573755] [2021-06-05 05:56:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:56:18,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:18,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986573755] [2021-06-05 05:56:18,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986573755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:18,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827359280] [2021-06-05 05:56:18,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:56:18,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:56:18,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:18,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:56:18,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:56:18,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827359280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:18,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:18,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 05:56:18,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509897803] [2021-06-05 05:56:18,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:56:18,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:18,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:56:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:56:18,426 INFO L87 Difference]: Start difference. First operand 206609 states and 770404 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:20,803 INFO L93 Difference]: Finished difference Result 229213 states and 842009 transitions. [2021-06-05 05:56:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:56:20,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:56:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:21,976 INFO L225 Difference]: With dead ends: 229213 [2021-06-05 05:56:21,976 INFO L226 Difference]: Without dead ends: 228931 [2021-06-05 05:56:21,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=951, Invalid=3879, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:56:22,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228931 states. [2021-06-05 05:56:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228931 to 215342. [2021-06-05 05:56:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215342 states, 215341 states have (on average 3.7305204303871533) internal successors, (803334), 215341 states have internal predecessors, (803334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215342 states to 215342 states and 803334 transitions. [2021-06-05 05:56:27,617 INFO L78 Accepts]: Start accepts. Automaton has 215342 states and 803334 transitions. Word has length 35 [2021-06-05 05:56:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:27,617 INFO L482 AbstractCegarLoop]: Abstraction has 215342 states and 803334 transitions. [2021-06-05 05:56:27,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 215342 states and 803334 transitions. [2021-06-05 05:56:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:56:27,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:27,875 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:28,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:28,076 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:28,076 INFO L82 PathProgramCache]: Analyzing trace with hash 355190302, now seen corresponding path program 102 times [2021-06-05 05:56:28,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:28,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695452142] [2021-06-05 05:56:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:28,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:28,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695452142] [2021-06-05 05:56:28,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695452142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:28,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343846012] [2021-06-05 05:56:28,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:28,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:56:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:56:28,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:56:28,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:28,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:28,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:28,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 05:56:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:28,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 05:56:28,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:28,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:28,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:28,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:49 [2021-06-05 05:56:28,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 05:56:28,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:28,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 05:56:28,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:28,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:28,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:28,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:28 [2021-06-05 05:56:28,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:28,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-05 05:56:28,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:56:28,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:28,856 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 05:56:28,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:24 [2021-06-05 05:56:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:28,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343846012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:28,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:28,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-06-05 05:56:28,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036187066] [2021-06-05 05:56:28,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:56:28,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:28,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:56:28,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:56:28,934 INFO L87 Difference]: Start difference. First operand 215342 states and 803334 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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 05:56:33,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:33,524 INFO L93 Difference]: Finished difference Result 324747 states and 1205125 transitions. [2021-06-05 05:56:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:56:33,525 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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 37 [2021-06-05 05:56:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:35,122 INFO L225 Difference]: With dead ends: 324747 [2021-06-05 05:56:35,122 INFO L226 Difference]: Without dead ends: 324573 [2021-06-05 05:56:35,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1866.4ms TimeCoverageRelationStatistics Valid=458, Invalid=2848, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:56:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324573 states. [2021-06-05 05:56:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324573 to 215554. [2021-06-05 05:56:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215554 states, 215553 states have (on average 3.7299272104772374) internal successors, (803997), 215553 states have internal predecessors, (803997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215554 states to 215554 states and 803997 transitions. [2021-06-05 05:56:41,103 INFO L78 Accepts]: Start accepts. Automaton has 215554 states and 803997 transitions. Word has length 37 [2021-06-05 05:56:41,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:41,103 INFO L482 AbstractCegarLoop]: Abstraction has 215554 states and 803997 transitions. [2021-06-05 05:56:41,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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 05:56:41,103 INFO L276 IsEmpty]: Start isEmpty. Operand 215554 states and 803997 transitions. [2021-06-05 05:56:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:56:41,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:41,360 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:41,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 05:56:41,561 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1235101602, now seen corresponding path program 103 times [2021-06-05 05:56:41,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:41,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562863421] [2021-06-05 05:56:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:41,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:41,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562863421] [2021-06-05 05:56:41,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562863421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:41,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640716145] [2021-06-05 05:56:41,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:41,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:56:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:42,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:56:42,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:42,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 05:56:42,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:56:42,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:42,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 05:56:42,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:42,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:56 [2021-06-05 05:56:42,173 INFO L446 ElimStorePlain]: Different costs {0=[A], 2=[v_C_155]} [2021-06-05 05:56:42,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 05:56:42,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:42,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-06-05 05:56:42,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:42,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,197 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:38 [2021-06-05 05:56:42,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 05:56:42,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:42,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:42,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:56:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:42,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640716145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:42,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:42,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2021-06-05 05:56:42,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510603896] [2021-06-05 05:56:42,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:56:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:42,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:56:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:56:42,305 INFO L87 Difference]: Start difference. First operand 215554 states and 803997 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 05:56:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:46,309 INFO L93 Difference]: Finished difference Result 321607 states and 1194609 transitions. [2021-06-05 05:56:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:56:46,310 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 37 [2021-06-05 05:56:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:47,928 INFO L225 Difference]: With dead ends: 321607 [2021-06-05 05:56:47,928 INFO L226 Difference]: Without dead ends: 321469 [2021-06-05 05:56:47,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1060.6ms TimeCoverageRelationStatistics Valid=333, Invalid=1829, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:56:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321469 states. [2021-06-05 05:56:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321469 to 215627. [2021-06-05 05:56:52,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215627 states, 215626 states have (on average 3.729689369556547) internal successors, (804218), 215626 states have internal predecessors, (804218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215627 states to 215627 states and 804218 transitions. [2021-06-05 05:56:53,942 INFO L78 Accepts]: Start accepts. Automaton has 215627 states and 804218 transitions. Word has length 37 [2021-06-05 05:56:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:53,943 INFO L482 AbstractCegarLoop]: Abstraction has 215627 states and 804218 transitions. [2021-06-05 05:56:53,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 05:56:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 215627 states and 804218 transitions. [2021-06-05 05:56:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:56:54,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:54,178 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:54,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:54,378 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:54,378 INFO L82 PathProgramCache]: Analyzing trace with hash -366535714, now seen corresponding path program 104 times [2021-06-05 05:56:54,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:54,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563313460] [2021-06-05 05:56:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:54,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:54,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563313460] [2021-06-05 05:56:54,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563313460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:54,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088996617] [2021-06-05 05:56:54,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:54,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:54,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:56:54,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:54,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:56:54,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:54,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:54,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:54,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-06-05 05:56:54,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:54,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:56:54,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:54,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:54,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:54,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-06-05 05:56:55,045 INFO L446 ElimStorePlain]: Different costs {0=[A], 3=[v_C_158]} [2021-06-05 05:56:55,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 05:56:55,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:55,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:55,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:55,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:56:55,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2021-06-05 05:56:55,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:55,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:55,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:55,068 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:61, output treesize:35 [2021-06-05 05:56:55,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-06-05 05:56:55,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:55,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:55,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:55,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-06-05 05:56:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:55,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088996617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:55,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:55,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2021-06-05 05:56:55,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124450810] [2021-06-05 05:56:55,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:56:55,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:55,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:56:55,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:56:55,642 INFO L87 Difference]: Start difference. First operand 215627 states and 804218 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 05:56:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:58,820 INFO L93 Difference]: Finished difference Result 320502 states and 1190679 transitions. [2021-06-05 05:56:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:56:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 37 [2021-06-05 05:56:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:00,325 INFO L225 Difference]: With dead ends: 320502 [2021-06-05 05:57:00,325 INFO L226 Difference]: Without dead ends: 320448 [2021-06-05 05:57:00,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1806.4ms TimeCoverageRelationStatistics Valid=374, Invalid=1882, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:57:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320448 states. [2021-06-05 05:57:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320448 to 215755. [2021-06-05 05:57:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215755 states, 215754 states have (on average 3.7293306265469006) internal successors, (804618), 215754 states have internal predecessors, (804618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215755 states to 215755 states and 804618 transitions. [2021-06-05 05:57:06,246 INFO L78 Accepts]: Start accepts. Automaton has 215755 states and 804618 transitions. Word has length 37 [2021-06-05 05:57:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:06,246 INFO L482 AbstractCegarLoop]: Abstraction has 215755 states and 804618 transitions. [2021-06-05 05:57:06,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 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 05:57:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 215755 states and 804618 transitions. [2021-06-05 05:57:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:57:06,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:06,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:06,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:06,725 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:06,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1956827618, now seen corresponding path program 105 times [2021-06-05 05:57:06,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:06,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360756656] [2021-06-05 05:57:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:07,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:07,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360756656] [2021-06-05 05:57:07,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360756656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:07,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035661911] [2021-06-05 05:57:07,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:07,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:57:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:07,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:57:07,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:07,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:57:07,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:07,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:07,319 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 05:57:07,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-06-05 05:57:07,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:57:07,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:07,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:07,385 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 05:57:07,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:57 [2021-06-05 05:57:07,583 INFO L446 ElimStorePlain]: Different costs {3=[v_C_161], 14=[A]} [2021-06-05 05:57:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-06-05 05:57:07,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:07,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:07,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:07,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:07,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:07,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 38 [2021-06-05 05:57:07,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 05:57:07,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:07,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:07,623 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:72, output treesize:41 [2021-06-05 05:57:07,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:57:07,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:07,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 05:57:07,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:07,749 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.0 percent of original size [2021-06-05 05:57:07,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:57:07,750 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:56, output treesize:20 [2021-06-05 05:57:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:07,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035661911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:07,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:07,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-05 05:57:07,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513925175] [2021-06-05 05:57:07,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:57:07,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:07,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:57:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:07,831 INFO L87 Difference]: Start difference. First operand 215755 states and 804618 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 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 05:57:08,998 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-06-05 05:57:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:13,664 INFO L93 Difference]: Finished difference Result 320329 states and 1190063 transitions. [2021-06-05 05:57:13,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:57:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 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 37 [2021-06-05 05:57:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:14,763 INFO L225 Difference]: With dead ends: 320329 [2021-06-05 05:57:14,763 INFO L226 Difference]: Without dead ends: 320275 [2021-06-05 05:57:14,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2979.7ms TimeCoverageRelationStatistics Valid=432, Invalid=3600, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:57:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320275 states. [2021-06-05 05:57:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320275 to 215832. [2021-06-05 05:57:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215832 states, 215831 states have (on average 3.7291306624164275) internal successors, (804862), 215831 states have internal predecessors, (804862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215832 states to 215832 states and 804862 transitions. [2021-06-05 05:57:20,860 INFO L78 Accepts]: Start accepts. Automaton has 215832 states and 804862 transitions. Word has length 37 [2021-06-05 05:57:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:20,861 INFO L482 AbstractCegarLoop]: Abstraction has 215832 states and 804862 transitions. [2021-06-05 05:57:20,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 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 05:57:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 215832 states and 804862 transitions. [2021-06-05 05:57:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:57:21,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:21,104 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:21,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:21,309 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:21,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1096164250, now seen corresponding path program 106 times [2021-06-05 05:57:21,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:21,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771753565] [2021-06-05 05:57:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:21,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771753565] [2021-06-05 05:57:21,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771753565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941180020] [2021-06-05 05:57:21,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:21,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:21,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:57:21,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:21,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:57:21,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:21,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:21,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:21,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-06-05 05:57:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:21,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:57:21,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:21,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:21,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:21,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-06-05 05:57:21,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 05:57:21,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:21,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:21,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2021-06-05 05:57:21,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:21,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:21,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:21,977 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 05:57:22,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:57:22,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:22,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:22,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:22,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:12 [2021-06-05 05:57:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:22,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941180020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:22,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:22,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-06-05 05:57:22,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964853743] [2021-06-05 05:57:22,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:57:22,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:22,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:57:22,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:57:22,115 INFO L87 Difference]: Start difference. First operand 215832 states and 804862 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 05:57:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:29,267 INFO L93 Difference]: Finished difference Result 425358 states and 1539803 transitions. [2021-06-05 05:57:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:57:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 37 [2021-06-05 05:57:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:31,223 INFO L225 Difference]: With dead ends: 425358 [2021-06-05 05:57:31,224 INFO L226 Difference]: Without dead ends: 425220 [2021-06-05 05:57:31,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 3574.4ms TimeCoverageRelationStatistics Valid=947, Invalid=6025, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:57:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425220 states. [2021-06-05 05:57:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425220 to 216458. [2021-06-05 05:57:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216458 states, 216457 states have (on average 3.727876668345214) internal successors, (806925), 216457 states have internal predecessors, (806925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216458 states to 216458 states and 806925 transitions. [2021-06-05 05:57:37,655 INFO L78 Accepts]: Start accepts. Automaton has 216458 states and 806925 transitions. Word has length 37 [2021-06-05 05:57:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:37,655 INFO L482 AbstractCegarLoop]: Abstraction has 216458 states and 806925 transitions. [2021-06-05 05:57:37,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 05:57:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 216458 states and 806925 transitions. [2021-06-05 05:57:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:57:37,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:37,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:38,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:38,115 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash 964753098, now seen corresponding path program 107 times [2021-06-05 05:57:38,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:38,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102887592] [2021-06-05 05:57:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:38,757 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-06-05 05:57:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:39,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:39,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102887592] [2021-06-05 05:57:39,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102887592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:39,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538469094] [2021-06-05 05:57:39,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:39,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:57:39,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:39,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:57:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:39,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:57:39,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:39,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:39,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:39,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 05:57:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,297 INFO L354 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-06-05 05:57:39,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 48 [2021-06-05 05:57:39,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:39,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:39,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:39,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:59 [2021-06-05 05:57:39,477 INFO L446 ElimStorePlain]: Different costs {10=[v_C_167], 12=[A]} [2021-06-05 05:57:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,489 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:57:39,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2021-06-05 05:57:39,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:39,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:39,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:39,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 86 [2021-06-05 05:57:39,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 05:57:39,569 INFO L628 ElimStorePlain]: treesize reduction 41, result has 54.4 percent of original size [2021-06-05 05:57:39,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 05:57:39,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:49 [2021-06-05 05:57:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:39,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 33 treesize of output 93 [2021-06-05 05:57:39,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 05:57:39,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:39,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:39,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-06-05 05:57:39,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:39,945 INFO L628 ElimStorePlain]: treesize reduction 319, result has 13.1 percent of original size [2021-06-05 05:57:39,950 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 05:57:39,950 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:84, output treesize:25 [2021-06-05 05:57:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:40,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538469094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:40,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:40,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 05:57:40,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9233597] [2021-06-05 05:57:40,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:57:40,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:57:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:57:40,030 INFO L87 Difference]: Start difference. First operand 216458 states and 806925 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:57:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:44,270 INFO L93 Difference]: Finished difference Result 325391 states and 1207086 transitions. [2021-06-05 05:57:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:57:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 37 [2021-06-05 05:57:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:45,277 INFO L225 Difference]: With dead ends: 325391 [2021-06-05 05:57:45,277 INFO L226 Difference]: Without dead ends: 325289 [2021-06-05 05:57:45,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2542.3ms TimeCoverageRelationStatistics Valid=399, Invalid=2357, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:57:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325289 states. [2021-06-05 05:57:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325289 to 216645. [2021-06-05 05:57:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216645 states, 216644 states have (on average 3.7275484204501392) internal successors, (807551), 216644 states have internal predecessors, (807551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216645 states to 216645 states and 807551 transitions. [2021-06-05 05:57:51,718 INFO L78 Accepts]: Start accepts. Automaton has 216645 states and 807551 transitions. Word has length 37 [2021-06-05 05:57:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:51,718 INFO L482 AbstractCegarLoop]: Abstraction has 216645 states and 807551 transitions. [2021-06-05 05:57:51,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:57:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 216645 states and 807551 transitions. [2021-06-05 05:57:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:57:51,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:51,987 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:52,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 05:57:52,201 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:52,202 INFO L82 PathProgramCache]: Analyzing trace with hash 876324308, now seen corresponding path program 108 times [2021-06-05 05:57:52,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:52,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515722541] [2021-06-05 05:57:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:52,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:52,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515722541] [2021-06-05 05:57:52,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515722541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:52,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271547893] [2021-06-05 05:57:52,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:53,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:57:53,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:53,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:57:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:53,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:57:53,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:53,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:53,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:70 [2021-06-05 05:57:53,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:57:53,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:53,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:53,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:60 [2021-06-05 05:57:53,663 INFO L446 ElimStorePlain]: Different costs {2=[v_C_170], 3=[A]} [2021-06-05 05:57:53,694 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-06-05 05:57:53,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2021-06-05 05:57:53,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:53,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,725 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-05 05:57:53,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 40 [2021-06-05 05:57:53,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 05:57:53,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 05:57:53,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:53 [2021-06-05 05:57:53,876 INFO L446 ElimStorePlain]: Different costs {2=[C], 5=[v_prenex_4]} [2021-06-05 05:57:53,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-06-05 05:57:53,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:53,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:53,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 05:57:53,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 05:57:53,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,968 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 05:57:53,968 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:94, output treesize:56 [2021-06-05 05:57:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:54,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271547893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:54,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:54,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 05:57:54,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111936635] [2021-06-05 05:57:54,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:57:54,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:54,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:57:54,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:57:54,130 INFO L87 Difference]: Start difference. First operand 216645 states and 807551 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:58,334 INFO L93 Difference]: Finished difference Result 323254 states and 1199966 transitions. [2021-06-05 05:57:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:57:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:57:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:59,435 INFO L225 Difference]: With dead ends: 323254 [2021-06-05 05:57:59,435 INFO L226 Difference]: Without dead ends: 323075 [2021-06-05 05:57:59,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1953.2ms TimeCoverageRelationStatistics Valid=334, Invalid=2018, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:57:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323075 states. [2021-06-05 05:58:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323075 to 216624. [2021-06-05 05:58:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216624 states, 216623 states have (on average 3.727655881416101) internal successors, (807496), 216623 states have internal predecessors, (807496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216624 states to 216624 states and 807496 transitions. [2021-06-05 05:58:05,518 INFO L78 Accepts]: Start accepts. Automaton has 216624 states and 807496 transitions. Word has length 37 [2021-06-05 05:58:05,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:05,519 INFO L482 AbstractCegarLoop]: Abstraction has 216624 states and 807496 transitions. [2021-06-05 05:58:05,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 216624 states and 807496 transitions. [2021-06-05 05:58:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:58:05,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:05,758 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:05,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 05:58:05,959 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:05,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:05,959 INFO L82 PathProgramCache]: Analyzing trace with hash 500337086, now seen corresponding path program 109 times [2021-06-05 05:58:05,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:05,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798829866] [2021-06-05 05:58:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:06,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:06,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798829866] [2021-06-05 05:58:06,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798829866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:06,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920679087] [2021-06-05 05:58:06,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:06,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:58:06,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:06,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:58:06,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:06,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:06,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:06,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:65 [2021-06-05 05:58:06,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 05:58:06,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:06,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:06,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:06,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:79, output treesize:78 [2021-06-05 05:58:06,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 05:58:06,639 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 05:58:06,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:06,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-06-05 05:58:06,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:06,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:06,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:06,662 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:43 [2021-06-05 05:58:07,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 05:58:07,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:07,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:07,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:07,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 05:58:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:07,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920679087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:07,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:07,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:58:07,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582431094] [2021-06-05 05:58:07,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:58:07,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:07,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:58:07,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:58:07,258 INFO L87 Difference]: Start difference. First operand 216624 states and 807496 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:09,981 INFO L93 Difference]: Finished difference Result 322219 states and 1196250 transitions. [2021-06-05 05:58:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:58:09,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:58:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:10,977 INFO L225 Difference]: With dead ends: 322219 [2021-06-05 05:58:10,977 INFO L226 Difference]: Without dead ends: 322165 [2021-06-05 05:58:10,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1294.9ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:58:11,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322165 states. [2021-06-05 05:58:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322165 to 216605. [2021-06-05 05:58:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216605 states, 216604 states have (on average 3.7277935772192574) internal successors, (807455), 216604 states have internal predecessors, (807455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216605 states to 216605 states and 807455 transitions. [2021-06-05 05:58:17,441 INFO L78 Accepts]: Start accepts. Automaton has 216605 states and 807455 transitions. Word has length 37 [2021-06-05 05:58:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:17,441 INFO L482 AbstractCegarLoop]: Abstraction has 216605 states and 807455 transitions. [2021-06-05 05:58:17,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 216605 states and 807455 transitions. [2021-06-05 05:58:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:58:17,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:17,720 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:17,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 05:58:17,920 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash -842986744, now seen corresponding path program 110 times [2021-06-05 05:58:17,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:17,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456648552] [2021-06-05 05:58:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:18,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:18,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456648552] [2021-06-05 05:58:18,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456648552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:18,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748042626] [2021-06-05 05:58:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:18,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:18,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:18,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:58:18,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:18,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:58:18,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:18,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 05:58:18,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 05:58:18,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:18,577 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 05:58:18,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:86 [2021-06-05 05:58:18,677 INFO L446 ElimStorePlain]: Different costs {3=[v_C_176], 10=[A]} [2021-06-05 05:58:18,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2021-06-05 05:58:18,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,718 INFO L354 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2021-06-05 05:58:18,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 57 [2021-06-05 05:58:18,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:18,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,729 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:100, output treesize:51 [2021-06-05 05:58:18,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-06-05 05:58:18,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:18,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:15 [2021-06-05 05:58:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:18,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748042626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:18,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:18,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:58:18,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590581370] [2021-06-05 05:58:18,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:58:18,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:58:18,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:58:18,805 INFO L87 Difference]: Start difference. First operand 216605 states and 807455 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:22,343 INFO L93 Difference]: Finished difference Result 325469 states and 1207215 transitions. [2021-06-05 05:58:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:58:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:58:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:23,447 INFO L225 Difference]: With dead ends: 325469 [2021-06-05 05:58:23,447 INFO L226 Difference]: Without dead ends: 325309 [2021-06-05 05:58:23,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1217.3ms TimeCoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:58:23,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325309 states. [2021-06-05 05:58:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325309 to 216679. [2021-06-05 05:58:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216679 states, 216678 states have (on average 3.7276096327269035) internal successors, (807691), 216678 states have internal predecessors, (807691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216679 states to 216679 states and 807691 transitions. [2021-06-05 05:58:29,427 INFO L78 Accepts]: Start accepts. Automaton has 216679 states and 807691 transitions. Word has length 37 [2021-06-05 05:58:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:29,427 INFO L482 AbstractCegarLoop]: Abstraction has 216679 states and 807691 transitions. [2021-06-05 05:58:29,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 216679 states and 807691 transitions. [2021-06-05 05:58:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:58:29,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:29,661 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:29,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 05:58:29,862 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1861688648, now seen corresponding path program 111 times [2021-06-05 05:58:29,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:29,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671991805] [2021-06-05 05:58:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:30,707 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-06-05 05:58:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:30,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671991805] [2021-06-05 05:58:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671991805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740426734] [2021-06-05 05:58:30,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:30,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:58:30,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:58:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:30,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:58:30,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:30,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:30,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:30,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-06-05 05:58:31,049 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 05:58:31,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 05:58:31,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:31,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:31,064 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 05:58:31,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:71 [2021-06-05 05:58:31,195 INFO L446 ElimStorePlain]: Different costs {3=[v_C_179], 10=[A]} [2021-06-05 05:58:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:31,208 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 05:58:31,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2021-06-05 05:58:31,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:31,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:31,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:31,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:31,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:31,264 INFO L354 Elim1Store]: treesize reduction 36, result has 46.3 percent of original size [2021-06-05 05:58:31,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 67 [2021-06-05 05:58:31,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-05 05:58:31,309 INFO L628 ElimStorePlain]: treesize reduction 56, result has 54.5 percent of original size [2021-06-05 05:58:31,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 05:58:31,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:89, output treesize:95 [2021-06-05 05:58:31,586 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_8], 10=[C]} [2021-06-05 05:58:31,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:31,604 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 12 treesize of output 31 [2021-06-05 05:58:31,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 05:58:31,669 INFO L628 ElimStorePlain]: treesize reduction 31, result has 78.0 percent of original size [2021-06-05 05:58:31,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:31,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:31,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:31,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 94 [2021-06-05 05:58:32,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 05:58:32,676 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 82 [2021-06-05 05:58:32,677 INFO L628 ElimStorePlain]: treesize reduction 1482, result has 10.2 percent of original size [2021-06-05 05:58:32,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:58:32,718 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:124, output treesize:260 [2021-06-05 05:58:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:32,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740426734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:32,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:32,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-06-05 05:58:32,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143858123] [2021-06-05 05:58:32,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:58:32,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:32,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:58:32,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:58:32,884 INFO L87 Difference]: Start difference. First operand 216679 states and 807691 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:38,041 INFO L93 Difference]: Finished difference Result 323625 states and 1201167 transitions. [2021-06-05 05:58:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:58:38,053 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:58:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:39,158 INFO L225 Difference]: With dead ends: 323625 [2021-06-05 05:58:39,158 INFO L226 Difference]: Without dead ends: 323314 [2021-06-05 05:58:39,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 3088.0ms TimeCoverageRelationStatistics Valid=473, Invalid=3309, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:58:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323314 states. [2021-06-05 05:58:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323314 to 216643. [2021-06-05 05:58:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216643 states, 216642 states have (on average 3.727721309810655) internal successors, (807581), 216642 states have internal predecessors, (807581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216643 states to 216643 states and 807581 transitions. [2021-06-05 05:58:45,769 INFO L78 Accepts]: Start accepts. Automaton has 216643 states and 807581 transitions. Word has length 37 [2021-06-05 05:58:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:45,769 INFO L482 AbstractCegarLoop]: Abstraction has 216643 states and 807581 transitions. [2021-06-05 05:58:45,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 216643 states and 807581 transitions. [2021-06-05 05:58:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:58:46,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:46,075 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:46,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:46,289 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:46,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1834321192, now seen corresponding path program 112 times [2021-06-05 05:58:46,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:46,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329545928] [2021-06-05 05:58:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:46,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:46,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329545928] [2021-06-05 05:58:46,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329545928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086294077] [2021-06-05 05:58:46,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:46,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:46,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:46,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:58:46,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:46,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:58:46,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:46,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:46,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:46,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-06-05 05:58:46,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:46,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-06-05 05:58:46,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:46,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:46,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:46,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:71 [2021-06-05 05:58:47,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2021-06-05 05:58:47,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:47,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:47,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-06-05 05:58:47,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:47,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:47,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:47,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:37 [2021-06-05 05:58:47,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 05:58:47,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:47,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:47,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:47,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 05:58:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:47,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086294077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:47,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:47,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:58:47,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370406845] [2021-06-05 05:58:47,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:58:47,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:58:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:58:47,226 INFO L87 Difference]: Start difference. First operand 216643 states and 807581 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:50,521 INFO L93 Difference]: Finished difference Result 321834 states and 1194937 transitions. [2021-06-05 05:58:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:58:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:58:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:51,512 INFO L225 Difference]: With dead ends: 321834 [2021-06-05 05:58:51,513 INFO L226 Difference]: Without dead ends: 321686 [2021-06-05 05:58:51,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1343.1ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:58:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321686 states. [2021-06-05 05:58:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321686 to 216659. [2021-06-05 05:58:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216659 states, 216658 states have (on average 3.7276814149489055) internal successors, (807632), 216658 states have internal predecessors, (807632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216659 states to 216659 states and 807632 transitions. [2021-06-05 05:58:57,453 INFO L78 Accepts]: Start accepts. Automaton has 216659 states and 807632 transitions. Word has length 37 [2021-06-05 05:58:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:57,453 INFO L482 AbstractCegarLoop]: Abstraction has 216659 states and 807632 transitions. [2021-06-05 05:58:57,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 216659 states and 807632 transitions. [2021-06-05 05:58:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:58:57,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:57,704 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:57,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:57,904 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1284650824, now seen corresponding path program 113 times [2021-06-05 05:58:57,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:57,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631365298] [2021-06-05 05:58:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:58,613 WARN L205 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-06-05 05:58:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:58,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:58,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631365298] [2021-06-05 05:58:58,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631365298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:58,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590497379] [2021-06-05 05:58:58,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:58,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:58:58,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:58,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:58:58,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:59,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:58:59,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:59,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:59,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:59,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-06-05 05:58:59,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,142 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:59,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 40 [2021-06-05 05:58:59,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:59,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:59,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:59,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-06-05 05:58:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,281 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 05:58:59,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 61 [2021-06-05 05:58:59,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:59,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:59,298 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 05:58:59,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:72 [2021-06-05 05:58:59,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:59,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 96 [2021-06-05 05:58:59,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:58:59,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:59,430 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 05:58:59,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:48 [2021-06-05 05:58:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:59,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:59,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:59,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-06-05 05:58:59,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:59,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:59,585 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 05:58:59,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:12 [2021-06-05 05:58:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:59,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590497379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:59,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:59,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 05:58:59,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707624000] [2021-06-05 05:58:59,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:58:59,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:59,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:58:59,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:58:59,623 INFO L87 Difference]: Start difference. First operand 216659 states and 807632 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:59:03,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:03,035 INFO L93 Difference]: Finished difference Result 320671 states and 1191422 transitions. [2021-06-05 05:59:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:59:03,035 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 37 [2021-06-05 05:59:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:04,180 INFO L225 Difference]: With dead ends: 320671 [2021-06-05 05:59:04,181 INFO L226 Difference]: Without dead ends: 320650 [2021-06-05 05:59:04,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1889.0ms TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:59:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320650 states. [2021-06-05 05:59:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320650 to 216671. [2021-06-05 05:59:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216671 states, 216670 states have (on average 3.727650343840864) internal successors, (807670), 216670 states have internal predecessors, (807670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216671 states to 216671 states and 807670 transitions. [2021-06-05 05:59:10,351 INFO L78 Accepts]: Start accepts. Automaton has 216671 states and 807670 transitions. Word has length 37 [2021-06-05 05:59:10,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:10,351 INFO L482 AbstractCegarLoop]: Abstraction has 216671 states and 807670 transitions. [2021-06-05 05:59:10,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:59:10,351 INFO L276 IsEmpty]: Start isEmpty. Operand 216671 states and 807670 transitions. [2021-06-05 05:59:10,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:59:10,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:10,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:59:10,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:10,822 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:10,822 INFO L82 PathProgramCache]: Analyzing trace with hash -488176478, now seen corresponding path program 114 times [2021-06-05 05:59:10,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:10,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122198389] [2021-06-05 05:59:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:11,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122198389] [2021-06-05 05:59:11,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122198389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908976709] [2021-06-05 05:59:11,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:11,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:59:11,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:11,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:59:11,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:11,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:59:11,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:11,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:59 [2021-06-05 05:59:11,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:59:11,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:11,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 05:59:11,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:11,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:74 [2021-06-05 05:59:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:11,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:11,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:59:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2021-06-05 05:59:11,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:11,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:89 [2021-06-05 05:59:11,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:11,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:11,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2021-06-05 05:59:11,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:11,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:53 [2021-06-05 05:59:11,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-06-05 05:59:11,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:11,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:11,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:17 [2021-06-05 05:59:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:11,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908976709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:11,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:11,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:59:11,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536249139] [2021-06-05 05:59:11,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:59:11,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:59:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:59:11,624 INFO L87 Difference]: Start difference. First operand 216671 states and 807670 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:16,476 INFO L93 Difference]: Finished difference Result 380615 states and 1412256 transitions. [2021-06-05 05:59:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:59:16,505 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:59:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:17,798 INFO L225 Difference]: With dead ends: 380615 [2021-06-05 05:59:17,799 INFO L226 Difference]: Without dead ends: 380587 [2021-06-05 05:59:17,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1940.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1969, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:59:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380587 states. [2021-06-05 05:59:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380587 to 216720. [2021-06-05 05:59:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216720 states, 216719 states have (on average 3.7275550367065184) internal successors, (807832), 216719 states have internal predecessors, (807832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216720 states to 216720 states and 807832 transitions. [2021-06-05 05:59:24,099 INFO L78 Accepts]: Start accepts. Automaton has 216720 states and 807832 transitions. Word has length 37 [2021-06-05 05:59:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:24,100 INFO L482 AbstractCegarLoop]: Abstraction has 216720 states and 807832 transitions. [2021-06-05 05:59:24,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 216720 states and 807832 transitions. [2021-06-05 05:59:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:59:24,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:24,345 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:59:24,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:24,545 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash -135800788, now seen corresponding path program 115 times [2021-06-05 05:59:24,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:24,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070534531] [2021-06-05 05:59:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:25,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:25,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070534531] [2021-06-05 05:59:25,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070534531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:25,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977242321] [2021-06-05 05:59:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:59:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:59:25,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:25,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 05:59:25,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:59:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:25,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-06-05 05:59:25,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:25,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:77 [2021-06-05 05:59:25,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:25,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:59:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:25,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:25,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2021-06-05 05:59:25,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:25,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:89 [2021-06-05 05:59:25,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2021-06-05 05:59:25,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:25,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:36 [2021-06-05 05:59:25,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-06-05 05:59:25,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:25,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:25,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-06-05 05:59:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:25,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977242321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:25,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:25,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:59:25,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156390994] [2021-06-05 05:59:25,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:59:25,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:25,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:59:25,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:59:25,980 INFO L87 Difference]: Start difference. First operand 216720 states and 807832 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:28,851 INFO L93 Difference]: Finished difference Result 322034 states and 1195739 transitions. [2021-06-05 05:59:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:59:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:59:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:30,356 INFO L225 Difference]: With dead ends: 322034 [2021-06-05 05:59:30,356 INFO L226 Difference]: Without dead ends: 321959 [2021-06-05 05:59:30,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 876.2ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:59:30,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321959 states. [2021-06-05 05:59:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321959 to 216732. [2021-06-05 05:59:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216732 states, 216731 states have (on average 3.727496297253277) internal successors, (807864), 216731 states have internal predecessors, (807864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216732 states to 216732 states and 807864 transitions. [2021-06-05 05:59:36,884 INFO L78 Accepts]: Start accepts. Automaton has 216732 states and 807864 transitions. Word has length 37 [2021-06-05 05:59:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:36,884 INFO L482 AbstractCegarLoop]: Abstraction has 216732 states and 807864 transitions. [2021-06-05 05:59:36,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 216732 states and 807864 transitions. [2021-06-05 05:59:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:59:37,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:37,181 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:59:37,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:37,397 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash -674408686, now seen corresponding path program 116 times [2021-06-05 05:59:37,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:37,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756778755] [2021-06-05 05:59:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:37,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:37,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756778755] [2021-06-05 05:59:37,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756778755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:37,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697875842] [2021-06-05 05:59:37,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:37,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:59:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:59:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:37,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-06-05 05:59:37,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:37,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:37,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:37,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-06-05 05:59:37,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:37,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 05:59:37,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:37,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:37,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:37,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:78, output treesize:77 [2021-06-05 05:59:38,611 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 05:59:38,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 39 [2021-06-05 05:59:38,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:38,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:38,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 34 [2021-06-05 05:59:38,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:38,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:38,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:38,648 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:47 [2021-06-05 05:59:38,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-06-05 05:59:38,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:38,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:38,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:38,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 05:59:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:38,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697875842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:38,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:38,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:59:38,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551122472] [2021-06-05 05:59:38,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:59:38,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:38,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:59:38,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:59:38,719 INFO L87 Difference]: Start difference. First operand 216732 states and 807864 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:41,259 INFO L93 Difference]: Finished difference Result 322027 states and 1195511 transitions. [2021-06-05 05:59:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:59:41,260 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:59:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:42,267 INFO L225 Difference]: With dead ends: 322027 [2021-06-05 05:59:42,267 INFO L226 Difference]: Without dead ends: 321867 [2021-06-05 05:59:42,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1395.4ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:59:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321867 states. [2021-06-05 05:59:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321867 to 216769. [2021-06-05 05:59:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216769 states, 216768 states have (on average 3.727395187481547) internal successors, (807980), 216768 states have internal predecessors, (807980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216769 states to 216769 states and 807980 transitions. [2021-06-05 05:59:48,204 INFO L78 Accepts]: Start accepts. Automaton has 216769 states and 807980 transitions. Word has length 37 [2021-06-05 05:59:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:48,205 INFO L482 AbstractCegarLoop]: Abstraction has 216769 states and 807980 transitions. [2021-06-05 05:59:48,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 216769 states and 807980 transitions. [2021-06-05 05:59:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:59:49,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:49,111 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:59:49,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:49,311 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2042746648, now seen corresponding path program 117 times [2021-06-05 05:59:49,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:49,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771763349] [2021-06-05 05:59:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:49,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:49,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771763349] [2021-06-05 05:59:49,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771763349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:49,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463630238] [2021-06-05 05:59:49,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:59:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:59:49,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:49,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-06-05 05:59:49,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:49,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:49,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:49,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-06-05 05:59:49,856 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-06-05 05:59:49,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 05:59:49,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:49,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:49,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:49,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:72 [2021-06-05 05:59:50,055 INFO L446 ElimStorePlain]: Different costs {3=[v_C_197], 7=[A]} [2021-06-05 05:59:50,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:50,067 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-06-05 05:59:50,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 41 [2021-06-05 05:59:50,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:50,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:50,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:50,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:50,111 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 05:59:50,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 67 [2021-06-05 05:59:50,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:50,146 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-06-05 05:59:50,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 05:59:50,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:61 [2021-06-05 05:59:50,461 INFO L446 ElimStorePlain]: Different costs {3=[C], 10=[v_prenex_11]} [2021-06-05 05:59:50,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:50,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12 treesize of output 31 [2021-06-05 05:59:50,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 05:59:50,558 INFO L628 ElimStorePlain]: treesize reduction 15, result has 88.2 percent of original size [2021-06-05 05:59:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:50,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:50,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 45 treesize of output 93