/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 20:00:32,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 20:00:32,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 20:00:32,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 20:00:32,849 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 [2021-08-12 20:00:32,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 20:00:32,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 20:00:32,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 20:00:32,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 20:00:32,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 20:00:32,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 20:00:32,871 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 20:00:32,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 20:00:32,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 20:00:32,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 20:00:32,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 20:00:32,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 20:00:32,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 20:00:32,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 20:00:32,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 20:00:32,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 20:00:32,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 20:00:32,873 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 20:00:32,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 20:00:32,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 20:00:32,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 20:00:32,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 20:00:32,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 20:00:32,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 20:00:32,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 20:00:32,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 20:00:32,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 20:00:32,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 20:00:32,874 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 20:00:32,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 20:00:32,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 20:00:33,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 20:00:33,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 20:00:33,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 20:00:33,220 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 20:00:33,221 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 20:00:33,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl [2021-08-12 20:00:33,222 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl' [2021-08-12 20:00:33,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 20:00:33,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 20:00:33,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 20:00:33,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 20:00:33,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 20:00:33,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 20:00:33,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 20:00:33,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 20:00:33,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 20:00:33,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/1) ... [2021-08-12 20:00:33,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 20:00:33,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 20:00:33,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 20:00:33,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 20:00:33,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (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 [2021-08-12 20:00:33,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 20:00:33,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 20:00:33,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 20:00:33,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 20:00:33,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 20:00:33,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 20:00:33,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 20:00:33,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 20:00:33,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 20:00:33,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 20:00:33,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 20:00:33,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 20:00:33,390 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 20:00:33,579 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 20:00:33,579 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 20:00:33,581 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 08:00:33 BoogieIcfgContainer [2021-08-12 20:00:33,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 20:00:33,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 20:00:33,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 20:00:33,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 20:00:33,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:00:33" (1/2) ... [2021-08-12 20:00:33,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5847bccd and model type mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 08:00:33, skipping insertion in model container [2021-08-12 20:00:33,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 08:00:33" (2/2) ... [2021-08-12 20:00:33,587 INFO L111 eAbstractionObserver]: Analyzing ICFG mts-array.wvr.bpl [2021-08-12 20:00:33,592 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 20:00:33,592 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 20:00:33,593 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 20:00:33,626 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 20:00:33,644 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 20:00:33,661 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 20:00:33,661 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 20:00:33,661 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 20:00:33,661 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 20:00:33,662 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 20:00:33,662 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 20:00:33,662 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 20:00:33,662 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 20:00:33,681 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-12 20:00:33,721 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 20:00:33,746 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:33,747 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:33,747 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:33,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1113490327, now seen corresponding path program 1 times [2021-08-12 20:00:33,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:33,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307383709] [2021-08-12 20:00:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:33,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:33,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307383709] [2021-08-12 20:00:33,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307383709] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:00:33,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:00:33,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 20:00:33,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850875312] [2021-08-12 20:00:33,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 20:00:33,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:33,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 20:00:33,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:00:33,999 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:34,154 INFO L93 Difference]: Finished difference Result 221 states and 622 transitions. [2021-08-12 20:00:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 20:00:34,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 20:00:34,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:34,178 INFO L225 Difference]: With dead ends: 221 [2021-08-12 20:00:34,178 INFO L226 Difference]: Without dead ends: 154 [2021-08-12 20:00:34,183 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 20:00:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-12 20:00:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-08-12 20:00:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-12 20:00:34,259 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-08-12 20:00:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:34,260 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-12 20:00:34,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-12 20:00:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 20:00:34,263 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:34,263 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:34,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 20:00:34,264 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2043191081, now seen corresponding path program 1 times [2021-08-12 20:00:34,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:34,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811392916] [2021-08-12 20:00:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:00:34,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:34,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811392916] [2021-08-12 20:00:34,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811392916] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:00:34,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:00:34,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 20:00:34,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020819459] [2021-08-12 20:00:34,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 20:00:34,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:34,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 20:00:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 20:00:34,353 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:34,449 INFO L93 Difference]: Finished difference Result 211 states and 599 transitions. [2021-08-12 20:00:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 20:00:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 20:00:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:34,454 INFO L225 Difference]: With dead ends: 211 [2021-08-12 20:00:34,454 INFO L226 Difference]: Without dead ends: 158 [2021-08-12 20:00:34,455 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:00:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-12 20:00:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-08-12 20:00:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-12 20:00:34,484 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-12 20:00:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:34,484 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-12 20:00:34,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-12 20:00:34,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 20:00:34,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:34,490 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:34,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 20:00:34,491 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:34,492 INFO L82 PathProgramCache]: Analyzing trace with hash -219246905, now seen corresponding path program 1 times [2021-08-12 20:00:34,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:34,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285385654] [2021-08-12 20:00:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:34,916 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-08-12 20:00:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:35,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:35,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285385654] [2021-08-12 20:00:35,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285385654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:35,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840751338] [2021-08-12 20:00:35,067 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 [2021-08-12 20:00:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:35,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 20:00:35,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:35,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:35,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:35,581 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 20 treesize of output 14 [2021-08-12 20:00:35,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:35,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:35,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:35,591 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 25 treesize of output 17 [2021-08-12 20:00:35,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:35,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:35,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:35,606 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 27 treesize of output 19 [2021-08-12 20:00:35,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:35,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:00:35,622 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 32 treesize of output 22 [2021-08-12 20:00:35,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:35,688 INFO L628 ElimStorePlain]: treesize reduction 54, result has 43.2 percent of original size [2021-08-12 20:00:35,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:00:35,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-08-12 20:00:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:35,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840751338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:35,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:35,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:00:35,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703131781] [2021-08-12 20:00:35,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:35,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:35,749 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:36,126 INFO L93 Difference]: Finished difference Result 332 states and 937 transitions. [2021-08-12 20:00:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 20:00:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 20:00:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:36,132 INFO L225 Difference]: With dead ends: 332 [2021-08-12 20:00:36,132 INFO L226 Difference]: Without dead ends: 315 [2021-08-12 20:00:36,133 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:00:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-12 20:00:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-12 20:00:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-12 20:00:36,159 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-12 20:00:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:36,159 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-12 20:00:36,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-12 20:00:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 20:00:36,160 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:36,161 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:36,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 20:00:36,384 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:36,386 INFO L82 PathProgramCache]: Analyzing trace with hash -387055997, now seen corresponding path program 2 times [2021-08-12 20:00:36,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:36,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957832583] [2021-08-12 20:00:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:36,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:36,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957832583] [2021-08-12 20:00:36,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957832583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:36,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145475325] [2021-08-12 20:00:36,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:00:36,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:00:36,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:36,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 20:00:36,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:36,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:00:36,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-08-12 20:00:36,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:37,000 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-12 20:00:37,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-08-12 20:00:37,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:37,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:37,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-08-12 20:00:37,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:37,025 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:37,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-08-12 20:00:37,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:37,065 INFO L628 ElimStorePlain]: treesize reduction 49, result has 38.0 percent of original size [2021-08-12 20:00:37,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:00:37,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:31 [2021-08-12 20:00:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145475325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:37,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:37,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-12 20:00:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81182449] [2021-08-12 20:00:37,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 20:00:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:37,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 20:00:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-12 20:00:37,151 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:37,765 INFO L93 Difference]: Finished difference Result 376 states and 1079 transitions. [2021-08-12 20:00:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 20:00:37,766 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 20:00:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:37,771 INFO L225 Difference]: With dead ends: 376 [2021-08-12 20:00:37,771 INFO L226 Difference]: Without dead ends: 359 [2021-08-12 20:00:37,772 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 629.1ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:00:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-12 20:00:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-12 20:00:37,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-12 20:00:37,786 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-12 20:00:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:37,786 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-12 20:00:37,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-12 20:00:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 20:00:37,787 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:37,787 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:38,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 20:00:38,001 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:38,002 INFO L82 PathProgramCache]: Analyzing trace with hash -88282549, now seen corresponding path program 3 times [2021-08-12 20:00:38,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:38,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258945767] [2021-08-12 20:00:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:38,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:38,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258945767] [2021-08-12 20:00:38,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258945767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:38,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724290217] [2021-08-12 20:00:38,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:00:38,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:00:38,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 20:00:38,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:38,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:38,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-08-12 20:00:38,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:38,564 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-12 20:00:38,565 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-08-12 20:00:38,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:38,618 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-08-12 20:00:38,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 20:00:38,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:38,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:38,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:00:38,664 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:27 [2021-08-12 20:00:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:38,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724290217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:38,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:38,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 20:00:38,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282583147] [2021-08-12 20:00:38,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:38,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:38,735 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:39,040 INFO L93 Difference]: Finished difference Result 298 states and 833 transitions. [2021-08-12 20:00:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:00:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 20:00:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:39,043 INFO L225 Difference]: With dead ends: 298 [2021-08-12 20:00:39,043 INFO L226 Difference]: Without dead ends: 281 [2021-08-12 20:00:39,045 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:00:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-12 20:00:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-08-12 20:00:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-12 20:00:39,060 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-12 20:00:39,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:39,060 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-12 20:00:39,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-12 20:00:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 20:00:39,061 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:39,061 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:39,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 20:00:39,277 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1482543051, now seen corresponding path program 4 times [2021-08-12 20:00:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:39,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88828783] [2021-08-12 20:00:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:39,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88828783] [2021-08-12 20:00:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88828783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619940030] [2021-08-12 20:00:39,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:39,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:00:39,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 20:00:39,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:39,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:39,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-08-12 20:00:39,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:39,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:00:39,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 1 [2021-08-12 20:00:39,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:39,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:39,838 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:00:39,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-08-12 20:00:39,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:39,847 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-12 20:00:39,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-08-12 20:00:39,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:00:39,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:00:39,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:00:39,907 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:73 [2021-08-12 20:00:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:40,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619940030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:40,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:40,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:00:40,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385677393] [2021-08-12 20:00:40,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:40,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:40,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:40,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:40,055 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:40,545 INFO L93 Difference]: Finished difference Result 427 states and 1235 transitions. [2021-08-12 20:00:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 20:00:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 20:00:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:40,549 INFO L225 Difference]: With dead ends: 427 [2021-08-12 20:00:40,549 INFO L226 Difference]: Without dead ends: 410 [2021-08-12 20:00:40,550 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 524.9ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:00:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-12 20:00:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-08-12 20:00:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-12 20:00:40,578 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-12 20:00:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:40,579 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-12 20:00:40,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-12 20:00:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:40,580 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:40,580 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:40,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:40,804 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:40,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1258502875, now seen corresponding path program 5 times [2021-08-12 20:00:40,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:40,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044345885] [2021-08-12 20:00:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:40,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:40,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044345885] [2021-08-12 20:00:40,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044345885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:40,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611058863] [2021-08-12 20:00:40,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:40,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:00:40,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:40,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611058863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:40,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:40,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:00:40,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580829580] [2021-08-12 20:00:40,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:00:40,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:40,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:00:40,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:00:40,998 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:41,487 INFO L93 Difference]: Finished difference Result 644 states and 1840 transitions. [2021-08-12 20:00:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:00:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:41,491 INFO L225 Difference]: With dead ends: 644 [2021-08-12 20:00:41,491 INFO L226 Difference]: Without dead ends: 619 [2021-08-12 20:00:41,492 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:00:41,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-12 20:00:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-12 20:00:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-12 20:00:41,531 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-12 20:00:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:41,531 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-12 20:00:41,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-12 20:00:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:41,533 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:41,533 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:41,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 20:00:41,758 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145577, now seen corresponding path program 6 times [2021-08-12 20:00:41,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:41,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031684244] [2021-08-12 20:00:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:41,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:41,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031684244] [2021-08-12 20:00:41,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031684244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:41,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131977767] [2021-08-12 20:00:41,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:41,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:00:41,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:41,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:41,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131977767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:41,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:41,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:00:41,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956700582] [2021-08-12 20:00:41,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:41,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:41,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:41,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:41,988 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:43,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:43,007 INFO L93 Difference]: Finished difference Result 1103 states and 3056 transitions. [2021-08-12 20:00:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 20:00:43,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:43,036 INFO L225 Difference]: With dead ends: 1103 [2021-08-12 20:00:43,037 INFO L226 Difference]: Without dead ends: 1078 [2021-08-12 20:00:43,038 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:00:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-12 20:00:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-12 20:00:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-12 20:00:43,092 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-12 20:00:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:43,093 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-12 20:00:43,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-12 20:00:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:43,096 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:43,096 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:43,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 20:00:43,318 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:43,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:43,319 INFO L82 PathProgramCache]: Analyzing trace with hash -705917075, now seen corresponding path program 7 times [2021-08-12 20:00:43,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:43,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659765130] [2021-08-12 20:00:43,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:43,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659765130] [2021-08-12 20:00:43,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659765130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:43,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356371111] [2021-08-12 20:00:43,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:43,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:43,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356371111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:43,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:43,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:00:43,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477880132] [2021-08-12 20:00:43,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:43,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:43,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:43,554 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:44,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:44,424 INFO L93 Difference]: Finished difference Result 976 states and 2754 transitions. [2021-08-12 20:00:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 20:00:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:44,432 INFO L225 Difference]: With dead ends: 976 [2021-08-12 20:00:44,432 INFO L226 Difference]: Without dead ends: 951 [2021-08-12 20:00:44,433 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 20:00:44,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-12 20:00:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-12 20:00:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-12 20:00:44,464 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-12 20:00:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:44,464 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-12 20:00:44,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-12 20:00:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:44,465 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:44,465 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:44,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:44,681 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash -731730967, now seen corresponding path program 1 times [2021-08-12 20:00:44,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:44,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122067461] [2021-08-12 20:00:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:00:44,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:44,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122067461] [2021-08-12 20:00:44,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122067461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:44,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765510429] [2021-08-12 20:00:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:44,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:00:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:00:44,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765510429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:44,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:44,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 20:00:44,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669368009] [2021-08-12 20:00:44,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:00:44,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:00:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:00:44,812 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:45,088 INFO L93 Difference]: Finished difference Result 745 states and 2187 transitions. [2021-08-12 20:00:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:00:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:45,092 INFO L225 Difference]: With dead ends: 745 [2021-08-12 20:00:45,092 INFO L226 Difference]: Without dead ends: 663 [2021-08-12 20:00:45,093 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-12 20:00:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-12 20:00:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-12 20:00:45,133 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-12 20:00:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:45,133 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-12 20:00:45,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-12 20:00:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:45,134 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:45,134 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:45,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-12 20:00:45,357 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1168699675, now seen corresponding path program 8 times [2021-08-12 20:00:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:45,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802929380] [2021-08-12 20:00:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:45,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:45,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802929380] [2021-08-12 20:00:45,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802929380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:45,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148838755] [2021-08-12 20:00:45,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:45,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:00:45,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:45,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148838755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:45,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:45,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 20:00:45,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131804214] [2021-08-12 20:00:45,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:45,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:45,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:45,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:45,529 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:45,849 INFO L93 Difference]: Finished difference Result 765 states and 2274 transitions. [2021-08-12 20:00:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:00:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:45,854 INFO L225 Difference]: With dead ends: 765 [2021-08-12 20:00:45,854 INFO L226 Difference]: Without dead ends: 672 [2021-08-12 20:00:45,855 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-12 20:00:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-12 20:00:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-12 20:00:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-12 20:00:45,903 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-12 20:00:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:45,903 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-12 20:00:45,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-12 20:00:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:45,905 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:45,905 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:46,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:46,129 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1874657007, now seen corresponding path program 2 times [2021-08-12 20:00:46,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:46,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78048984] [2021-08-12 20:00:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:00:46,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:46,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78048984] [2021-08-12 20:00:46,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78048984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:46,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791721197] [2021-08-12 20:00:46,156 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 [2021-08-12 20:00:46,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:00:46,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:00:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:00:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791721197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:46,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:46,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 20:00:46,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292918882] [2021-08-12 20:00:46,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:00:46,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:00:46,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:00:46,243 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:46,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:46,545 INFO L93 Difference]: Finished difference Result 966 states and 2852 transitions. [2021-08-12 20:00:46,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:00:46,545 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:46,551 INFO L225 Difference]: With dead ends: 966 [2021-08-12 20:00:46,551 INFO L226 Difference]: Without dead ends: 830 [2021-08-12 20:00:46,551 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-12 20:00:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-12 20:00:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-12 20:00:46,604 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-12 20:00:46,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:46,605 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-12 20:00:46,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:46,605 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-12 20:00:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:46,606 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:46,606 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:46,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:46,821 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1073628723, now seen corresponding path program 9 times [2021-08-12 20:00:46,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:46,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044285603] [2021-08-12 20:00:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:46,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:46,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044285603] [2021-08-12 20:00:46,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044285603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:46,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692603434] [2021-08-12 20:00:46,860 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 [2021-08-12 20:00:46,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:00:46,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:46,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:46,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692603434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:46,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:46,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:00:46,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300451012] [2021-08-12 20:00:46,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:00:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:00:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:00:46,978 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:47,550 INFO L93 Difference]: Finished difference Result 1221 states and 3556 transitions. [2021-08-12 20:00:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:00:47,551 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:47,559 INFO L225 Difference]: With dead ends: 1221 [2021-08-12 20:00:47,559 INFO L226 Difference]: Without dead ends: 1196 [2021-08-12 20:00:47,560 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-12 20:00:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-12 20:00:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-12 20:00:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-12 20:00:47,628 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-12 20:00:47,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:47,629 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-12 20:00:47,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-12 20:00:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:47,635 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:47,635 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:47,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 20:00:47,846 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:47,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1858542817, now seen corresponding path program 10 times [2021-08-12 20:00:47,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:47,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537150306] [2021-08-12 20:00:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:47,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:47,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537150306] [2021-08-12 20:00:47,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537150306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:47,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861768179] [2021-08-12 20:00:47,885 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 [2021-08-12 20:00:47,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:00:47,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:47,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:47,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:47,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861768179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:47,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:47,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:00:47,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924960711] [2021-08-12 20:00:47,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:00:47,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:47,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:00:47,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:00:47,989 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:48,727 INFO L93 Difference]: Finished difference Result 1517 states and 4304 transitions. [2021-08-12 20:00:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 20:00:48,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:48,736 INFO L225 Difference]: With dead ends: 1517 [2021-08-12 20:00:48,736 INFO L226 Difference]: Without dead ends: 1492 [2021-08-12 20:00:48,737 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:00:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-12 20:00:48,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-12 20:00:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-12 20:00:48,797 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-12 20:00:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:48,797 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-12 20:00:48,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-12 20:00:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:48,799 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:48,799 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:49,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:49,008 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash 775520161, now seen corresponding path program 11 times [2021-08-12 20:00:49,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:49,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355815279] [2021-08-12 20:00:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:49,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:49,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355815279] [2021-08-12 20:00:49,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355815279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:49,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738086049] [2021-08-12 20:00:49,055 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 [2021-08-12 20:00:49,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:00:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:49,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:49,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738086049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:49,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:49,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 20:00:49,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313383364] [2021-08-12 20:00:49,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:49,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:49,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:49,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:49,166 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:49,670 INFO L93 Difference]: Finished difference Result 1363 states and 4072 transitions. [2021-08-12 20:00:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:00:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:49,676 INFO L225 Difference]: With dead ends: 1363 [2021-08-12 20:00:49,676 INFO L226 Difference]: Without dead ends: 1248 [2021-08-12 20:00:49,677 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-12 20:00:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-12 20:00:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-12 20:00:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-12 20:00:49,781 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-12 20:00:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:49,782 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-12 20:00:49,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-12 20:00:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:49,785 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:49,785 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:50,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 20:00:50,001 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:50,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2048369017, now seen corresponding path program 12 times [2021-08-12 20:00:50,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:50,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431011197] [2021-08-12 20:00:50,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:50,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:50,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431011197] [2021-08-12 20:00:50,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431011197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:50,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212031817] [2021-08-12 20:00:50,043 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 [2021-08-12 20:00:50,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:00:50,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:50,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:50,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:50,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212031817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:50,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:50,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 20:00:50,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188716883] [2021-08-12 20:00:50,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:50,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:50,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:50,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:50,149 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:50,671 INFO L93 Difference]: Finished difference Result 1408 states and 4261 transitions. [2021-08-12 20:00:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:00:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:50,678 INFO L225 Difference]: With dead ends: 1408 [2021-08-12 20:00:50,678 INFO L226 Difference]: Without dead ends: 1329 [2021-08-12 20:00:50,678 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:00:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-12 20:00:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-12 20:00:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-12 20:00:50,758 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-12 20:00:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:50,758 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-12 20:00:50,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-12 20:00:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:50,760 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:50,760 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:50,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:50,974 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:50,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1490304735, now seen corresponding path program 13 times [2021-08-12 20:00:50,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:50,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443582682] [2021-08-12 20:00:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:51,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:51,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443582682] [2021-08-12 20:00:51,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443582682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:51,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928581242] [2021-08-12 20:00:51,012 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 [2021-08-12 20:00:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:51,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:51,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928581242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:51,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:51,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:00:51,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909210283] [2021-08-12 20:00:51,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:00:51,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:00:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:00:51,101 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:51,759 INFO L93 Difference]: Finished difference Result 1573 states and 4696 transitions. [2021-08-12 20:00:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:00:51,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:51,767 INFO L225 Difference]: With dead ends: 1573 [2021-08-12 20:00:51,767 INFO L226 Difference]: Without dead ends: 1544 [2021-08-12 20:00:51,768 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:00:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-12 20:00:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-12 20:00:51,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-12 20:00:51,849 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-12 20:00:51,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:51,849 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-12 20:00:51,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-12 20:00:51,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:51,851 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:51,851 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:52,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-12 20:00:52,053 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1541712485, now seen corresponding path program 14 times [2021-08-12 20:00:52,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:52,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715258370] [2021-08-12 20:00:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:52,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:52,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715258370] [2021-08-12 20:00:52,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715258370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:52,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022316060] [2021-08-12 20:00:52,096 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 [2021-08-12 20:00:52,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:00:52,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:52,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:52,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022316060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:52,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:52,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:00:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964242545] [2021-08-12 20:00:52,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:52,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:52,217 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:53,599 INFO L93 Difference]: Finished difference Result 2759 states and 8237 transitions. [2021-08-12 20:00:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 20:00:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:53,612 INFO L225 Difference]: With dead ends: 2759 [2021-08-12 20:00:53,612 INFO L226 Difference]: Without dead ends: 2734 [2021-08-12 20:00:53,613 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:00:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-12 20:00:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-12 20:00:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-12 20:00:53,721 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-12 20:00:53,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:53,721 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-12 20:00:53,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:53,722 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-12 20:00:53,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:53,724 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:53,724 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:53,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 20:00:53,937 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:53,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1224350167, now seen corresponding path program 15 times [2021-08-12 20:00:53,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:53,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316911802] [2021-08-12 20:00:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:53,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:53,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316911802] [2021-08-12 20:00:53,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316911802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:53,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4625316] [2021-08-12 20:00:53,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:54,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:00:54,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:54,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4625316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:54,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:54,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:00:54,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232023955] [2021-08-12 20:00:54,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:54,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:54,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:54,112 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:55,552 INFO L93 Difference]: Finished difference Result 2718 states and 8127 transitions. [2021-08-12 20:00:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 20:00:55,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:55,564 INFO L225 Difference]: With dead ends: 2718 [2021-08-12 20:00:55,564 INFO L226 Difference]: Without dead ends: 2693 [2021-08-12 20:00:55,566 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:00:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-12 20:00:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-12 20:00:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-12 20:00:55,675 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-12 20:00:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:55,675 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-12 20:00:55,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:55,676 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-12 20:00:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:55,678 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:55,678 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:55,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:55,893 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 936318707, now seen corresponding path program 16 times [2021-08-12 20:00:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:55,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342968407] [2021-08-12 20:00:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:55,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:55,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342968407] [2021-08-12 20:00:55,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342968407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:55,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150795181] [2021-08-12 20:00:55,933 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 [2021-08-12 20:00:55,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:00:55,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:55,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:55,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:56,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150795181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:56,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:56,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:00:56,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792843697] [2021-08-12 20:00:56,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:00:56,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:56,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:00:56,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:00:56,042 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:57,610 INFO L93 Difference]: Finished difference Result 2702 states and 7881 transitions. [2021-08-12 20:00:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 20:00:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:57,616 INFO L225 Difference]: With dead ends: 2702 [2021-08-12 20:00:57,617 INFO L226 Difference]: Without dead ends: 2677 [2021-08-12 20:00:57,617 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 20:00:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-12 20:00:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-12 20:00:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-12 20:00:57,721 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-12 20:00:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:57,721 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-12 20:00:57,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-12 20:00:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:57,723 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:57,724 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:57,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-12 20:00:57,947 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:57,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2008635681, now seen corresponding path program 17 times [2021-08-12 20:00:57,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:57,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883904421] [2021-08-12 20:00:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:57,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:57,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883904421] [2021-08-12 20:00:57,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883904421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:57,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238334696] [2021-08-12 20:00:57,985 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 [2021-08-12 20:00:58,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:00:58,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:58,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238334696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:58,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:58,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:00:58,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192406112] [2021-08-12 20:00:58,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:00:58,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:58,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:00:58,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:00:58,077 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:00:59,377 INFO L93 Difference]: Finished difference Result 2499 states and 7378 transitions. [2021-08-12 20:00:59,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 20:00:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:00:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:00:59,383 INFO L225 Difference]: With dead ends: 2499 [2021-08-12 20:00:59,383 INFO L226 Difference]: Without dead ends: 2470 [2021-08-12 20:00:59,384 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:00:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-12 20:00:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-12 20:00:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-12 20:00:59,510 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-12 20:00:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:00:59,510 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-12 20:00:59,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:00:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-12 20:00:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:00:59,512 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:00:59,512 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:00:59,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:00:59,729 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:00:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:00:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2817957, now seen corresponding path program 18 times [2021-08-12 20:00:59,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:00:59,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759122692] [2021-08-12 20:00:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:00:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:00:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:59,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:00:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759122692] [2021-08-12 20:00:59,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759122692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:59,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768025609] [2021-08-12 20:00:59,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:00:59,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:00:59,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:00:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:00:59,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:00:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:00:59,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768025609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:00:59,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:00:59,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:00:59,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459974515] [2021-08-12 20:00:59,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:00:59,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:00:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:00:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:00:59,902 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:01,507 INFO L93 Difference]: Finished difference Result 2539 states and 7492 transitions. [2021-08-12 20:01:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 20:01:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:01,515 INFO L225 Difference]: With dead ends: 2539 [2021-08-12 20:01:01,515 INFO L226 Difference]: Without dead ends: 2514 [2021-08-12 20:01:01,516 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 20:01:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-12 20:01:01,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-12 20:01:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-12 20:01:01,637 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-12 20:01:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:01,637 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-12 20:01:01,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-12 20:01:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:01,639 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:01,639 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:01,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-12 20:01:01,853 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:01,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:01,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1052559437, now seen corresponding path program 19 times [2021-08-12 20:01:01,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:01,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221945859] [2021-08-12 20:01:01,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:01,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:01,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221945859] [2021-08-12 20:01:01,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221945859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:01,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655840483] [2021-08-12 20:01:01,890 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 [2021-08-12 20:01:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:01,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:01,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:02,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655840483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:02,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:02,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:01:02,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122240788] [2021-08-12 20:01:02,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:01:02,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:02,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:01:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:01:02,002 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:03,503 INFO L93 Difference]: Finished difference Result 2357 states and 7054 transitions. [2021-08-12 20:01:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 20:01:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:03,511 INFO L225 Difference]: With dead ends: 2357 [2021-08-12 20:01:03,511 INFO L226 Difference]: Without dead ends: 2328 [2021-08-12 20:01:03,512 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:01:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-12 20:01:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-12 20:01:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-12 20:01:03,642 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-12 20:01:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:03,642 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-12 20:01:03,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-12 20:01:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:03,644 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:03,644 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:03,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-12 20:01:03,868 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1615861683, now seen corresponding path program 3 times [2021-08-12 20:01:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:03,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061717352] [2021-08-12 20:01:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:01:03,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:03,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061717352] [2021-08-12 20:01:03,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061717352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:03,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367435382] [2021-08-12 20:01:03,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:03,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:01:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:01:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:01:03,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367435382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:03,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:03,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 20:01:03,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506083095] [2021-08-12 20:01:03,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:01:03,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:03,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:01:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:01:03,966 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:04,339 INFO L93 Difference]: Finished difference Result 1005 states and 3240 transitions. [2021-08-12 20:01:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:01:04,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:04,342 INFO L225 Difference]: With dead ends: 1005 [2021-08-12 20:01:04,342 INFO L226 Difference]: Without dead ends: 929 [2021-08-12 20:01:04,343 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:01:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-12 20:01:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-12 20:01:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-12 20:01:04,421 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-12 20:01:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:04,421 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-12 20:01:04,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-12 20:01:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:04,423 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:04,423 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:04,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:04,644 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:04,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash -685661939, now seen corresponding path program 20 times [2021-08-12 20:01:04,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:04,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050824583] [2021-08-12 20:01:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:04,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:04,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050824583] [2021-08-12 20:01:04,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050824583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:04,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924140916] [2021-08-12 20:01:04,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:04,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:01:04,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:04,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:04,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924140916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:04,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:04,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 20:01:04,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761301201] [2021-08-12 20:01:04,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 20:01:04,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:04,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 20:01:04,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:01:04,768 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:05,538 INFO L93 Difference]: Finished difference Result 1580 states and 4827 transitions. [2021-08-12 20:01:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:01:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:05,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:05,543 INFO L225 Difference]: With dead ends: 1580 [2021-08-12 20:01:05,543 INFO L226 Difference]: Without dead ends: 1555 [2021-08-12 20:01:05,544 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:01:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-12 20:01:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-12 20:01:05,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-12 20:01:05,673 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-12 20:01:05,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:05,673 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-12 20:01:05,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-12 20:01:05,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:05,675 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:05,675 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:05,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-12 20:01:05,898 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1217017513, now seen corresponding path program 21 times [2021-08-12 20:01:05,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:05,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050600944] [2021-08-12 20:01:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:05,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050600944] [2021-08-12 20:01:05,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050600944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865163302] [2021-08-12 20:01:05,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:05,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:01:05,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:05,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:06,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865163302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:06,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:06,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 20:01:06,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66162931] [2021-08-12 20:01:06,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 20:01:06,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:06,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 20:01:06,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 20:01:06,009 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:06,850 INFO L93 Difference]: Finished difference Result 1630 states and 4954 transitions. [2021-08-12 20:01:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 20:01:06,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:06,854 INFO L225 Difference]: With dead ends: 1630 [2021-08-12 20:01:06,854 INFO L226 Difference]: Without dead ends: 1605 [2021-08-12 20:01:06,855 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-12 20:01:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-12 20:01:06,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-12 20:01:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-12 20:01:06,968 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-12 20:01:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:06,969 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-12 20:01:06,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-12 20:01:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:06,970 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:06,970 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:07,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:07,183 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:07,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2131830039, now seen corresponding path program 22 times [2021-08-12 20:01:07,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:07,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434914913] [2021-08-12 20:01:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:01:07,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:07,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434914913] [2021-08-12 20:01:07,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434914913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:07,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278734988] [2021-08-12 20:01:07,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:07,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:01:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:07,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:01:07,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278734988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:07,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:07,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 20:01:07,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281862900] [2021-08-12 20:01:07,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 20:01:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 20:01:07,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 20:01:07,298 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:08,049 INFO L93 Difference]: Finished difference Result 1549 states and 4744 transitions. [2021-08-12 20:01:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 20:01:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:08,052 INFO L225 Difference]: With dead ends: 1549 [2021-08-12 20:01:08,052 INFO L226 Difference]: Without dead ends: 1520 [2021-08-12 20:01:08,053 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:01:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-12 20:01:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-12 20:01:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-12 20:01:08,159 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-12 20:01:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:08,159 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-12 20:01:08,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-12 20:01:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:08,161 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:08,161 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:08,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 20:01:08,371 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:08,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1241435117, now seen corresponding path program 23 times [2021-08-12 20:01:08,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:08,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267213660] [2021-08-12 20:01:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:08,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:08,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267213660] [2021-08-12 20:01:08,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267213660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:08,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052754349] [2021-08-12 20:01:08,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:08,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:01:08,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:08,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:08,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:08,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052754349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:08,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:08,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 20:01:08,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251021252] [2021-08-12 20:01:08,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 20:01:08,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:08,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 20:01:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:01:08,483 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:09,268 INFO L93 Difference]: Finished difference Result 1533 states and 4706 transitions. [2021-08-12 20:01:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:01:09,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:09,272 INFO L225 Difference]: With dead ends: 1533 [2021-08-12 20:01:09,272 INFO L226 Difference]: Without dead ends: 1496 [2021-08-12 20:01:09,272 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-12 20:01:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-12 20:01:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-12 20:01:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-12 20:01:09,383 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-12 20:01:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:09,383 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-12 20:01:09,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-12 20:01:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:09,384 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:09,384 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:09,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 20:01:09,589 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1243112745, now seen corresponding path program 24 times [2021-08-12 20:01:09,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:09,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104798325] [2021-08-12 20:01:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:09,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:09,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104798325] [2021-08-12 20:01:09,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104798325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:09,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092851031] [2021-08-12 20:01:09,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:09,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:01:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:09,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:09,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092851031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:09,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:09,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:01:09,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939932025] [2021-08-12 20:01:09,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:01:09,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:09,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:01:09,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:01:09,750 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:11,279 INFO L93 Difference]: Finished difference Result 2437 states and 7628 transitions. [2021-08-12 20:01:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 20:01:11,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:11,284 INFO L225 Difference]: With dead ends: 2437 [2021-08-12 20:01:11,284 INFO L226 Difference]: Without dead ends: 2412 [2021-08-12 20:01:11,285 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 20:01:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-12 20:01:11,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-12 20:01:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-12 20:01:11,401 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-12 20:01:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:11,401 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-12 20:01:11,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-12 20:01:11,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:11,403 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:11,403 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:11,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:11,605 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:11,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1522949907, now seen corresponding path program 25 times [2021-08-12 20:01:11,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:11,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244804097] [2021-08-12 20:01:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:11,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:11,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244804097] [2021-08-12 20:01:11,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244804097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:11,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546862305] [2021-08-12 20:01:11,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:11,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:11,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:11,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546862305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:11,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:11,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:01:11,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41737678] [2021-08-12 20:01:11,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:01:11,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:01:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:01:11,766 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:13,223 INFO L93 Difference]: Finished difference Result 2360 states and 7430 transitions. [2021-08-12 20:01:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 20:01:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:13,228 INFO L225 Difference]: With dead ends: 2360 [2021-08-12 20:01:13,228 INFO L226 Difference]: Without dead ends: 2335 [2021-08-12 20:01:13,229 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 20:01:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-12 20:01:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-12 20:01:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 20:01:13,346 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 20:01:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:13,346 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 20:01:13,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 20:01:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:13,348 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:13,348 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:13,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:13,561 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:13,561 INFO L82 PathProgramCache]: Analyzing trace with hash 637718967, now seen corresponding path program 26 times [2021-08-12 20:01:13,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:13,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694545560] [2021-08-12 20:01:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:13,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:13,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694545560] [2021-08-12 20:01:13,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694545560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:13,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281962236] [2021-08-12 20:01:13,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:13,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:01:13,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:13,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:13,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:13,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281962236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:13,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:13,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:01:13,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113153567] [2021-08-12 20:01:13,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:01:13,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:13,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:01:13,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:01:13,720 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:15,149 INFO L93 Difference]: Finished difference Result 2310 states and 7184 transitions. [2021-08-12 20:01:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 20:01:15,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:15,154 INFO L225 Difference]: With dead ends: 2310 [2021-08-12 20:01:15,154 INFO L226 Difference]: Without dead ends: 2285 [2021-08-12 20:01:15,155 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:01:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-12 20:01:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-12 20:01:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-12 20:01:15,276 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-12 20:01:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:15,276 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-12 20:01:15,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-12 20:01:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:15,278 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:15,278 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:15,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:15,481 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1710035941, now seen corresponding path program 27 times [2021-08-12 20:01:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019765254] [2021-08-12 20:01:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:15,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:15,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019765254] [2021-08-12 20:01:15,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019765254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:15,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879183236] [2021-08-12 20:01:15,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:15,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:01:15,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:15,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:15,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879183236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:15,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:15,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:01:15,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213247220] [2021-08-12 20:01:15,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:01:15,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:15,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:01:15,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:01:15,610 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:16,926 INFO L93 Difference]: Finished difference Result 2201 states and 6903 transitions. [2021-08-12 20:01:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:01:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:16,931 INFO L225 Difference]: With dead ends: 2201 [2021-08-12 20:01:16,931 INFO L226 Difference]: Without dead ends: 2172 [2021-08-12 20:01:16,932 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:01:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-12 20:01:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-12 20:01:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 20:01:17,061 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 20:01:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:17,061 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 20:01:17,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 20:01:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:17,063 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:17,063 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:17,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:17,263 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:17,264 INFO L82 PathProgramCache]: Analyzing trace with hash -295781783, now seen corresponding path program 28 times [2021-08-12 20:01:17,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:17,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371537191] [2021-08-12 20:01:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:17,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:17,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371537191] [2021-08-12 20:01:17,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371537191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:17,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629438294] [2021-08-12 20:01:17,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:17,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:01:17,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:17,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:17,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629438294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:17,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:17,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:01:17,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880074120] [2021-08-12 20:01:17,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:01:17,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:01:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:01:17,413 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:18,748 INFO L93 Difference]: Finished difference Result 2224 states and 6951 transitions. [2021-08-12 20:01:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 20:01:18,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:18,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:18,752 INFO L225 Difference]: With dead ends: 2224 [2021-08-12 20:01:18,752 INFO L226 Difference]: Without dead ends: 2199 [2021-08-12 20:01:18,753 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:01:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-12 20:01:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-12 20:01:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-12 20:01:18,872 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-12 20:01:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:18,872 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-12 20:01:18,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-12 20:01:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:18,874 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:18,874 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:19,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:19,074 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:19,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:19,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1351159177, now seen corresponding path program 29 times [2021-08-12 20:01:19,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:19,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058889629] [2021-08-12 20:01:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:19,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:19,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058889629] [2021-08-12 20:01:19,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058889629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:19,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591291171] [2021-08-12 20:01:19,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:19,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:01:19,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:19,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:19,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:19,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591291171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:19,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:19,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:01:19,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127184408] [2021-08-12 20:01:19,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:01:19,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:19,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:01:19,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:01:19,205 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:20,553 INFO L93 Difference]: Finished difference Result 2181 states and 6845 transitions. [2021-08-12 20:01:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 20:01:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:20,558 INFO L225 Difference]: With dead ends: 2181 [2021-08-12 20:01:20,558 INFO L226 Difference]: Without dead ends: 2152 [2021-08-12 20:01:20,558 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:01:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-12 20:01:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-12 20:01:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 20:01:20,718 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 20:01:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:20,718 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 20:01:20,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 20:01:20,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:20,720 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:20,720 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:20,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-12 20:01:20,920 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1252113, now seen corresponding path program 30 times [2021-08-12 20:01:20,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:20,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334620471] [2021-08-12 20:01:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:20,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:20,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334620471] [2021-08-12 20:01:20,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334620471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:20,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289923170] [2021-08-12 20:01:20,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:20,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:01:20,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:21,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289923170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:21,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:21,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:01:21,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531489058] [2021-08-12 20:01:21,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:01:21,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:21,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:01:21,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:01:21,058 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:22,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:22,411 INFO L93 Difference]: Finished difference Result 2122 states and 6453 transitions. [2021-08-12 20:01:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 20:01:22,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:22,415 INFO L225 Difference]: With dead ends: 2122 [2021-08-12 20:01:22,416 INFO L226 Difference]: Without dead ends: 2097 [2021-08-12 20:01:22,416 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:01:22,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-12 20:01:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-12 20:01:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-12 20:01:22,548 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-12 20:01:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:22,548 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-12 20:01:22,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-12 20:01:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:22,550 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:22,550 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:22,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:22,750 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:22,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1073569087, now seen corresponding path program 31 times [2021-08-12 20:01:22,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:22,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907657432] [2021-08-12 20:01:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:22,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:22,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907657432] [2021-08-12 20:01:22,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907657432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:22,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203542635] [2021-08-12 20:01:22,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:22,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:22,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203542635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:22,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:22,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:01:22,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558547099] [2021-08-12 20:01:22,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:01:22,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:22,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:01:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:01:22,881 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:24,109 INFO L93 Difference]: Finished difference Result 1988 states and 6105 transitions. [2021-08-12 20:01:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 20:01:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:24,113 INFO L225 Difference]: With dead ends: 1988 [2021-08-12 20:01:24,113 INFO L226 Difference]: Without dead ends: 1959 [2021-08-12 20:01:24,114 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:01:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-12 20:01:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-12 20:01:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-12 20:01:24,283 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-12 20:01:24,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:24,283 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-12 20:01:24,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-12 20:01:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:24,285 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:24,285 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:24,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-12 20:01:24,486 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:24,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1960561683, now seen corresponding path program 32 times [2021-08-12 20:01:24,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:24,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235822110] [2021-08-12 20:01:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:24,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:24,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235822110] [2021-08-12 20:01:24,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235822110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:24,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740184220] [2021-08-12 20:01:24,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:24,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:01:24,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:24,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:24,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:24,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740184220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:24,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:24,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:01:24,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137514709] [2021-08-12 20:01:24,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:01:24,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:01:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:01:24,612 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:25,611 INFO L93 Difference]: Finished difference Result 1753 states and 5544 transitions. [2021-08-12 20:01:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:01:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:25,615 INFO L225 Difference]: With dead ends: 1753 [2021-08-12 20:01:25,615 INFO L226 Difference]: Without dead ends: 1716 [2021-08-12 20:01:25,616 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-12 20:01:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-12 20:01:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-12 20:01:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-12 20:01:25,748 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-12 20:01:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:25,749 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-12 20:01:25,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-12 20:01:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:25,750 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:25,750 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:25,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:25,951 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:25,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:25,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1288275347, now seen corresponding path program 33 times [2021-08-12 20:01:25,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:25,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399075713] [2021-08-12 20:01:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:25,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399075713] [2021-08-12 20:01:25,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399075713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:25,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778884195] [2021-08-12 20:01:25,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:26,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:01:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:26,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:26,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778884195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:26,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:26,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:01:26,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557388669] [2021-08-12 20:01:26,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:01:26,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:26,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:01:26,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:01:26,106 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:27,321 INFO L93 Difference]: Finished difference Result 1846 states and 5777 transitions. [2021-08-12 20:01:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 20:01:27,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:27,326 INFO L225 Difference]: With dead ends: 1846 [2021-08-12 20:01:27,326 INFO L226 Difference]: Without dead ends: 1821 [2021-08-12 20:01:27,326 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:01:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-12 20:01:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-12 20:01:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-12 20:01:27,474 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-12 20:01:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:27,474 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-12 20:01:27,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-12 20:01:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:27,477 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:27,477 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:27,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-12 20:01:27,677 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1951314555, now seen corresponding path program 34 times [2021-08-12 20:01:27,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:27,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489784831] [2021-08-12 20:01:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:27,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:27,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489784831] [2021-08-12 20:01:27,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489784831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:27,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414205444] [2021-08-12 20:01:27,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:27,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:01:27,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:27,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:27,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:27,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414205444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:27,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:27,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:01:27,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25550254] [2021-08-12 20:01:27,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:01:27,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:27,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:01:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:01:27,843 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:28,969 INFO L93 Difference]: Finished difference Result 1815 states and 5702 transitions. [2021-08-12 20:01:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:01:28,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:28,973 INFO L225 Difference]: With dead ends: 1815 [2021-08-12 20:01:28,973 INFO L226 Difference]: Without dead ends: 1786 [2021-08-12 20:01:28,973 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-12 20:01:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-12 20:01:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-12 20:01:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-12 20:01:29,123 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-12 20:01:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:29,123 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-12 20:01:29,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-12 20:01:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:01:29,125 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:29,125 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:29,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:29,326 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:29,326 INFO L82 PathProgramCache]: Analyzing trace with hash -860517803, now seen corresponding path program 35 times [2021-08-12 20:01:29,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:29,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364257378] [2021-08-12 20:01:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:29,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:29,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364257378] [2021-08-12 20:01:29,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364257378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:29,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543070209] [2021-08-12 20:01:29,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:29,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:01:29,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:29,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:01:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:29,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543070209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:29,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:29,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:01:29,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004453303] [2021-08-12 20:01:29,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:01:29,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:29,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:01:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:01:29,483 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:30,449 INFO L93 Difference]: Finished difference Result 1674 states and 5382 transitions. [2021-08-12 20:01:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:01:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:01:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:30,453 INFO L225 Difference]: With dead ends: 1674 [2021-08-12 20:01:30,454 INFO L226 Difference]: Without dead ends: 1637 [2021-08-12 20:01:30,454 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:01:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-12 20:01:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-12 20:01:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-12 20:01:30,641 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-12 20:01:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:30,642 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-12 20:01:30,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-12 20:01:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:30,644 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:30,644 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:30,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:30,865 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1270661831, now seen corresponding path program 4 times [2021-08-12 20:01:30,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:30,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684598725] [2021-08-12 20:01:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:31,408 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-08-12 20:01:31,624 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-08-12 20:01:31,860 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-08-12 20:01:32,093 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-08-12 20:01:32,233 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-08-12 20:01:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:32,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:32,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684598725] [2021-08-12 20:01:32,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684598725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:32,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773568237] [2021-08-12 20:01:32,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:32,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:01:32,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:32,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:01:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:01:32,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:01:32,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:01:32,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:01:32,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:01:32,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:01:32,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:01:32,939 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-08-12 20:01:32,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 10 [2021-08-12 20:01:32,955 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:01:32,965 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 22 [2021-08-12 20:01:32,974 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:01:32,984 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-08-12 20:01:32,993 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:32,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:32,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:01:33,001 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:33,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:33,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:33,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:33,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:01:33,009 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:33,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:33,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:01:33,014 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:33,094 INFO L628 ElimStorePlain]: treesize reduction 73, result has 47.5 percent of original size [2021-08-12 20:01:33,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:01:33,096 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-08-12 20:01:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:33,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773568237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:33,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:33,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:01:33,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909750983] [2021-08-12 20:01:33,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:01:33,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:01:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:01:33,161 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:33,517 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-08-12 20:01:33,977 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-08-12 20:01:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:34,949 INFO L93 Difference]: Finished difference Result 1519 states and 4957 transitions. [2021-08-12 20:01:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:01:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:01:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:34,953 INFO L225 Difference]: With dead ends: 1519 [2021-08-12 20:01:34,953 INFO L226 Difference]: Without dead ends: 1502 [2021-08-12 20:01:34,953 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2064.8ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:01:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-08-12 20:01:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-08-12 20:01:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-08-12 20:01:35,121 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-08-12 20:01:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:35,121 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-08-12 20:01:35,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-08-12 20:01:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:35,124 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:35,124 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:35,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:35,324 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash -757736185, now seen corresponding path program 5 times [2021-08-12 20:01:35,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:35,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910615673] [2021-08-12 20:01:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:35,655 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-08-12 20:01:35,794 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-08-12 20:01:35,916 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-08-12 20:01:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:36,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:36,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910615673] [2021-08-12 20:01:36,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910615673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:36,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991101258] [2021-08-12 20:01:36,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:36,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:01:36,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:36,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:01:36,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:36,734 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-08-12 20:01:36,789 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_5], 3=[v_prenex_9, v_prenex_7]} [2021-08-12 20:01:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:36,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:36,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:36,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:01:36,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:36,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:36,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:36,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-08-12 20:01:36,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:36,937 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-08-12 20:01:36,938 INFO L628 ElimStorePlain]: treesize reduction 73, result has 74.2 percent of original size [2021-08-12 20:01:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:36,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-08-12 20:01:36,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:36,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:37,003 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 20:01:37,003 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 54 [2021-08-12 20:01:37,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:37,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:37,055 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 20:01:37,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-08-12 20:01:37,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:37,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:37,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:01:37,096 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:322, output treesize:59 [2021-08-12 20:01:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:37,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991101258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:37,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:37,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:01:37,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527290783] [2021-08-12 20:01:37,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:01:37,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:37,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:01:37,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:01:37,193 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:37,674 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2021-08-12 20:01:37,939 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-08-12 20:01:38,195 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-08-12 20:01:38,389 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-08-12 20:01:38,550 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-08-12 20:01:38,764 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-08-12 20:01:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:39,901 INFO L93 Difference]: Finished difference Result 1565 states and 5079 transitions. [2021-08-12 20:01:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:01:39,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:01:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:39,905 INFO L225 Difference]: With dead ends: 1565 [2021-08-12 20:01:39,905 INFO L226 Difference]: Without dead ends: 1533 [2021-08-12 20:01:39,905 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2611.4ms TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:01:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-08-12 20:01:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1150. [2021-08-12 20:01:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-08-12 20:01:40,106 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-08-12 20:01:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:40,106 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-08-12 20:01:40,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-08-12 20:01:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:40,126 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:40,126 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:40,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:40,327 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:40,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:40,327 INFO L82 PathProgramCache]: Analyzing trace with hash 833693123, now seen corresponding path program 36 times [2021-08-12 20:01:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:40,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084855457] [2021-08-12 20:01:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:40,752 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-08-12 20:01:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:40,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:40,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084855457] [2021-08-12 20:01:40,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084855457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:40,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305028061] [2021-08-12 20:01:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:40,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:01:40,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:40,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:01:40,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:41,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-08-12 20:01:41,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,787 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 55 treesize of output 24 [2021-08-12 20:01:41,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-08-12 20:01:41,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,807 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 64 treesize of output 24 [2021-08-12 20:01:41,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,817 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 44 treesize of output 14 [2021-08-12 20:01:41,818 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,827 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 56 treesize of output 28 [2021-08-12 20:01:41,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,837 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 43 treesize of output 23 [2021-08-12 20:01:41,837 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-08-12 20:01:41,847 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:01:41,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-08-12 20:01:41,869 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:01:41,878 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,886 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 45 treesize of output 23 [2021-08-12 20:01:41,887 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-08-12 20:01:41,896 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-08-12 20:01:41,905 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,913 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 52 treesize of output 28 [2021-08-12 20:01:41,913 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:41,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:41,919 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 44 treesize of output 18 [2021-08-12 20:01:41,920 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,945 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-08-12 20:01:41,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:01:41,946 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-08-12 20:01:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:41,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305028061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:41,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:41,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 20:01:41,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009235687] [2021-08-12 20:01:41,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:01:41,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:01:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:01:41,977 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 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) [2021-08-12 20:01:42,522 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-08-12 20:01:42,781 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-08-12 20:01:43,529 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-08-12 20:01:43,717 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-08-12 20:01:43,897 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-08-12 20:01:44,387 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-08-12 20:01:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:45,199 INFO L93 Difference]: Finished difference Result 1617 states and 5218 transitions. [2021-08-12 20:01:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:01:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:01:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:45,205 INFO L225 Difference]: With dead ends: 1617 [2021-08-12 20:01:45,205 INFO L226 Difference]: Without dead ends: 1600 [2021-08-12 20:01:45,206 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2525.7ms TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 20:01:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-08-12 20:01:45,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1180. [2021-08-12 20:01:45,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-08-12 20:01:45,410 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-08-12 20:01:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:45,411 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-08-12 20:01:45,411 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) [2021-08-12 20:01:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-08-12 20:01:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:45,413 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:45,413 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:45,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-12 20:01:45,614 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1638740299, now seen corresponding path program 6 times [2021-08-12 20:01:45,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:45,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387353119] [2021-08-12 20:01:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:45,862 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-08-12 20:01:45,988 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-08-12 20:01:46,342 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-08-12 20:01:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:46,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:46,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387353119] [2021-08-12 20:01:46,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387353119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:46,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363171853] [2021-08-12 20:01:46,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:46,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:01:46,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:46,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:01:46,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:46,885 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-08-12 20:01:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:46,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:46,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:01:46,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:47,093 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-08-12 20:01:47,093 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.6 percent of original size [2021-08-12 20:01:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:47,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:47,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-08-12 20:01:47,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:47,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:47,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-12 20:01:47,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:47,192 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.8 percent of original size [2021-08-12 20:01:47,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:47,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:47,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-08-12 20:01:47,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:47,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:47,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:47,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:01:47,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:47,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:01:47,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:01:47,286 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-08-12 20:01:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:47,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363171853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:47,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:47,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:01:47,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139294404] [2021-08-12 20:01:47,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:01:47,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:47,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:01:47,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:01:47,399 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:47,601 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-08-12 20:01:48,296 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-08-12 20:01:48,481 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-08-12 20:01:49,064 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-08-12 20:01:49,256 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-08-12 20:01:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:50,009 INFO L93 Difference]: Finished difference Result 1622 states and 5227 transitions. [2021-08-12 20:01:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:01:50,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:01:50,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:50,013 INFO L225 Difference]: With dead ends: 1622 [2021-08-12 20:01:50,013 INFO L226 Difference]: Without dead ends: 1605 [2021-08-12 20:01:50,014 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2274.9ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:01:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-12 20:01:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1189. [2021-08-12 20:01:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-08-12 20:01:50,230 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-08-12 20:01:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:50,230 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-08-12 20:01:50,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-08-12 20:01:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:50,233 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:50,233 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:50,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:50,448 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:50,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1105845433, now seen corresponding path program 37 times [2021-08-12 20:01:50,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:50,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201438046] [2021-08-12 20:01:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:50,852 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-08-12 20:01:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:51,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:51,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201438046] [2021-08-12 20:01:51,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201438046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:51,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781524937] [2021-08-12 20:01:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:51,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:01:51,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:51,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,843 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 44 treesize of output 14 [2021-08-12 20:01:51,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-08-12 20:01:51,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 24 [2021-08-12 20:01:51,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-08-12 20:01:51,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-08-12 20:01:51,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-08-12 20:01:51,905 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 24 [2021-08-12 20:01:51,919 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,929 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 38 treesize of output 20 [2021-08-12 20:01:51,930 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,941 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 64 treesize of output 24 [2021-08-12 20:01:51,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:01:51,953 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2021-08-12 20:01:51,966 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,976 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 51 treesize of output 25 [2021-08-12 20:01:51,977 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 18 [2021-08-12 20:01:51,988 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:51,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:51,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 23 [2021-08-12 20:01:51,997 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:52,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:52,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:52,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:52,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:52,004 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 40 treesize of output 20 [2021-08-12 20:01:52,005 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:01:52,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:52,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:01:52,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:01:52,010 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:52,051 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-08-12 20:01:52,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:01:52,053 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-08-12 20:01:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:52,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781524937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:52,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:52,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:01:52,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236733260] [2021-08-12 20:01:52,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:01:52,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:52,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:01:52,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:01:52,089 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:52,633 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-08-12 20:01:53,207 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 58 [2021-08-12 20:01:53,526 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-08-12 20:01:54,614 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-08-12 20:01:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:01:55,602 INFO L93 Difference]: Finished difference Result 1802 states and 5749 transitions. [2021-08-12 20:01:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 20:01:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:01:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:01:55,606 INFO L225 Difference]: With dead ends: 1802 [2021-08-12 20:01:55,606 INFO L226 Difference]: Without dead ends: 1785 [2021-08-12 20:01:55,606 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2464.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 20:01:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-08-12 20:01:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1201. [2021-08-12 20:01:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-08-12 20:01:55,818 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-08-12 20:01:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:01:55,818 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-08-12 20:01:55,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:01:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-08-12 20:01:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:01:55,820 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:01:55,820 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:01:56,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-08-12 20:01:56,021 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:01:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:01:56,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2082164277, now seen corresponding path program 38 times [2021-08-12 20:01:56,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:01:56,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580010767] [2021-08-12 20:01:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:01:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:01:56,490 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-08-12 20:01:56,642 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-08-12 20:01:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:56,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:01:56,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580010767] [2021-08-12 20:01:56,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580010767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:56,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059879076] [2021-08-12 20:01:56,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:01:56,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:01:56,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:01:56,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 20:01:56,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:01:57,397 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-08-12 20:01:57,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 51 [2021-08-12 20:01:57,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:57,443 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-08-12 20:01:57,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 37 [2021-08-12 20:01:57,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:57,527 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-08-12 20:01:57,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 59 [2021-08-12 20:01:57,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:57,595 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-08-12 20:01:57,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-08-12 20:01:57,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:57,653 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-08-12 20:01:57,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 41 [2021-08-12 20:01:57,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-08-12 20:01:57,723 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-08-12 20:01:57,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 41 [2021-08-12 20:01:57,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:57,793 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-08-12 20:01:57,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-08-12 20:01:57,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:57,886 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-08-12 20:01:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 68 [2021-08-12 20:01:57,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:57,987 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-08-12 20:01:57,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 34 [2021-08-12 20:01:57,989 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:58,053 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-08-12 20:01:58,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 52 [2021-08-12 20:01:58,058 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:58,089 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-08-12 20:01:58,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 1 [2021-08-12 20:01:58,090 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:58,120 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-08-12 20:01:58,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 1 [2021-08-12 20:01:58,121 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:58,181 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-08-12 20:01:58,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 46 [2021-08-12 20:01:58,186 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:58,230 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-08-12 20:01:58,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 33 [2021-08-12 20:01:58,232 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:58,257 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-08-12 20:01:58,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-08-12 20:01:58,258 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:58,300 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-08-12 20:01:58,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-08-12 20:01:58,311 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:01:58,981 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 81 [2021-08-12 20:01:58,982 INFO L628 ElimStorePlain]: treesize reduction 410, result has 49.9 percent of original size [2021-08-12 20:01:58,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:01:58,988 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1105, output treesize:408 [2021-08-12 20:01:59,220 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-08-12 20:01:59,439 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-08-12 20:01:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:01:59,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059879076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:01:59,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:01:59,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 20:01:59,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641014460] [2021-08-12 20:01:59,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 20:01:59,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:01:59,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 20:01:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-12 20:01:59,553 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:00,050 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-08-12 20:02:00,699 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-08-12 20:02:00,959 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-08-12 20:02:01,418 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-08-12 20:02:02,366 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 64 [2021-08-12 20:02:02,521 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-08-12 20:02:02,901 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 51 [2021-08-12 20:02:03,564 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-08-12 20:02:04,240 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-08-12 20:02:04,606 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-08-12 20:02:04,908 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-08-12 20:02:05,882 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 113 [2021-08-12 20:02:06,890 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 106 [2021-08-12 20:02:07,591 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 112 [2021-08-12 20:02:08,152 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 95 [2021-08-12 20:02:09,171 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 105 [2021-08-12 20:02:09,366 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-08-12 20:02:09,788 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-08-12 20:02:10,000 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-08-12 20:02:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:10,412 INFO L93 Difference]: Finished difference Result 2412 states and 7514 transitions. [2021-08-12 20:02:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-12 20:02:10,412 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:02:10,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:10,417 INFO L225 Difference]: With dead ends: 2412 [2021-08-12 20:02:10,417 INFO L226 Difference]: Without dead ends: 2365 [2021-08-12 20:02:10,418 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 9479.2ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-08-12 20:02:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-08-12 20:02:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1341. [2021-08-12 20:02:10,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3007462686567166) internal successors, (4423), 1340 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4423 transitions. [2021-08-12 20:02:10,698 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4423 transitions. Word has length 26 [2021-08-12 20:02:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:10,698 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4423 transitions. [2021-08-12 20:02:10,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4423 transitions. [2021-08-12 20:02:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:10,700 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:10,700 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:10,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:10,901 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash 127735791, now seen corresponding path program 7 times [2021-08-12 20:02:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:10,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325354835] [2021-08-12 20:02:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:11,254 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-08-12 20:02:11,452 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-08-12 20:02:11,640 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-08-12 20:02:11,860 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-08-12 20:02:11,995 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-08-12 20:02:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:12,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:12,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325354835] [2021-08-12 20:02:12,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325354835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:12,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109270225] [2021-08-12 20:02:12,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:12,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:02:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:02:12,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:02:12,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:02:12,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:02:12,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:02:12,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 16 [2021-08-12 20:02:12,636 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:02:12,645 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:02:12,653 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:02:12,661 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:02:12,669 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 10 [2021-08-12 20:02:12,677 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-08-12 20:02:12,689 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:02:12,699 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:02:12,707 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-08-12 20:02:12,714 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:12,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:02:12,720 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:12,786 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-08-12 20:02:12,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:02:12,789 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-08-12 20:02:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:12,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109270225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:12,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:12,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:02:12,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49819915] [2021-08-12 20:02:12,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:02:12,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:12,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:02:12,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:02:12,836 INFO L87 Difference]: Start difference. First operand 1341 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:13,565 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-08-12 20:02:13,834 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-08-12 20:02:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:15,275 INFO L93 Difference]: Finished difference Result 1738 states and 5614 transitions. [2021-08-12 20:02:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:02:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:02:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:15,280 INFO L225 Difference]: With dead ends: 1738 [2021-08-12 20:02:15,280 INFO L226 Difference]: Without dead ends: 1721 [2021-08-12 20:02:15,281 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2098.6ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:02:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-08-12 20:02:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1352. [2021-08-12 20:02:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.298297557364915) internal successors, (4456), 1351 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4456 transitions. [2021-08-12 20:02:15,565 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4456 transitions. Word has length 26 [2021-08-12 20:02:15,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:15,565 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4456 transitions. [2021-08-12 20:02:15,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4456 transitions. [2021-08-12 20:02:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:15,567 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:15,567 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:15,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-08-12 20:02:15,768 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:15,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1900662225, now seen corresponding path program 8 times [2021-08-12 20:02:15,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:15,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013644779] [2021-08-12 20:02:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:16,014 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-08-12 20:02:16,136 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-08-12 20:02:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:16,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:16,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013644779] [2021-08-12 20:02:16,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013644779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:16,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263133262] [2021-08-12 20:02:16,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:16,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:02:16,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:02:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:16,856 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-08-12 20:02:16,973 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:02:16,974 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-08-12 20:02:16,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:17,145 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-08-12 20:02:17,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:17,181 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 20:02:17,181 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 75 [2021-08-12 20:02:17,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:17,353 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-08-12 20:02:17,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:17,376 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:02:17,377 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-08-12 20:02:17,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:17,548 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-08-12 20:02:17,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:17,570 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-12 20:02:17,570 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2021-08-12 20:02:17,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:17,739 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-08-12 20:02:17,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:17,786 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:02:17,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-08-12 20:02:17,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:17,948 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-08-12 20:02:17,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:17,982 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 20:02:17,982 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2021-08-12 20:02:17,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,290 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2021-08-12 20:02:18,291 INFO L628 ElimStorePlain]: treesize reduction 16, result has 96.2 percent of original size [2021-08-12 20:02:18,311 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:02:18,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-08-12 20:02:18,314 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,600 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-08-12 20:02:18,601 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-08-12 20:02:18,621 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:02:18,622 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-08-12 20:02:18,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:18,762 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-08-12 20:02:18,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:18,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:02:18,790 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:743, output treesize:480 [2021-08-12 20:02:19,058 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-08-12 20:02:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:19,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263133262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:19,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:19,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:02:19,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549932860] [2021-08-12 20:02:19,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:02:19,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:19,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:02:19,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:02:19,271 INFO L87 Difference]: Start difference. First operand 1352 states and 4456 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:20,098 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-08-12 20:02:20,582 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-08-12 20:02:20,757 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-08-12 20:02:20,984 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2021-08-12 20:02:21,349 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-08-12 20:02:21,541 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-08-12 20:02:21,783 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-08-12 20:02:21,948 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-08-12 20:02:22,267 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-08-12 20:02:22,480 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-08-12 20:02:22,833 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-08-12 20:02:23,408 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-08-12 20:02:23,890 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2021-08-12 20:02:24,429 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-08-12 20:02:25,047 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-08-12 20:02:25,608 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-08-12 20:02:26,172 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-08-12 20:02:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:26,962 INFO L93 Difference]: Finished difference Result 2042 states and 6416 transitions. [2021-08-12 20:02:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:02:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:02:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:26,967 INFO L225 Difference]: With dead ends: 2042 [2021-08-12 20:02:26,967 INFO L226 Difference]: Without dead ends: 2025 [2021-08-12 20:02:26,967 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 6447.7ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 20:02:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-08-12 20:02:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1363. [2021-08-12 20:02:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.3069016152716593) internal successors, (4504), 1362 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4504 transitions. [2021-08-12 20:02:27,269 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4504 transitions. Word has length 26 [2021-08-12 20:02:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:27,269 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4504 transitions. [2021-08-12 20:02:27,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4504 transitions. [2021-08-12 20:02:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:27,271 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:27,271 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:27,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-08-12 20:02:27,472 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:27,472 INFO L82 PathProgramCache]: Analyzing trace with hash 456895363, now seen corresponding path program 9 times [2021-08-12 20:02:27,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:27,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891491954] [2021-08-12 20:02:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:27,806 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-08-12 20:02:27,942 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-08-12 20:02:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:28,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:28,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891491954] [2021-08-12 20:02:28,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891491954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:28,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544004925] [2021-08-12 20:02:28,173 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 [2021-08-12 20:02:28,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:02:28,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:28,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 20:02:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:28,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:28,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:28,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:02:28,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:29,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:29,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:02:29,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:29,197 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-08-12 20:02:29,197 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-08-12 20:02:29,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:29,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:29,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 10 [2021-08-12 20:02:29,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:29,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:29,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:02:29,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:29,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:29,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:29,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:29,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:29,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:02:29,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:29,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:29,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:29,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-08-12 20:02:29,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:29,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:29,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:02:29,423 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-08-12 20:02:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:29,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544004925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:29,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:29,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:02:29,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421738915] [2021-08-12 20:02:29,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:02:29,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:29,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:02:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:02:29,496 INFO L87 Difference]: Start difference. First operand 1363 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:29,708 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-08-12 20:02:30,402 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-08-12 20:02:30,621 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-08-12 20:02:30,955 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-08-12 20:02:31,408 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-08-12 20:02:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:32,497 INFO L93 Difference]: Finished difference Result 1595 states and 5154 transitions. [2021-08-12 20:02:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:02:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:02:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:32,501 INFO L225 Difference]: With dead ends: 1595 [2021-08-12 20:02:32,501 INFO L226 Difference]: Without dead ends: 1578 [2021-08-12 20:02:32,501 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2543.3ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:02:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-08-12 20:02:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1372. [2021-08-12 20:02:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-08-12 20:02:32,820 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-08-12 20:02:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:32,820 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-08-12 20:02:32,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-08-12 20:02:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:32,822 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:32,822 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:33,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:33,023 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash 289086271, now seen corresponding path program 10 times [2021-08-12 20:02:33,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:33,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757032338] [2021-08-12 20:02:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:33,430 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-08-12 20:02:33,599 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-08-12 20:02:33,753 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-08-12 20:02:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:34,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757032338] [2021-08-12 20:02:34,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757032338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719346742] [2021-08-12 20:02:34,000 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 [2021-08-12 20:02:34,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:02:34,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:02:34,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:34,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:02:34,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 22 [2021-08-12 20:02:34,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:02:34,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 10 [2021-08-12 20:02:34,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:02:34,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:02:34,534 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:02:34,541 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:02:34,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:02:34,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 26 [2021-08-12 20:02:34,565 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:02:34,572 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:02:34,578 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:02:34,585 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:02:34,591 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:02:34,598 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:34,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:34,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:02:34,602 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:34,668 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-08-12 20:02:34,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:02:34,670 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-08-12 20:02:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:34,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719346742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:34,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:34,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 20:02:34,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105010543] [2021-08-12 20:02:34,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:02:34,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:34,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:02:34,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:02:34,723 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:35,132 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-08-12 20:02:35,425 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-08-12 20:02:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:36,869 INFO L93 Difference]: Finished difference Result 1676 states and 5469 transitions. [2021-08-12 20:02:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:02:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:02:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:36,873 INFO L225 Difference]: With dead ends: 1676 [2021-08-12 20:02:36,873 INFO L226 Difference]: Without dead ends: 1659 [2021-08-12 20:02:36,874 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1676.6ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-12 20:02:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-08-12 20:02:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1372. [2021-08-12 20:02:37,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-08-12 20:02:37,192 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-08-12 20:02:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:37,193 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-08-12 20:02:37,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-08-12 20:02:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:37,195 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:37,195 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:37,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:37,396 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1778429757, now seen corresponding path program 11 times [2021-08-12 20:02:37,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:37,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445417037] [2021-08-12 20:02:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:37,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:37,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445417037] [2021-08-12 20:02:37,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445417037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:37,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424378186] [2021-08-12 20:02:37,926 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 [2021-08-12 20:02:37,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:02:37,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:02:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:38,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:38,586 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:02:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 29 [2021-08-12 20:02:38,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:38,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:38,642 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:02:38,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-08-12 20:02:38,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:38,874 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-08-12 20:02:38,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:38,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:38,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:38,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 39 [2021-08-12 20:02:38,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:38,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:38,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:38,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 42 [2021-08-12 20:02:38,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:39,101 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-08-12 20:02:39,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:39,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:39,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:39,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-08-12 20:02:39,126 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:39,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:39,146 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:02:39,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-08-12 20:02:39,155 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:39,328 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-08-12 20:02:39,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:39,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:39,351 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:02:39,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-08-12 20:02:39,352 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:39,372 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:02:39,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-08-12 20:02:39,374 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:39,537 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-08-12 20:02:39,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:39,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:02:39,570 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:401, output treesize:389 [2021-08-12 20:02:39,776 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-08-12 20:02:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:39,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424378186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:39,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:39,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:02:39,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412650189] [2021-08-12 20:02:39,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:02:39,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:02:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:02:39,870 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:40,355 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-08-12 20:02:40,524 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2021-08-12 20:02:40,896 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-08-12 20:02:41,206 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-08-12 20:02:41,555 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-08-12 20:02:41,960 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2021-08-12 20:02:42,112 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-08-12 20:02:42,539 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2021-08-12 20:02:42,748 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-08-12 20:02:43,224 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-08-12 20:02:43,989 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-08-12 20:02:44,605 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-08-12 20:02:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:45,840 INFO L93 Difference]: Finished difference Result 2313 states and 7399 transitions. [2021-08-12 20:02:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 20:02:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:02:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:45,846 INFO L225 Difference]: With dead ends: 2313 [2021-08-12 20:02:45,846 INFO L226 Difference]: Without dead ends: 2281 [2021-08-12 20:02:45,846 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 4261.1ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 20:02:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-08-12 20:02:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1375. [2021-08-12 20:02:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.3151382823871907) internal successors, (4555), 1374 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4555 transitions. [2021-08-12 20:02:46,198 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4555 transitions. Word has length 26 [2021-08-12 20:02:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:46,198 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4555 transitions. [2021-08-12 20:02:46,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4555 transitions. [2021-08-12 20:02:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:46,200 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:46,201 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:46,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-08-12 20:02:46,401 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:46,402 INFO L82 PathProgramCache]: Analyzing trace with hash -746246473, now seen corresponding path program 12 times [2021-08-12 20:02:46,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:46,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715694923] [2021-08-12 20:02:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:46,689 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-08-12 20:02:46,835 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-08-12 20:02:46,970 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-08-12 20:02:47,100 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-08-12 20:02:47,226 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-08-12 20:02:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:47,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:47,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715694923] [2021-08-12 20:02:47,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715694923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:47,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942631542] [2021-08-12 20:02:47,261 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 [2021-08-12 20:02:47,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:02:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:02:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 20:02:47,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:47,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,590 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-08-12 20:02:47,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:47,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-08-12 20:02:47,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,624 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:02:47,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-08-12 20:02:47,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-08-12 20:02:47,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,672 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-08-12 20:02:47,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-08-12 20:02:47,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,700 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-08-12 20:02:47,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,716 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-12 20:02:47,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-08-12 20:02:47,717 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,731 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-08-12 20:02:47,732 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,745 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-08-12 20:02:47,746 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-08-12 20:02:47,759 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,771 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-08-12 20:02:47,772 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:47,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-08-12 20:02:47,790 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:47,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-08-12 20:02:47,805 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,816 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-08-12 20:02:47,817 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:02:47,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:47,824 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:02:47,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-08-12 20:02:47,825 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:47,942 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-08-12 20:02:47,942 INFO L628 ElimStorePlain]: treesize reduction 54, result has 61.4 percent of original size [2021-08-12 20:02:47,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:02:47,943 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-08-12 20:02:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:48,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942631542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:48,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:48,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 20:02:48,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572031032] [2021-08-12 20:02:48,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:02:48,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:48,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:02:48,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:02:48,095 INFO L87 Difference]: Start difference. First operand 1375 states and 4555 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:48,822 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-08-12 20:02:49,077 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-08-12 20:02:49,314 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-08-12 20:02:49,450 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-08-12 20:02:49,716 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-08-12 20:02:50,118 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-08-12 20:02:50,455 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-08-12 20:02:50,884 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-08-12 20:02:51,024 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-08-12 20:02:51,582 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-08-12 20:02:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:52,278 INFO L93 Difference]: Finished difference Result 1792 states and 5833 transitions. [2021-08-12 20:02:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:02:52,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:02:52,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:52,283 INFO L225 Difference]: With dead ends: 1792 [2021-08-12 20:02:52,283 INFO L226 Difference]: Without dead ends: 1775 [2021-08-12 20:02:52,283 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 3114.1ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 20:02:52,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-08-12 20:02:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1378. [2021-08-12 20:02:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.316630355846042) internal successors, (4567), 1377 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4567 transitions. [2021-08-12 20:02:52,631 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4567 transitions. Word has length 26 [2021-08-12 20:02:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:52,631 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4567 transitions. [2021-08-12 20:02:52,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4567 transitions. [2021-08-12 20:02:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:52,633 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:52,633 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:52,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:52,834 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:52,834 INFO L82 PathProgramCache]: Analyzing trace with hash 148423883, now seen corresponding path program 13 times [2021-08-12 20:02:52,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:52,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929130102] [2021-08-12 20:02:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:53,041 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-08-12 20:02:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:53,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:02:53,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929130102] [2021-08-12 20:02:53,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929130102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:53,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840912556] [2021-08-12 20:02:53,362 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 [2021-08-12 20:02:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:02:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:02:53,915 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-08-12 20:02:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:53,990 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:02:53,991 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-08-12 20:02:53,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:54,015 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-12 20:02:54,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 57 [2021-08-12 20:02:54,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:54,204 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-08-12 20:02:54,204 INFO L628 ElimStorePlain]: treesize reduction 211, result has 55.7 percent of original size [2021-08-12 20:02:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:54,211 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 24 treesize of output 16 [2021-08-12 20:02:54,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:54,230 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-12 20:02:54,231 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 50 [2021-08-12 20:02:54,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:54,332 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.4 percent of original size [2021-08-12 20:02:54,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:54,342 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-12 20:02:54,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 30 [2021-08-12 20:02:54,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:54,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:02:54,403 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-12 20:02:54,403 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 53 [2021-08-12 20:02:54,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:02:54,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:02:54,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:02:54,442 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:619, output treesize:64 [2021-08-12 20:02:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:02:54,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840912556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:02:54,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:02:54,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:02:54,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179127650] [2021-08-12 20:02:54,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:02:54,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:02:54,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:02:54,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:02:54,515 INFO L87 Difference]: Start difference. First operand 1378 states and 4567 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:54,832 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-08-12 20:02:55,360 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-08-12 20:02:56,065 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-08-12 20:02:56,301 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-08-12 20:02:56,805 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-08-12 20:02:57,177 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-08-12 20:02:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:02:58,707 INFO L93 Difference]: Finished difference Result 2166 states and 6835 transitions. [2021-08-12 20:02:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:02:58,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:02:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:02:58,713 INFO L225 Difference]: With dead ends: 2166 [2021-08-12 20:02:58,713 INFO L226 Difference]: Without dead ends: 2149 [2021-08-12 20:02:58,713 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2538.1ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:02:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-08-12 20:02:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2021-08-12 20:02:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-08-12 20:02:59,068 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-08-12 20:02:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:02:59,068 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-08-12 20:02:59,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:02:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-08-12 20:02:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:02:59,070 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:02:59,070 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:02:59,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:02:59,270 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:02:59,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:02:59,271 INFO L82 PathProgramCache]: Analyzing trace with hash -806418041, now seen corresponding path program 39 times [2021-08-12 20:02:59,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:02:59,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238917927] [2021-08-12 20:02:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:02:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:02:59,758 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-08-12 20:03:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:00,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:00,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238917927] [2021-08-12 20:03:00,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238917927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:00,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510623868] [2021-08-12 20:03:00,068 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:00,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:03:00,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:00,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 20:03:00,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,467 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 42 treesize of output 20 [2021-08-12 20:03:00,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,479 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 49 treesize of output 23 [2021-08-12 20:03:00,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,491 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 50 treesize of output 18 [2021-08-12 20:03:00,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-08-12 20:03:00,504 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,515 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 44 treesize of output 20 [2021-08-12 20:03:00,516 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,528 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 45 treesize of output 18 [2021-08-12 20:03:00,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,541 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 51 treesize of output 25 [2021-08-12 20:03:00,542 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,554 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 38 treesize of output 12 [2021-08-12 20:03:00,555 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,567 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 43 treesize of output 18 [2021-08-12 20:03:00,568 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,580 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 62 treesize of output 28 [2021-08-12 20:03:00,580 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,591 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 49 treesize of output 23 [2021-08-12 20:03:00,592 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,603 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 48 treesize of output 14 [2021-08-12 20:03:00,604 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,615 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 61 treesize of output 24 [2021-08-12 20:03:00,615 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,625 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 57 treesize of output 25 [2021-08-12 20:03:00,626 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,636 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 57 treesize of output 24 [2021-08-12 20:03:00,637 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:00,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:00,643 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 58 treesize of output 28 [2021-08-12 20:03:00,644 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:00,703 INFO L628 ElimStorePlain]: treesize reduction 50, result has 49.5 percent of original size [2021-08-12 20:03:00,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:03:00,705 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:49 [2021-08-12 20:03:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:00,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510623868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:00,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:00,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-12 20:03:00,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418608978] [2021-08-12 20:03:00,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 20:03:00,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 20:03:00,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:03:00,824 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:01,312 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-08-12 20:03:01,784 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2021-08-12 20:03:02,312 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-08-12 20:03:03,080 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-08-12 20:03:05,526 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-08-12 20:03:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:07,402 INFO L93 Difference]: Finished difference Result 3159 states and 9704 transitions. [2021-08-12 20:03:07,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 20:03:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:03:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:07,409 INFO L225 Difference]: With dead ends: 3159 [2021-08-12 20:03:07,409 INFO L226 Difference]: Without dead ends: 2991 [2021-08-12 20:03:07,410 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3845.5ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 20:03:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-08-12 20:03:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1413. [2021-08-12 20:03:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3208215297450425) internal successors, (4689), 1412 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4689 transitions. [2021-08-12 20:03:07,813 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4689 transitions. Word has length 26 [2021-08-12 20:03:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:07,813 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4689 transitions. [2021-08-12 20:03:07,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:07,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4689 transitions. [2021-08-12 20:03:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:07,816 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:07,816 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:08,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:08,016 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1738294259, now seen corresponding path program 14 times [2021-08-12 20:03:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:08,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844215264] [2021-08-12 20:03:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:08,238 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-08-12 20:03:08,415 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-08-12 20:03:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:08,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:08,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844215264] [2021-08-12 20:03:08,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844215264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:08,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784144691] [2021-08-12 20:03:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:08,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:03:08,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:03:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:09,105 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-08-12 20:03:09,509 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2021-08-12 20:03:09,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:09,777 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-08-12 20:03:09,777 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 89 [2021-08-12 20:03:09,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:09,797 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-12 20:03:09,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 1 [2021-08-12 20:03:09,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:10,365 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 197 [2021-08-12 20:03:10,366 INFO L628 ElimStorePlain]: treesize reduction 788, result has 46.3 percent of original size [2021-08-12 20:03:10,392 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:03:10,392 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 62 treesize of output 52 [2021-08-12 20:03:10,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:10,563 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-08-12 20:03:10,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:10,597 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-12 20:03:10,597 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 69 [2021-08-12 20:03:10,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:10,768 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-08-12 20:03:10,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:10,793 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:03:10,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 62 [2021-08-12 20:03:10,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:10,994 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-08-12 20:03:10,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:11,015 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-12 20:03:11,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 55 [2021-08-12 20:03:11,017 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:11,187 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-08-12 20:03:11,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:11,213 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 20:03:11,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-08-12 20:03:11,217 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:11,381 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-08-12 20:03:11,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:11,420 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-12 20:03:11,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 72 [2021-08-12 20:03:11,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:11,585 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 20:03:11,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:11,614 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-12 20:03:11,614 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-08-12 20:03:11,616 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:11,768 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-08-12 20:03:11,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:11,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:03:11,798 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1661, output treesize:498 [2021-08-12 20:03:12,046 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-08-12 20:03:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:12,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784144691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:12,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:12,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-12 20:03:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348751265] [2021-08-12 20:03:12,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:03:12,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:12,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:03:12,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:03:12,145 INFO L87 Difference]: Start difference. First operand 1413 states and 4689 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:12,777 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-08-12 20:03:12,982 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-08-12 20:03:13,144 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-08-12 20:03:13,457 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-08-12 20:03:13,736 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-08-12 20:03:13,916 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-08-12 20:03:14,168 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-08-12 20:03:14,606 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2021-08-12 20:03:15,346 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-08-12 20:03:17,230 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 277 DAG size of output: 259 [2021-08-12 20:03:17,906 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2021-08-12 20:03:18,535 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-08-12 20:03:19,256 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112 [2021-08-12 20:03:21,373 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 274 DAG size of output: 258 [2021-08-12 20:03:23,302 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 303 DAG size of output: 279 [2021-08-12 20:03:24,225 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-08-12 20:03:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:26,023 INFO L93 Difference]: Finished difference Result 2108 states and 6750 transitions. [2021-08-12 20:03:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:03:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:03:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:26,027 INFO L225 Difference]: With dead ends: 2108 [2021-08-12 20:03:26,027 INFO L226 Difference]: Without dead ends: 2091 [2021-08-12 20:03:26,028 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 11409.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 20:03:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-08-12 20:03:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1409. [2021-08-12 20:03:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-08-12 20:03:26,429 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-08-12 20:03:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:26,430 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-08-12 20:03:26,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-08-12 20:03:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:26,432 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:26,432 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:26,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-08-12 20:03:26,632 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash 120761479, now seen corresponding path program 15 times [2021-08-12 20:03:26,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:26,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377717369] [2021-08-12 20:03:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:27,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:27,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377717369] [2021-08-12 20:03:27,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377717369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:27,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314912783] [2021-08-12 20:03:27,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:27,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:03:27,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:03:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:27,561 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-08-12 20:03:27,645 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_80, v_prenex_87, v_prenex_85, v_prenex_78], 6=[v_prenex_83, A, v_prenex_76, v_prenex_89]} [2021-08-12 20:03:27,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:27,663 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:03:27,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-12 20:03:27,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:28,033 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 153 [2021-08-12 20:03:28,034 INFO L628 ElimStorePlain]: treesize reduction 413, result has 53.5 percent of original size [2021-08-12 20:03:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:28,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-08-12 20:03:28,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:28,195 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-08-12 20:03:28,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:28,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-08-12 20:03:28,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:28,350 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-08-12 20:03:28,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:28,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-08-12 20:03:28,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:28,501 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-08-12 20:03:28,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,518 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:03:28,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-08-12 20:03:28,520 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:28,650 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-08-12 20:03:28,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:28,672 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-08-12 20:03:28,672 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-08-12 20:03:28,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:28,795 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-08-12 20:03:28,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:28,817 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-08-12 20:03:28,817 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-08-12 20:03:28,819 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:28,936 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-08-12 20:03:28,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:28,950 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-08-12 20:03:28,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2021-08-12 20:03:28,952 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:29,062 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-08-12 20:03:29,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:03:29,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:03:29,070 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:903, output treesize:216 [2021-08-12 20:03:29,218 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-08-12 20:03:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:29,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314912783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:29,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:29,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:03:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299888573] [2021-08-12 20:03:29,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:03:29,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:03:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:03:29,302 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:29,699 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-08-12 20:03:29,964 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-08-12 20:03:30,115 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-08-12 20:03:31,264 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-08-12 20:03:31,598 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-08-12 20:03:31,783 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-08-12 20:03:32,759 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2021-08-12 20:03:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:35,007 INFO L93 Difference]: Finished difference Result 2322 states and 7314 transitions. [2021-08-12 20:03:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:03:35,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:03:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:35,012 INFO L225 Difference]: With dead ends: 2322 [2021-08-12 20:03:35,012 INFO L226 Difference]: Without dead ends: 2305 [2021-08-12 20:03:35,013 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3541.1ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 20:03:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-08-12 20:03:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1409. [2021-08-12 20:03:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-08-12 20:03:35,433 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-08-12 20:03:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:35,433 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-08-12 20:03:35,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-08-12 20:03:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:35,435 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:35,435 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:35,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-08-12 20:03:35,636 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash 395894327, now seen corresponding path program 40 times [2021-08-12 20:03:35,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:35,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023322452] [2021-08-12 20:03:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:36,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:36,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023322452] [2021-08-12 20:03:36,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023322452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:36,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678327287] [2021-08-12 20:03:36,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:36,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:03:36,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:03:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:37,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 31 [2021-08-12 20:03:37,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2021-08-12 20:03:37,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-08-12 20:03:37,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-08-12 20:03:37,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 31 [2021-08-12 20:03:37,131 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-08-12 20:03:37,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,156 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 62 treesize of output 32 [2021-08-12 20:03:37,158 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,171 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 54 treesize of output 28 [2021-08-12 20:03:37,172 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,184 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 58 treesize of output 30 [2021-08-12 20:03:37,186 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2021-08-12 20:03:37,197 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-08-12 20:03:37,207 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,216 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 43 treesize of output 23 [2021-08-12 20:03:37,217 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:03:37,226 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,235 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 73 treesize of output 37 [2021-08-12 20:03:37,236 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,244 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 44 treesize of output 24 [2021-08-12 20:03:37,245 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:37,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:37,250 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 46 treesize of output 24 [2021-08-12 20:03:37,251 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:37,336 INFO L628 ElimStorePlain]: treesize reduction 346, result has 12.0 percent of original size [2021-08-12 20:03:37,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:03:37,337 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-08-12 20:03:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:37,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678327287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:37,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:37,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-12 20:03:37,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274622378] [2021-08-12 20:03:37,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:03:37,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:37,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:03:37,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:03:37,383 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-08-12 20:03:37,815 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-08-12 20:03:38,035 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-08-12 20:03:38,455 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-08-12 20:03:38,646 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-08-12 20:03:39,268 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-08-12 20:03:39,458 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-08-12 20:03:39,950 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-08-12 20:03:40,462 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-08-12 20:03:41,588 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-08-12 20:03:42,224 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-08-12 20:03:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:43,986 INFO L93 Difference]: Finished difference Result 2745 states and 8652 transitions. [2021-08-12 20:03:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 20:03:43,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 [2021-08-12 20:03:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:43,991 INFO L225 Difference]: With dead ends: 2745 [2021-08-12 20:03:43,991 INFO L226 Difference]: Without dead ends: 2698 [2021-08-12 20:03:43,992 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 3924.7ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 20:03:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-08-12 20:03:44,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1412. [2021-08-12 20:03:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.3217576187101345) internal successors, (4687), 1411 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4687 transitions. [2021-08-12 20:03:44,424 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4687 transitions. Word has length 26 [2021-08-12 20:03:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:44,425 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4687 transitions. [2021-08-12 20:03:44,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-08-12 20:03:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4687 transitions. [2021-08-12 20:03:44,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:44,427 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:44,427 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:44,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-08-12 20:03:44,627 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2065424317, now seen corresponding path program 41 times [2021-08-12 20:03:44,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:44,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442988168] [2021-08-12 20:03:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:44,992 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-08-12 20:03:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:45,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442988168] [2021-08-12 20:03:45,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442988168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093917269] [2021-08-12 20:03:45,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:03:45,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:03:45,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:45,250 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 20:03:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:45,971 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:03:45,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 36 [2021-08-12 20:03:45,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:45,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,003 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:03:46,004 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 44 [2021-08-12 20:03:46,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,040 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-08-12 20:03:46,041 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 44 treesize of output 46 [2021-08-12 20:03:46,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,075 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-08-12 20:03:46,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-08-12 20:03:46,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,106 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:03:46,106 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 53 treesize of output 43 [2021-08-12 20:03:46,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,138 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-08-12 20:03:46,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 38 [2021-08-12 20:03:46,140 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,157 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:03:46,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2021-08-12 20:03:46,159 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,176 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:03:46,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-08-12 20:03:46,177 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,196 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:03:46,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-08-12 20:03:46,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,232 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-08-12 20:03:46,232 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 44 treesize of output 48 [2021-08-12 20:03:46,235 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,253 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:03:46,253 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 45 treesize of output 1 [2021-08-12 20:03:46,254 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,270 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:03:46,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-08-12 20:03:46,271 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,289 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:03:46,289 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 51 treesize of output 1 [2021-08-12 20:03:46,290 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,317 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-08-12 20:03:46,317 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 52 treesize of output 35 [2021-08-12 20:03:46,318 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,336 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:03:46,336 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 47 treesize of output 1 [2021-08-12 20:03:46,337 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:46,347 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:03:46,347 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 55 treesize of output 1 [2021-08-12 20:03:46,348 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:46,482 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-08-12 20:03:46,482 INFO L628 ElimStorePlain]: treesize reduction 202, result has 36.7 percent of original size [2021-08-12 20:03:46,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:03:46,484 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:103 [2021-08-12 20:03:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:46,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093917269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:46,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:46,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-12 20:03:46,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596845145] [2021-08-12 20:03:46,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 20:03:46,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 20:03:46,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:03:46,641 INFO L87 Difference]: Start difference. First operand 1412 states and 4687 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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) [2021-08-12 20:03:47,084 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-08-12 20:03:47,414 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-08-12 20:03:47,695 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-08-12 20:03:48,141 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-08-12 20:03:48,725 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2021-08-12 20:03:49,298 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2021-08-12 20:03:49,484 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-08-12 20:03:50,139 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-08-12 20:03:50,414 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-08-12 20:03:51,123 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-08-12 20:03:52,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:52,609 INFO L93 Difference]: Finished difference Result 2485 states and 7962 transitions. [2021-08-12 20:03:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 20:03:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 [2021-08-12 20:03:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:52,615 INFO L225 Difference]: With dead ends: 2485 [2021-08-12 20:03:52,615 INFO L226 Difference]: Without dead ends: 2453 [2021-08-12 20:03:52,615 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 3383.9ms TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 20:03:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-08-12 20:03:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1413. [2021-08-12 20:03:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3236543909348444) internal successors, (4693), 1412 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4693 transitions. [2021-08-12 20:03:53,113 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4693 transitions. Word has length 26 [2021-08-12 20:03:53,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:53,114 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4693 transitions. [2021-08-12 20:03:53,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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) [2021-08-12 20:03:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4693 transitions. [2021-08-12 20:03:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:53,117 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:53,117 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:53,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:53,334 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash 386531115, now seen corresponding path program 16 times [2021-08-12 20:03:53,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:53,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755018925] [2021-08-12 20:03:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:53,596 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-08-12 20:03:53,781 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-08-12 20:03:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:54,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:54,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755018925] [2021-08-12 20:03:54,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755018925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:54,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916076838] [2021-08-12 20:03:54,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:54,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:03:54,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:03:54,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:54,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 22 [2021-08-12 20:03:54,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 16 [2021-08-12 20:03:54,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:03:54,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:03:54,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:03:54,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-08-12 20:03:54,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:03:54,619 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:03:54,628 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:03:54,638 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:03:54,646 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:03:54,656 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:03:54,664 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:03:54,673 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:03:54,681 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:03:54,723 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:54,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:54,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:03:54,729 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:54,825 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-08-12 20:03:54,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:03:54,827 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-08-12 20:03:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:54,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916076838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:54,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:54,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:03:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430127059] [2021-08-12 20:03:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:03:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:54,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:03:54,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:03:54,887 INFO L87 Difference]: Start difference. First operand 1413 states and 4693 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:55,498 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-08-12 20:03:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:03:57,660 INFO L93 Difference]: Finished difference Result 1801 states and 5863 transitions. [2021-08-12 20:03:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:03:57,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:03:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:03:57,665 INFO L225 Difference]: With dead ends: 1801 [2021-08-12 20:03:57,665 INFO L226 Difference]: Without dead ends: 1784 [2021-08-12 20:03:57,665 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1535.5ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:03:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-08-12 20:03:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1422. [2021-08-12 20:03:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-08-12 20:03:58,124 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-08-12 20:03:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:03:58,124 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-08-12 20:03:58,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:03:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-08-12 20:03:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:03:58,127 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:03:58,127 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:03:58,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable887,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:58,339 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:03:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:03:58,339 INFO L82 PathProgramCache]: Analyzing trace with hash 715690687, now seen corresponding path program 17 times [2021-08-12 20:03:58,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:03:58,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844002991] [2021-08-12 20:03:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:03:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:03:58,737 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-08-12 20:03:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:58,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:03:58,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844002991] [2021-08-12 20:03:58,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844002991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:58,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149474540] [2021-08-12 20:03:58,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:03:58,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:03:58,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:03:58,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 20:03:58,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:03:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:03:59,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:03:59,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:03:59,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 16 [2021-08-12 20:03:59,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:03:59,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:03:59,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 22 [2021-08-12 20:03:59,482 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:03:59,489 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:03:59,495 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:03:59,504 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:03:59,511 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:03:59,518 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-08-12 20:03:59,524 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:03:59,530 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:03:59,535 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:03:59,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:03:59,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:03:59,540 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:03:59,610 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-08-12 20:03:59,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:03:59,611 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-08-12 20:03:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:03:59,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149474540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:03:59,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:03:59,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:03:59,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365279455] [2021-08-12 20:03:59,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:03:59,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:03:59,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:03:59,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:03:59,662 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:00,109 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-08-12 20:04:00,275 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-08-12 20:04:00,652 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-08-12 20:04:00,908 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-08-12 20:04:02,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:02,978 INFO L93 Difference]: Finished difference Result 1617 states and 5258 transitions. [2021-08-12 20:04:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:04:02,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:02,982 INFO L225 Difference]: With dead ends: 1617 [2021-08-12 20:04:02,982 INFO L226 Difference]: Without dead ends: 1600 [2021-08-12 20:04:02,982 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2032.5ms TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:04:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-08-12 20:04:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1431. [2021-08-12 20:04:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 3.327972027972028) internal successors, (4759), 1430 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4759 transitions. [2021-08-12 20:04:03,437 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4759 transitions. Word has length 26 [2021-08-12 20:04:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:03,437 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4759 transitions. [2021-08-12 20:04:03,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4759 transitions. [2021-08-12 20:04:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:03,439 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:03,439 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:03,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-08-12 20:04:03,640 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:03,640 INFO L82 PathProgramCache]: Analyzing trace with hash 547881595, now seen corresponding path program 18 times [2021-08-12 20:04:03,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:03,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895687462] [2021-08-12 20:04:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:04,046 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-08-12 20:04:04,283 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 57 [2021-08-12 20:04:04,510 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-08-12 20:04:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:04,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895687462] [2021-08-12 20:04:04,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895687462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:04,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431926480] [2021-08-12 20:04:04,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:04,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:04:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 20:04:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:05,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:05,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-08-12 20:04:05,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,121 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:04:05,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:05,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-08-12 20:04:05,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,146 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-08-12 20:04:05,147 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,158 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-08-12 20:04:05,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,168 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:04:05,169 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,178 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:04:05,179 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,203 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,204 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 39 treesize of output 23 [2021-08-12 20:04:05,204 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,216 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-12 20:04:05,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-08-12 20:04:05,217 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,227 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:04:05,228 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,237 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 26 [2021-08-12 20:04:05,238 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,247 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-12 20:04:05,248 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 20:04:05,259 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,268 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-08-12 20:04:05,269 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:05,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-08-12 20:04:05,282 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:05,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:05,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-08-12 20:04:05,289 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:05,382 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.8 percent of original size [2021-08-12 20:04:05,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:04:05,386 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-08-12 20:04:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:05,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431926480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:05,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:05,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 20:04:05,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731960487] [2021-08-12 20:04:05,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:04:05,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:04:05,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:04:05,529 INFO L87 Difference]: Start difference. First operand 1431 states and 4759 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:06,268 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2021-08-12 20:04:06,408 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-08-12 20:04:06,821 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-08-12 20:04:07,172 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-08-12 20:04:08,153 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-08-12 20:04:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:09,372 INFO L93 Difference]: Finished difference Result 1911 states and 6218 transitions. [2021-08-12 20:04:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:04:09,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:09,377 INFO L225 Difference]: With dead ends: 1911 [2021-08-12 20:04:09,377 INFO L226 Difference]: Without dead ends: 1894 [2021-08-12 20:04:09,378 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2500.9ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:04:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-08-12 20:04:09,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1422. [2021-08-12 20:04:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-08-12 20:04:09,840 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-08-12 20:04:09,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:09,840 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-08-12 20:04:09,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:09,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-08-12 20:04:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:09,842 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:09,843 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:10,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:10,043 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:10,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2104983929, now seen corresponding path program 19 times [2021-08-12 20:04:10,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:10,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208941762] [2021-08-12 20:04:10,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:10,309 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-08-12 20:04:10,471 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-08-12 20:04:10,634 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-08-12 20:04:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:10,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208941762] [2021-08-12 20:04:10,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208941762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:10,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029675675] [2021-08-12 20:04:10,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:10,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:04:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:11,375 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-08-12 20:04:11,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:11,439 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:11,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-12 20:04:11,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:11,575 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-08-12 20:04:11,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:11,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:11,590 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:11,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-08-12 20:04:11,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:11,727 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 20:04:11,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:11,742 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:11,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-12 20:04:11,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:11,869 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-08-12 20:04:11,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:11,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:11,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-08-12 20:04:11,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:12,007 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-08-12 20:04:12,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:12,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,026 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 34 [2021-08-12 20:04:12,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:12,147 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-08-12 20:04:12,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:12,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,160 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 39 treesize of output 31 [2021-08-12 20:04:12,161 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:12,276 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-08-12 20:04:12,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:12,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-08-12 20:04:12,290 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:12,404 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-08-12 20:04:12,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:12,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-08-12 20:04:12,418 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:12,528 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-08-12 20:04:12,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:12,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:04:12,552 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-08-12 20:04:12,701 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-08-12 20:04:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:12,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029675675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:12,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:12,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:04:12,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991802085] [2021-08-12 20:04:12,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:04:12,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:04:12,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:04:12,785 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:13,602 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-08-12 20:04:13,999 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-08-12 20:04:14,506 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-08-12 20:04:15,250 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-08-12 20:04:15,714 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-08-12 20:04:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:17,579 INFO L93 Difference]: Finished difference Result 2075 states and 6676 transitions. [2021-08-12 20:04:17,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 20:04:17,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:17,584 INFO L225 Difference]: With dead ends: 2075 [2021-08-12 20:04:17,584 INFO L226 Difference]: Without dead ends: 2058 [2021-08-12 20:04:17,584 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 3307.9ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:04:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-08-12 20:04:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1419. [2021-08-12 20:04:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3222849083215795) internal successors, (4711), 1418 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4711 transitions. [2021-08-12 20:04:18,085 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4711 transitions. Word has length 26 [2021-08-12 20:04:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:18,085 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4711 transitions. [2021-08-12 20:04:18,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:18,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4711 transitions. [2021-08-12 20:04:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:18,088 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:18,088 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:18,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable989 [2021-08-12 20:04:18,288 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash 178197831, now seen corresponding path program 20 times [2021-08-12 20:04:18,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:18,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395461008] [2021-08-12 20:04:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:18,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395461008] [2021-08-12 20:04:18,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395461008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837579121] [2021-08-12 20:04:18,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:18,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:18,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:18,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:04:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:19,133 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:04:19,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,161 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:04:19,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-08-12 20:04:19,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,185 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:04:19,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-08-12 20:04:19,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,196 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:04:19,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,218 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:04:19,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-08-12 20:04:19,219 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,229 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 [2021-08-12 20:04:19,230 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,240 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:04:19,241 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,254 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-12 20:04:19,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-08-12 20:04:19,255 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:19,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 [2021-08-12 20:04:19,273 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,283 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-08-12 20:04:19,284 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,293 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-08-12 20:04:19,294 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,303 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:04:19,304 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,322 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-12 20:04:19,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 25 [2021-08-12 20:04:19,323 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,333 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:04:19,334 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,345 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-08-12 20:04:19,345 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,352 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:19,352 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 35 treesize of output 1 [2021-08-12 20:04:19,353 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,474 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-08-12 20:04:19,475 INFO L628 ElimStorePlain]: treesize reduction 63, result has 68.8 percent of original size [2021-08-12 20:04:19,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:04:19,481 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-08-12 20:04:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:19,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837579121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:19,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:19,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:04:19,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808427156] [2021-08-12 20:04:19,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:04:19,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:19,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:04:19,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:04:19,625 INFO L87 Difference]: Start difference. First operand 1419 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:21,075 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-08-12 20:04:21,505 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-08-12 20:04:21,636 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-08-12 20:04:23,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:23,955 INFO L93 Difference]: Finished difference Result 1998 states and 6374 transitions. [2021-08-12 20:04:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:04:23,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:23,960 INFO L225 Difference]: With dead ends: 1998 [2021-08-12 20:04:23,960 INFO L226 Difference]: Without dead ends: 1956 [2021-08-12 20:04:23,960 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2456.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:04:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-08-12 20:04:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1468. [2021-08-12 20:04:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.319700068166326) internal successors, (4870), 1467 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4870 transitions. [2021-08-12 20:04:24,440 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4870 transitions. Word has length 26 [2021-08-12 20:04:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:24,440 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4870 transitions. [2021-08-12 20:04:24,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4870 transitions. [2021-08-12 20:04:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:24,443 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:24,443 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:24,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-08-12 20:04:24,657 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:24,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2057127289, now seen corresponding path program 21 times [2021-08-12 20:04:24,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:24,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401978424] [2021-08-12 20:04:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:25,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401978424] [2021-08-12 20:04:25,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401978424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378926381] [2021-08-12 20:04:25,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:25,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:04:25,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 20:04:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:25,421 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:04:25,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-08-12 20:04:25,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,433 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-08-12 20:04:25,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,452 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:04:25,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 24 [2021-08-12 20:04:25,454 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,475 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:04:25,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-08-12 20:04:25,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,487 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:04:25,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,498 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-08-12 20:04:25,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,520 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:04:25,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-08-12 20:04:25,522 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,532 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:04:25,533 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,554 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:04:25,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-08-12 20:04:25,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,565 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:04:25,566 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,576 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:04:25,577 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,598 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:04:25,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 35 [2021-08-12 20:04:25,600 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,612 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,612 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 30 treesize of output 18 [2021-08-12 20:04:25,613 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:25,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-08-12 20:04:25,630 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,640 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 25 [2021-08-12 20:04:25,640 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,647 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:04:25,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 [2021-08-12 20:04:25,648 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:25,885 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-08-12 20:04:25,886 INFO L628 ElimStorePlain]: treesize reduction 156, result has 50.5 percent of original size [2021-08-12 20:04:25,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:04:25,896 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:873, output treesize:221 [2021-08-12 20:04:26,059 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-08-12 20:04:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378926381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:26,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:26,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-12 20:04:26,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71551274] [2021-08-12 20:04:26,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:04:26,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:04:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:04:26,252 INFO L87 Difference]: Start difference. First operand 1468 states and 4870 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:26,974 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-08-12 20:04:27,391 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-08-12 20:04:27,620 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-08-12 20:04:28,048 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-08-12 20:04:28,425 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-08-12 20:04:29,462 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-08-12 20:04:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:30,813 INFO L93 Difference]: Finished difference Result 2190 states and 6978 transitions. [2021-08-12 20:04:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 20:04:30,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:30,818 INFO L225 Difference]: With dead ends: 2190 [2021-08-12 20:04:30,818 INFO L226 Difference]: Without dead ends: 2163 [2021-08-12 20:04:30,819 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2461.8ms TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 20:04:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-08-12 20:04:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1486. [2021-08-12 20:04:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.3252525252525253) internal successors, (4938), 1485 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4938 transitions. [2021-08-12 20:04:31,316 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4938 transitions. Word has length 26 [2021-08-12 20:04:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:31,317 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4938 transitions. [2021-08-12 20:04:31,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4938 transitions. [2021-08-12 20:04:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:31,319 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:31,319 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:31,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:31,520 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash 309162187, now seen corresponding path program 22 times [2021-08-12 20:04:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:31,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501132173] [2021-08-12 20:04:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:31,760 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-08-12 20:04:31,897 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-08-12 20:04:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:32,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501132173] [2021-08-12 20:04:32,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501132173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213683977] [2021-08-12 20:04:32,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:32,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:04:32,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:32,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:04:32,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:32,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:32,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:32,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 10 [2021-08-12 20:04:32,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:32,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:04:32,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:32,696 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-08-12 20:04:32,697 INFO L628 ElimStorePlain]: treesize reduction 106, result has 62.4 percent of original size [2021-08-12 20:04:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:32,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:32,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:04:32,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:32,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:32,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:04:32,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:32,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:32,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:32,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:32,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:32,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-08-12 20:04:32,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:32,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:32,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-08-12 20:04:32,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:32,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:32,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:04:32,887 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:337, output treesize:72 [2021-08-12 20:04:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:32,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213683977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:32,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:32,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 20:04:32,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572256833] [2021-08-12 20:04:32,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:04:32,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:32,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:04:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:04:32,963 INFO L87 Difference]: Start difference. First operand 1486 states and 4938 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:34,868 INFO L93 Difference]: Finished difference Result 1611 states and 5275 transitions. [2021-08-12 20:04:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 20:04:34,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:34,873 INFO L225 Difference]: With dead ends: 1611 [2021-08-12 20:04:34,873 INFO L226 Difference]: Without dead ends: 1594 [2021-08-12 20:04:34,873 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 897.6ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:04:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-08-12 20:04:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1492. [2021-08-12 20:04:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3272971160295106) internal successors, (4961), 1491 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4961 transitions. [2021-08-12 20:04:35,361 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4961 transitions. Word has length 26 [2021-08-12 20:04:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:35,361 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 4961 transitions. [2021-08-12 20:04:35,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4961 transitions. [2021-08-12 20:04:35,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:35,363 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:35,364 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:35,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-08-12 20:04:35,564 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:35,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1879987787, now seen corresponding path program 23 times [2021-08-12 20:04:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:35,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406302316] [2021-08-12 20:04:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:36,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:36,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406302316] [2021-08-12 20:04:36,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406302316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:36,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571548295] [2021-08-12 20:04:36,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:36,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:04:36,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 20:04:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:36,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:36,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 34 [2021-08-12 20:04:36,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:36,448 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:36,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-08-12 20:04:36,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:36,584 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-08-12 20:04:36,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:36,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:36,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-08-12 20:04:36,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:36,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:36,609 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-08-12 20:04:36,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:36,719 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-08-12 20:04:36,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:36,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:36,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:36,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-08-12 20:04:36,735 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:36,749 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-12 20:04:36,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:36,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:36,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:36,860 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 39 treesize of output 31 [2021-08-12 20:04:36,861 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:36,871 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-12 20:04:36,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-08-12 20:04:36,872 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:37,037 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-08-12 20:04:37,038 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.4 percent of original size [2021-08-12 20:04:37,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 20:04:37,044 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:377, output treesize:160 [2021-08-12 20:04:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:37,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571548295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:37,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:37,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:04:37,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459946929] [2021-08-12 20:04:37,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:04:37,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:37,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:04:37,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:04:37,230 INFO L87 Difference]: Start difference. First operand 1492 states and 4961 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:40,273 INFO L93 Difference]: Finished difference Result 1998 states and 6492 transitions. [2021-08-12 20:04:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 20:04:40,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:40,278 INFO L225 Difference]: With dead ends: 1998 [2021-08-12 20:04:40,278 INFO L226 Difference]: Without dead ends: 1971 [2021-08-12 20:04:40,278 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1350.5ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:04:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-08-12 20:04:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1499. [2021-08-12 20:04:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.3317757009345796) internal successors, (4991), 1498 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4991 transitions. [2021-08-12 20:04:40,788 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4991 transitions. Word has length 26 [2021-08-12 20:04:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:40,788 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 4991 transitions. [2021-08-12 20:04:40,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:40,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4991 transitions. [2021-08-12 20:04:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:40,790 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:40,791 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:40,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-08-12 20:04:40,992 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:40,992 INFO L82 PathProgramCache]: Analyzing trace with hash -224872725, now seen corresponding path program 24 times [2021-08-12 20:04:40,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:40,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462589084] [2021-08-12 20:04:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:41,400 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-08-12 20:04:41,657 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-08-12 20:04:41,877 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-08-12 20:04:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:42,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:42,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462589084] [2021-08-12 20:04:42,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462589084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:42,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984826030] [2021-08-12 20:04:42,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:42,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:04:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:04:42,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:42,587 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-08-12 20:04:42,870 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2021-08-12 20:04:42,972 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_125], 6=[v_prenex_123, v_prenex_124, v_prenex_126]} [2021-08-12 20:04:42,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:42,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:42,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:04:42,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:43,170 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-08-12 20:04:43,170 INFO L628 ElimStorePlain]: treesize reduction 263, result has 47.9 percent of original size [2021-08-12 20:04:43,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:43,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:04:43,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:43,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:43,252 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 20:04:43,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 35 [2021-08-12 20:04:43,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:43,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:43,329 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-12 20:04:43,329 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-08-12 20:04:43,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:43,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:43,401 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-12 20:04:43,401 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 48 [2021-08-12 20:04:43,402 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:43,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:43,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:04:43,452 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:521, output treesize:74 [2021-08-12 20:04:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:43,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984826030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:43,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:43,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:04:43,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757645919] [2021-08-12 20:04:43,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:04:43,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:43,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:04:43,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:04:43,535 INFO L87 Difference]: Start difference. First operand 1499 states and 4991 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:43,743 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 32 [2021-08-12 20:04:44,425 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-08-12 20:04:45,204 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-08-12 20:04:45,923 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 123 [2021-08-12 20:04:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:47,387 INFO L93 Difference]: Finished difference Result 1883 states and 6163 transitions. [2021-08-12 20:04:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:04:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:47,392 INFO L225 Difference]: With dead ends: 1883 [2021-08-12 20:04:47,392 INFO L226 Difference]: Without dead ends: 1866 [2021-08-12 20:04:47,392 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2949.4ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:04:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-08-12 20:04:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1508. [2021-08-12 20:04:47,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 3.33178500331785) internal successors, (5021), 1507 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5021 transitions. [2021-08-12 20:04:47,894 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5021 transitions. Word has length 26 [2021-08-12 20:04:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:47,894 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 5021 transitions. [2021-08-12 20:04:47,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5021 transitions. [2021-08-12 20:04:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:47,896 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:47,896 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:48,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1126 [2021-08-12 20:04:48,097 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1842405505, now seen corresponding path program 25 times [2021-08-12 20:04:48,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:48,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971368656] [2021-08-12 20:04:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:48,367 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-08-12 20:04:48,534 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-08-12 20:04:48,671 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-08-12 20:04:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:48,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:48,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971368656] [2021-08-12 20:04:48,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971368656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:48,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812079385] [2021-08-12 20:04:48,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:04:48,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:49,427 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-08-12 20:04:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:49,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:49,590 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-08-12 20:04:49,590 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 6 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 68 [2021-08-12 20:04:49,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:49,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:49,606 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-12 20:04:49,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 1 [2021-08-12 20:04:49,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:50,041 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 173 [2021-08-12 20:04:50,042 INFO L628 ElimStorePlain]: treesize reduction 703, result has 43.6 percent of original size [2021-08-12 20:04:50,057 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-12 20:04:50,057 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-08-12 20:04:50,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:50,206 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-08-12 20:04:50,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:50,225 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-12 20:04:50,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 35 [2021-08-12 20:04:50,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:50,541 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2021-08-12 20:04:50,542 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.4 percent of original size [2021-08-12 20:04:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:50,558 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-12 20:04:50,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 38 [2021-08-12 20:04:50,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:50,694 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-08-12 20:04:50,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:50,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:50,717 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-08-12 20:04:50,717 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-08-12 20:04:50,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:50,850 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-08-12 20:04:50,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:50,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:50,870 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-08-12 20:04:50,870 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-08-12 20:04:50,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:50,993 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-08-12 20:04:50,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:51,007 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-12 20:04:51,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-08-12 20:04:51,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:51,123 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-08-12 20:04:51,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:51,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:51,144 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-08-12 20:04:51,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 55 [2021-08-12 20:04:51,147 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:51,272 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-08-12 20:04:51,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:51,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:04:51,293 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-08-12 20:04:51,445 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-08-12 20:04:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:51,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812079385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:51,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:51,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:04:51,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421111228] [2021-08-12 20:04:51,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:04:51,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:04:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:04:51,528 INFO L87 Difference]: Start difference. First operand 1508 states and 5021 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:52,296 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-08-12 20:04:52,978 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-08-12 20:04:53,308 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-08-12 20:04:54,219 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-08-12 20:04:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:55,950 INFO L93 Difference]: Finished difference Result 2004 states and 6533 transitions. [2021-08-12 20:04:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:04:55,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:04:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:55,955 INFO L225 Difference]: With dead ends: 2004 [2021-08-12 20:04:55,955 INFO L226 Difference]: Without dead ends: 1983 [2021-08-12 20:04:55,955 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2887.9ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:04:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-08-12 20:04:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1511. [2021-08-12 20:04:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.3350993377483444) internal successors, (5036), 1510 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5036 transitions. [2021-08-12 20:04:56,475 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5036 transitions. Word has length 26 [2021-08-12 20:04:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:56,476 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5036 transitions. [2021-08-12 20:04:56,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5036 transitions. [2021-08-12 20:04:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:04:56,477 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:56,478 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:56,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1137 [2021-08-12 20:04:56,678 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:56,678 INFO L82 PathProgramCache]: Analyzing trace with hash 762618887, now seen corresponding path program 26 times [2021-08-12 20:04:56,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:56,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995513019] [2021-08-12 20:04:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:57,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995513019] [2021-08-12 20:04:57,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995513019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:57,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719374831] [2021-08-12 20:04:57,183 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 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 [2021-08-12 20:04:57,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:57,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:57,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 20:04:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:57,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:57,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-08-12 20:04:57,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,471 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:04:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-08-12 20:04:57,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,482 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:04:57,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:57,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-08-12 20:04:57,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,508 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-12 20:04:57,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-08-12 20:04:57,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,519 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:04:57,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:57,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-08-12 20:04:57,532 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,542 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:04:57,544 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,556 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-08-12 20:04:57,557 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,567 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:04:57,568 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,576 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 20:04:57,578 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,586 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:04:57,587 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,597 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 41 treesize of output 25 [2021-08-12 20:04:57,598 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,607 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:04:57,608 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,616 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-08-12 20:04:57,617 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:04:57,623 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:04:57,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-12 20:04:57,624 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:57,703 INFO L628 ElimStorePlain]: treesize reduction 72, result has 52.6 percent of original size [2021-08-12 20:04:57,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:04:57,704 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-08-12 20:04:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:57,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719374831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:57,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:57,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-12 20:04:57,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221675352] [2021-08-12 20:04:57,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:04:57,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:04:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:04:57,848 INFO L87 Difference]: Start difference. First operand 1511 states and 5036 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:58,231 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-08-12 20:04:58,575 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-08-12 20:05:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:01,518 INFO L93 Difference]: Finished difference Result 2065 states and 6725 transitions. [2021-08-12 20:05:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 20:05:01,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:01,523 INFO L225 Difference]: With dead ends: 2065 [2021-08-12 20:05:01,523 INFO L226 Difference]: Without dead ends: 2038 [2021-08-12 20:05:01,523 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1682.2ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:05:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-08-12 20:05:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1517. [2021-08-12 20:05:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3337730870712403) internal successors, (5054), 1516 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5054 transitions. [2021-08-12 20:05:02,051 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5054 transitions. Word has length 26 [2021-08-12 20:05:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:02,051 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5054 transitions. [2021-08-12 20:05:02,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5054 transitions. [2021-08-12 20:05:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:02,053 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:02,053 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:02,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1167,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:02,253 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:02,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2136387655, now seen corresponding path program 42 times [2021-08-12 20:05:02,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:02,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641611654] [2021-08-12 20:05:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:02,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:02,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641611654] [2021-08-12 20:05:02,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641611654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:02,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659520569] [2021-08-12 20:05:02,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:05:02,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:05:02,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:02,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:05:02,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,402 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 67 treesize of output 35 [2021-08-12 20:05:03,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,414 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 60 treesize of output 32 [2021-08-12 20:05:03,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,426 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 48 treesize of output 26 [2021-08-12 20:05:03,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,437 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 48 treesize of output 21 [2021-08-12 20:05:03,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 15 [2021-08-12 20:05:03,451 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2021-08-12 20:05:03,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2021-08-12 20:05:03,475 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,485 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 46 treesize of output 26 [2021-08-12 20:05:03,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,497 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 65 treesize of output 30 [2021-08-12 20:05:03,498 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,509 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 51 treesize of output 29 [2021-08-12 20:05:03,510 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,521 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 63 treesize of output 35 [2021-08-12 20:05:03,521 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,531 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 58 treesize of output 32 [2021-08-12 20:05:03,532 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 30 [2021-08-12 20:05:03,541 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 30 [2021-08-12 20:05:03,549 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,557 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 55 treesize of output 29 [2021-08-12 20:05:03,557 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:03,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:03,562 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 46 treesize of output 21 [2021-08-12 20:05:03,563 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:03,605 INFO L628 ElimStorePlain]: treesize reduction 44, result has 49.4 percent of original size [2021-08-12 20:05:03,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:05:03,606 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:33 [2021-08-12 20:05:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:03,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659520569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:03,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:03,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 20:05:03,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684970434] [2021-08-12 20:05:03,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:05:03,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:03,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:05:03,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:05:03,642 INFO L87 Difference]: Start difference. First operand 1517 states and 5054 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) [2021-08-12 20:05:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:07,129 INFO L93 Difference]: Finished difference Result 1957 states and 6357 transitions. [2021-08-12 20:05:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:05:07,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:07,134 INFO L225 Difference]: With dead ends: 1957 [2021-08-12 20:05:07,134 INFO L226 Difference]: Without dead ends: 1929 [2021-08-12 20:05:07,134 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1547.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:05:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-08-12 20:05:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1521. [2021-08-12 20:05:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:07,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-08-12 20:05:07,650 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-08-12 20:05:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:07,650 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-08-12 20:05:07,650 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) [2021-08-12 20:05:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-08-12 20:05:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:07,652 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:07,652 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:07,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1179 [2021-08-12 20:05:07,853 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1090705077, now seen corresponding path program 43 times [2021-08-12 20:05:07,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:07,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822414780] [2021-08-12 20:05:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:08,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:08,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822414780] [2021-08-12 20:05:08,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822414780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:08,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791648570] [2021-08-12 20:05:08,351 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 [2021-08-12 20:05:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:05:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:08,673 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-08-12 20:05:08,730 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_143], 6=[v_prenex_141, v_prenex_145]} [2021-08-12 20:05:08,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:08,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:08,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:08,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2021-08-12 20:05:08,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:08,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:08,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:08,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-08-12 20:05:08,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:08,877 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-08-12 20:05:08,877 INFO L628 ElimStorePlain]: treesize reduction 221, result has 44.2 percent of original size [2021-08-12 20:05:08,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:08,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-12 20:05:08,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:08,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:08,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:08,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:08,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:08,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:08,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2021-08-12 20:05:08,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:08,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:08,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:08,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:08,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:08,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-12 20:05:08,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:09,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:09,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:05:09,020 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:483, output treesize:57 [2021-08-12 20:05:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:09,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791648570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:09,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:09,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:05:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376600130] [2021-08-12 20:05:09,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:05:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:05:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:05:09,080 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:11,454 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-08-12 20:05:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:13,165 INFO L93 Difference]: Finished difference Result 2129 states and 6919 transitions. [2021-08-12 20:05:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:05:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:13,170 INFO L225 Difference]: With dead ends: 2129 [2021-08-12 20:05:13,170 INFO L226 Difference]: Without dead ends: 2112 [2021-08-12 20:05:13,170 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1988.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 20:05:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-08-12 20:05:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1521. [2021-08-12 20:05:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-08-12 20:05:13,705 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-08-12 20:05:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:13,705 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-08-12 20:05:13,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-08-12 20:05:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:13,707 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:13,707 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:13,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:13,907 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1679080501, now seen corresponding path program 27 times [2021-08-12 20:05:13,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:13,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794348894] [2021-08-12 20:05:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:14,134 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-08-12 20:05:14,345 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-08-12 20:05:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:14,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:14,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794348894] [2021-08-12 20:05:14,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794348894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:14,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296205275] [2021-08-12 20:05:14,633 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 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 [2021-08-12 20:05:14,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:05:14,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:14,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:05:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:15,191 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-08-12 20:05:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:15,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:15,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:15,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:05:15,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:15,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:15,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-08-12 20:05:15,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:15,436 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-08-12 20:05:15,436 INFO L628 ElimStorePlain]: treesize reduction 39, result has 81.0 percent of original size [2021-08-12 20:05:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:15,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:15,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:15,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-08-12 20:05:15,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:15,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-08-12 20:05:15,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:15,545 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.2 percent of original size [2021-08-12 20:05:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:15,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:05:15,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:15,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:15,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:15,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:15,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:05:15,594 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:15,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:15,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:05:15,631 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-08-12 20:05:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:15,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296205275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:15,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:15,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:05:15,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219122242] [2021-08-12 20:05:15,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:05:15,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:15,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:05:15,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:05:15,702 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:16,218 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-08-12 20:05:17,452 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-08-12 20:05:18,032 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-08-12 20:05:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:19,774 INFO L93 Difference]: Finished difference Result 1980 states and 6390 transitions. [2021-08-12 20:05:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:05:19,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:19,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:19,779 INFO L225 Difference]: With dead ends: 1980 [2021-08-12 20:05:19,779 INFO L226 Difference]: Without dead ends: 1963 [2021-08-12 20:05:19,780 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2330.3ms TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:05:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-08-12 20:05:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1529. [2021-08-12 20:05:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-08-12 20:05:20,323 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-08-12 20:05:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:20,323 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-08-12 20:05:20,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-08-12 20:05:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:20,325 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:20,325 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:20,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-08-12 20:05:20,525 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:20,526 INFO L82 PathProgramCache]: Analyzing trace with hash -128698937, now seen corresponding path program 44 times [2021-08-12 20:05:20,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:20,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796409161] [2021-08-12 20:05:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:20,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796409161] [2021-08-12 20:05:20,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796409161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:20,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134337822] [2021-08-12 20:05:20,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:20,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:05:20,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:20,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 20:05:20,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:21,312 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-08-12 20:05:21,605 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_170, v_prenex_172, v_prenex_162, v_prenex_164], 5=[A, v_prenex_175, v_prenex_166, v_prenex_168]} [2021-08-12 20:05:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:21,634 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:05:21,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-08-12 20:05:21,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:22,042 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2021-08-12 20:05:22,043 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-08-12 20:05:22,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:22,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:22,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 31 [2021-08-12 20:05:22,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-08-12 20:05:22,466 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 151 [2021-08-12 20:05:22,467 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-08-12 20:05:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:22,494 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:05:22,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-08-12 20:05:22,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:22,690 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-08-12 20:05:22,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:22,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:22,715 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:05:22,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 23 [2021-08-12 20:05:22,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:22,904 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-08-12 20:05:22,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:22,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:22,933 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:05:22,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-08-12 20:05:22,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:23,306 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2021-08-12 20:05:23,307 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-08-12 20:05:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:23,330 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:05:23,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2021-08-12 20:05:23,332 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:23,510 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-08-12 20:05:23,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:23,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:23,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:23,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 40 [2021-08-12 20:05:23,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:23,755 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-08-12 20:05:23,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:23,777 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:05:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-08-12 20:05:23,781 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:23,967 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-08-12 20:05:23,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:23,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:05:23,998 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:473, output treesize:269 [2021-08-12 20:05:24,136 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-08-12 20:05:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:24,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134337822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:24,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:24,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:05:24,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471244957] [2021-08-12 20:05:24,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 20:05:24,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 20:05:24,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:05:24,196 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:24,649 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-08-12 20:05:24,945 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2021-08-12 20:05:25,401 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-08-12 20:05:26,747 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-08-12 20:05:27,244 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-08-12 20:05:27,412 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-08-12 20:05:28,383 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-08-12 20:05:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:31,108 INFO L93 Difference]: Finished difference Result 2481 states and 7805 transitions. [2021-08-12 20:05:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 20:05:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:31,113 INFO L225 Difference]: With dead ends: 2481 [2021-08-12 20:05:31,113 INFO L226 Difference]: Without dead ends: 2435 [2021-08-12 20:05:31,114 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3552.8ms TimeCoverageRelationStatistics Valid=513, Invalid=2567, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 20:05:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-08-12 20:05:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1529. [2021-08-12 20:05:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-08-12 20:05:31,660 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-08-12 20:05:31,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:31,660 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-08-12 20:05:31,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-08-12 20:05:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:31,662 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:31,662 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:31,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:31,863 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:31,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1105017781, now seen corresponding path program 45 times [2021-08-12 20:05:31,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:31,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754763850] [2021-08-12 20:05:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:32,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:32,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754763850] [2021-08-12 20:05:32,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754763850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:32,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971698376] [2021-08-12 20:05:32,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:32,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:05:32,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:32,288 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 20:05:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:33,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,041 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-08-12 20:05:33,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 54 [2021-08-12 20:05:33,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,092 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-08-12 20:05:33,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 67 [2021-08-12 20:05:33,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,177 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-08-12 20:05:33,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-08-12 20:05:33,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,250 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-08-12 20:05:33,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-08-12 20:05:33,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,324 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-08-12 20:05:33,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2021-08-12 20:05:33,327 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,383 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-08-12 20:05:33,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-08-12 20:05:33,392 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,434 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-08-12 20:05:33,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 43 [2021-08-12 20:05:33,437 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,484 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-08-12 20:05:33,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 50 [2021-08-12 20:05:33,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,576 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-08-12 20:05:33,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-08-12 20:05:33,589 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,661 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-08-12 20:05:33,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 77 [2021-08-12 20:05:33,694 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,720 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-12 20:05:33,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 1 [2021-08-12 20:05:33,721 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,746 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-12 20:05:33,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-08-12 20:05:33,746 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,771 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-12 20:05:33,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-08-12 20:05:33,771 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,797 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-12 20:05:33,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 1 [2021-08-12 20:05:33,798 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,823 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-12 20:05:33,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-08-12 20:05:33,824 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,842 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-12 20:05:33,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 1 [2021-08-12 20:05:33,843 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:34,441 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 96 [2021-08-12 20:05:34,442 INFO L628 ElimStorePlain]: treesize reduction 622, result has 44.9 percent of original size [2021-08-12 20:05:34,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:05:34,470 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1289, output treesize:912 [2021-08-12 20:05:34,979 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2021-08-12 20:05:35,141 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-08-12 20:05:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:35,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971698376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:35,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:35,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 20:05:35,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67282507] [2021-08-12 20:05:35,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 20:05:35,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:35,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 20:05:35,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-12 20:05:35,220 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:36,561 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-08-12 20:05:37,140 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-08-12 20:05:37,276 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-08-12 20:05:37,421 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-08-12 20:05:37,580 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-08-12 20:05:38,243 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-08-12 20:05:38,407 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-08-12 20:05:38,599 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-08-12 20:05:39,353 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-08-12 20:05:39,600 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-08-12 20:05:40,821 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-08-12 20:05:42,033 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-08-12 20:05:42,320 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 63 [2021-08-12 20:05:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:43,929 INFO L93 Difference]: Finished difference Result 2977 states and 9350 transitions. [2021-08-12 20:05:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 20:05:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:43,935 INFO L225 Difference]: With dead ends: 2977 [2021-08-12 20:05:43,935 INFO L226 Difference]: Without dead ends: 2945 [2021-08-12 20:05:43,936 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 5033.4ms TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 20:05:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-08-12 20:05:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 1537. [2021-08-12 20:05:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.3430989583333335) internal successors, (5135), 1536 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5135 transitions. [2021-08-12 20:05:44,510 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5135 transitions. Word has length 26 [2021-08-12 20:05:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:44,510 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5135 transitions. [2021-08-12 20:05:44,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5135 transitions. [2021-08-12 20:05:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:44,512 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:44,512 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:44,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-08-12 20:05:44,712 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:44,713 INFO L82 PathProgramCache]: Analyzing trace with hash -89210125, now seen corresponding path program 28 times [2021-08-12 20:05:44,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:44,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897173325] [2021-08-12 20:05:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:45,027 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-08-12 20:05:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:45,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:45,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897173325] [2021-08-12 20:05:45,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897173325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:45,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185390597] [2021-08-12 20:05:45,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:45,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:05:45,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:45,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:05:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:45,625 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-08-12 20:05:45,820 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2021-08-12 20:05:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:45,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:45,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:05:45,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:46,039 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-08-12 20:05:46,040 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.1 percent of original size [2021-08-12 20:05:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:46,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:46,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-08-12 20:05:46,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:46,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:46,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:46,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:46,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-08-12 20:05:46,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:46,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:46,115 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 16 treesize of output 10 [2021-08-12 20:05:46,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:46,215 INFO L628 ElimStorePlain]: treesize reduction 19, result has 83.9 percent of original size [2021-08-12 20:05:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:46,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:46,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:05:46,220 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:46,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:46,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:05:46,257 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-08-12 20:05:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:46,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185390597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:46,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:46,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:05:46,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318601030] [2021-08-12 20:05:46,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:05:46,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:46,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:05:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:05:46,329 INFO L87 Difference]: Start difference. First operand 1537 states and 5135 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:46,912 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-08-12 20:05:47,222 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-08-12 20:05:47,706 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-08-12 20:05:48,361 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-08-12 20:05:48,655 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-08-12 20:05:48,845 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-08-12 20:05:49,511 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-08-12 20:05:49,776 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-08-12 20:05:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:51,796 INFO L93 Difference]: Finished difference Result 2085 states and 6716 transitions. [2021-08-12 20:05:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 20:05:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:51,801 INFO L225 Difference]: With dead ends: 2085 [2021-08-12 20:05:51,801 INFO L226 Difference]: Without dead ends: 2068 [2021-08-12 20:05:51,801 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 3002.7ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:05:51,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-08-12 20:05:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1540. [2021-08-12 20:05:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 3.3443794671864846) internal successors, (5147), 1539 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 5147 transitions. [2021-08-12 20:05:52,357 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 5147 transitions. Word has length 26 [2021-08-12 20:05:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:52,357 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 5147 transitions. [2021-08-12 20:05:52,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 5147 transitions. [2021-08-12 20:05:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:52,359 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:52,359 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:52,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1510,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:52,560 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:52,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1706742905, now seen corresponding path program 29 times [2021-08-12 20:05:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:52,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609175508] [2021-08-12 20:05:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:52,781 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-08-12 20:05:52,948 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-08-12 20:05:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:53,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:53,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609175508] [2021-08-12 20:05:53,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609175508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:53,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944658143] [2021-08-12 20:05:53,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:53,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:05:53,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:05:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:53,672 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-08-12 20:05:53,913 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-08-12 20:05:54,002 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-12 20:05:54,002 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 46 [2021-08-12 20:05:54,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:54,166 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-08-12 20:05:54,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:54,182 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-12 20:05:54,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 43 [2021-08-12 20:05:54,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:54,336 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-08-12 20:05:54,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:54,357 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:05:54,357 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 57 [2021-08-12 20:05:54,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:54,505 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-08-12 20:05:54,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:54,523 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:05:54,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-08-12 20:05:54,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:54,685 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-08-12 20:05:54,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:54,702 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:05:54,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 50 [2021-08-12 20:05:54,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:54,842 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-08-12 20:05:54,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:54,859 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:05:54,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-08-12 20:05:54,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:54,989 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-08-12 20:05:54,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:55,002 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-12 20:05:55,003 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 53 [2021-08-12 20:05:55,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:55,123 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-08-12 20:05:55,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:55,137 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:05:55,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2021-08-12 20:05:55,140 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:55,360 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-08-12 20:05:55,360 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-08-12 20:05:55,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:05:55,368 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:687, output treesize:216 [2021-08-12 20:05:55,506 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-08-12 20:05:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:55,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944658143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:55,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:55,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:05:55,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882862606] [2021-08-12 20:05:55,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:05:55,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:55,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:05:55,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:05:55,591 INFO L87 Difference]: Start difference. First operand 1540 states and 5147 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:56,134 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-08-12 20:05:56,426 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-08-12 20:05:57,124 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-08-12 20:05:58,229 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-08-12 20:05:58,716 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 124 [2021-08-12 20:05:59,250 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-08-12 20:06:00,212 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 128 [2021-08-12 20:06:00,872 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2021-08-12 20:06:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:03,535 INFO L93 Difference]: Finished difference Result 2322 states and 7405 transitions. [2021-08-12 20:06:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:06:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:03,541 INFO L225 Difference]: With dead ends: 2322 [2021-08-12 20:06:03,541 INFO L226 Difference]: Without dead ends: 2301 [2021-08-12 20:06:03,541 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 5304.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 20:06:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-08-12 20:06:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1535. [2021-08-12 20:06:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3428943937418514) internal successors, (5128), 1534 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5128 transitions. [2021-08-12 20:06:04,144 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5128 transitions. Word has length 26 [2021-08-12 20:06:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:04,144 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5128 transitions. [2021-08-12 20:06:04,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5128 transitions. [2021-08-12 20:06:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:04,146 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:04,146 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:04,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1519,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:04,347 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:04,347 INFO L82 PathProgramCache]: Analyzing trace with hash 97294587, now seen corresponding path program 46 times [2021-08-12 20:06:04,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:04,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984608527] [2021-08-12 20:06:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:04,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:04,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984608527] [2021-08-12 20:06:04,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984608527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:04,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569197606] [2021-08-12 20:06:04,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:04,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:06:04,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:04,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:06:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:05,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,477 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 55 treesize of output 24 [2021-08-12 20:06:05,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:06:05,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,499 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 53 treesize of output 24 [2021-08-12 20:06:05,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,510 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 44 treesize of output 14 [2021-08-12 20:06:05,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,521 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 40 treesize of output 20 [2021-08-12 20:06:05,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,532 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 45 treesize of output 23 [2021-08-12 20:06:05,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:06:05,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,553 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 51 treesize of output 25 [2021-08-12 20:06:05,554 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,564 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 56 treesize of output 28 [2021-08-12 20:06:05,565 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-08-12 20:06:05,576 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,585 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 52 treesize of output 28 [2021-08-12 20:06:05,586 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,593 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 43 treesize of output 23 [2021-08-12 20:06:05,594 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,601 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 44 treesize of output 18 [2021-08-12 20:06:05,602 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 12 [2021-08-12 20:06:05,609 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,616 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 38 treesize of output 20 [2021-08-12 20:06:05,617 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:05,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:05,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-08-12 20:06:05,621 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:05,663 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-08-12 20:06:05,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:06:05,665 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-08-12 20:06:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:05,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569197606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:05,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:05,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-12 20:06:05,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463089927] [2021-08-12 20:06:05,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:06:05,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:05,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:06:05,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:06:05,707 INFO L87 Difference]: Start difference. First operand 1535 states and 5128 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-08-12 20:06:06,497 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-08-12 20:06:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:12,478 INFO L93 Difference]: Finished difference Result 3150 states and 9994 transitions. [2021-08-12 20:06:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 20:06:12,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 [2021-08-12 20:06:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:12,485 INFO L225 Difference]: With dead ends: 3150 [2021-08-12 20:06:12,485 INFO L226 Difference]: Without dead ends: 3112 [2021-08-12 20:06:12,485 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2358.0ms TimeCoverageRelationStatistics Valid=438, Invalid=1914, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 20:06:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-08-12 20:06:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1630. [2021-08-12 20:06:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.365254757519951) internal successors, (5482), 1629 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5482 transitions. [2021-08-12 20:06:13,119 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5482 transitions. Word has length 26 [2021-08-12 20:06:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:13,119 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5482 transitions. [2021-08-12 20:06:13,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-08-12 20:06:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5482 transitions. [2021-08-12 20:06:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:13,121 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:13,121 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:13,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1533,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:13,322 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:13,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1930943239, now seen corresponding path program 47 times [2021-08-12 20:06:13,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:13,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549869068] [2021-08-12 20:06:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:13,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:13,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549869068] [2021-08-12 20:06:13,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549869068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:13,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457644243] [2021-08-12 20:06:13,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:13,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:06:13,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:13,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 20:06:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:14,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,692 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:06:14,692 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 52 treesize of output 44 [2021-08-12 20:06:14,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,712 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,712 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 45 treesize of output 1 [2021-08-12 20:06:14,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,729 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-08-12 20:06:14,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,746 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,746 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 38 treesize of output 1 [2021-08-12 20:06:14,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,773 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-08-12 20:06:14,773 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 55 treesize of output 39 [2021-08-12 20:06:14,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,800 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-08-12 20:06:14,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 30 [2021-08-12 20:06:14,801 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,819 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,819 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 51 treesize of output 1 [2021-08-12 20:06:14,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,835 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,836 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 44 treesize of output 22 [2021-08-12 20:06:14,837 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:14,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 60 [2021-08-12 20:06:14,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,890 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-08-12 20:06:14,891 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,906 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,906 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 40 treesize of output 20 [2021-08-12 20:06:14,908 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,925 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-08-12 20:06:14,926 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,942 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-08-12 20:06:14,942 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,957 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-08-12 20:06:14,959 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,975 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-08-12 20:06:14,975 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:14,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:14,987 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:06:14,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-08-12 20:06:14,988 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:15,087 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.2 percent of original size [2021-08-12 20:06:15,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:06:15,090 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:93 [2021-08-12 20:06:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:15,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457644243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:15,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:15,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-12 20:06:15,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559413288] [2021-08-12 20:06:15,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 20:06:15,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:15,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 20:06:15,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:06:15,291 INFO L87 Difference]: Start difference. First operand 1630 states and 5482 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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) [2021-08-12 20:06:17,725 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-08-12 20:06:18,698 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-08-12 20:06:18,847 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-08-12 20:06:18,996 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-08-12 20:06:20,075 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-08-12 20:06:20,341 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-08-12 20:06:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:23,702 INFO L93 Difference]: Finished difference Result 3761 states and 11880 transitions. [2021-08-12 20:06:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 20:06:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 [2021-08-12 20:06:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:23,710 INFO L225 Difference]: With dead ends: 3761 [2021-08-12 20:06:23,710 INFO L226 Difference]: Without dead ends: 3702 [2021-08-12 20:06:23,710 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3402.9ms TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 20:06:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-08-12 20:06:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1786. [2021-08-12 20:06:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.3871148459383753) internal successors, (6046), 1785 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6046 transitions. [2021-08-12 20:06:24,415 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6046 transitions. Word has length 26 [2021-08-12 20:06:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:24,415 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6046 transitions. [2021-08-12 20:06:24,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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) [2021-08-12 20:06:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6046 transitions. [2021-08-12 20:06:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:24,417 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:24,417 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:24,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1647,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:24,618 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash -513521361, now seen corresponding path program 30 times [2021-08-12 20:06:24,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:24,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848909929] [2021-08-12 20:06:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:25,043 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2021-08-12 20:06:25,245 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-08-12 20:06:25,436 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-08-12 20:06:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:25,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848909929] [2021-08-12 20:06:25,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848909929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833892489] [2021-08-12 20:06:25,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:25,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:06:25,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:06:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:26,300 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-08-12 20:06:26,575 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-08-12 20:06:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:26,859 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-12 20:06:26,859 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 1 [2021-08-12 20:06:26,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:26,895 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-12 20:06:26,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 68 [2021-08-12 20:06:26,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:27,436 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 179 [2021-08-12 20:06:27,437 INFO L628 ElimStorePlain]: treesize reduction 697, result has 46.5 percent of original size [2021-08-12 20:06:27,462 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:06:27,463 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-08-12 20:06:27,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:27,645 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-08-12 20:06:27,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:27,673 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:06:27,673 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 58 treesize of output 50 [2021-08-12 20:06:27,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:27,849 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-08-12 20:06:27,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:27,885 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-08-12 20:06:27,885 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 74 [2021-08-12 20:06:27,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:28,064 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-08-12 20:06:28,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:28,091 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 20:06:28,091 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 46 treesize of output 51 [2021-08-12 20:06:28,095 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:28,264 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-08-12 20:06:28,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:28,294 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-12 20:06:28,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 67 [2021-08-12 20:06:28,296 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:28,457 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-08-12 20:06:28,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:28,478 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-08-12 20:06:28,478 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 51 treesize of output 46 [2021-08-12 20:06:28,480 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:28,638 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-08-12 20:06:28,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:28,667 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-08-12 20:06:28,667 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 62 [2021-08-12 20:06:28,670 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:28,824 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-08-12 20:06:28,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:28,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:06:28,839 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1441, output treesize:516 [2021-08-12 20:06:29,115 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-08-12 20:06:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:29,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833892489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:29,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:29,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-12 20:06:29,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454741993] [2021-08-12 20:06:29,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:06:29,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:29,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:06:29,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:06:29,234 INFO L87 Difference]: Start difference. First operand 1786 states and 6046 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:29,473 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 39 [2021-08-12 20:06:29,866 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-08-12 20:06:30,238 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-08-12 20:06:30,718 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-08-12 20:06:31,238 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-08-12 20:06:31,620 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-08-12 20:06:32,144 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-08-12 20:06:32,476 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-08-12 20:06:33,340 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2021-08-12 20:06:34,522 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 241 DAG size of output: 229 [2021-08-12 20:06:35,148 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 152 [2021-08-12 20:06:36,524 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 160 [2021-08-12 20:06:38,247 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-08-12 20:06:39,582 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 262 DAG size of output: 240 [2021-08-12 20:06:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:42,848 INFO L93 Difference]: Finished difference Result 2365 states and 7778 transitions. [2021-08-12 20:06:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 20:06:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:42,854 INFO L225 Difference]: With dead ends: 2365 [2021-08-12 20:06:42,854 INFO L226 Difference]: Without dead ends: 2333 [2021-08-12 20:06:42,854 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 10338.5ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 20:06:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-08-12 20:06:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1795. [2021-08-12 20:06:43,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-08-12 20:06:43,567 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-08-12 20:06:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:43,567 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-08-12 20:06:43,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-08-12 20:06:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:43,570 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:43,570 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:43,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-08-12 20:06:43,770 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:43,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:43,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2131054141, now seen corresponding path program 31 times [2021-08-12 20:06:43,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:43,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262534424] [2021-08-12 20:06:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:44,143 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-08-12 20:06:44,280 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-08-12 20:06:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:44,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:44,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262534424] [2021-08-12 20:06:44,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262534424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:44,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662402050] [2021-08-12 20:06:44,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:44,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:06:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:44,898 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-08-12 20:06:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:45,030 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 20:06:45,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 1 [2021-08-12 20:06:45,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:45,062 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-08-12 20:06:45,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 60 [2021-08-12 20:06:45,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:45,527 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 177 [2021-08-12 20:06:45,527 INFO L628 ElimStorePlain]: treesize reduction 703, result has 45.7 percent of original size [2021-08-12 20:06:45,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:45,551 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-08-12 20:06:45,551 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-08-12 20:06:45,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:45,706 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-08-12 20:06:45,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:45,722 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-12 20:06:45,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-08-12 20:06:45,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:45,868 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-08-12 20:06:45,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:45,888 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:06:45,888 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 42 [2021-08-12 20:06:45,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:46,162 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-08-12 20:06:46,163 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.3 percent of original size [2021-08-12 20:06:46,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:46,187 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-08-12 20:06:46,187 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-08-12 20:06:46,189 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:46,321 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-08-12 20:06:46,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:46,338 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:06:46,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-08-12 20:06:46,339 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:46,486 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-08-12 20:06:46,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:46,500 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-08-12 20:06:46,500 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-08-12 20:06:46,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:46,620 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-08-12 20:06:46,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:46,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:46,641 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-08-12 20:06:46,642 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-08-12 20:06:46,643 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:46,754 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-08-12 20:06:46,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:46,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-08-12 20:06:46,762 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-08-12 20:06:46,910 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-08-12 20:06:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:46,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662402050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:46,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:46,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:06:46,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631990147] [2021-08-12 20:06:46,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:06:46,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:46,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:06:46,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:06:46,995 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:47,296 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-08-12 20:06:47,492 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-08-12 20:06:47,774 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-08-12 20:06:48,713 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-08-12 20:06:49,564 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-08-12 20:06:50,496 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2021-08-12 20:06:51,413 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-08-12 20:06:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:53,371 INFO L93 Difference]: Finished difference Result 2512 states and 8289 transitions. [2021-08-12 20:06:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:06:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:53,378 INFO L225 Difference]: With dead ends: 2512 [2021-08-12 20:06:53,378 INFO L226 Difference]: Without dead ends: 2491 [2021-08-12 20:06:53,379 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3216.8ms TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 20:06:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-08-12 20:06:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1795. [2021-08-12 20:06:54,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-08-12 20:06:54,117 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-08-12 20:06:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:54,117 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-08-12 20:06:54,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-08-12 20:06:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:54,119 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:54,119 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:54,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1813,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:54,321 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash 473970251, now seen corresponding path program 32 times [2021-08-12 20:06:54,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:54,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591371755] [2021-08-12 20:06:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:54,661 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-08-12 20:06:54,807 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-08-12 20:06:54,949 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-08-12 20:06:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:55,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:55,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591371755] [2021-08-12 20:06:55,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591371755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:55,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495009902] [2021-08-12 20:06:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:55,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:06:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:06:55,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:55,592 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[v_prenex_239, A, v_prenex_237]} [2021-08-12 20:06:55,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:55,613 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-08-12 20:06:55,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:55,625 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:06:55,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-08-12 20:06:55,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:55,800 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-08-12 20:06:55,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:55,826 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-08-12 20:06:55,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 71 [2021-08-12 20:06:55,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:55,845 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:06:55,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 58 [2021-08-12 20:06:55,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:56,160 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-08-12 20:06:56,160 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.3 percent of original size [2021-08-12 20:06:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:56,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:56,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 57 [2021-08-12 20:06:56,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:56,204 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:06:56,204 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-08-12 20:06:56,207 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:56,506 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-08-12 20:06:56,507 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.4 percent of original size [2021-08-12 20:06:56,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:56,529 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-08-12 20:06:56,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 49 [2021-08-12 20:06:56,530 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:56,550 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-08-12 20:06:56,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-08-12 20:06:56,551 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:56,774 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-08-12 20:06:56,774 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.0 percent of original size [2021-08-12 20:06:56,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-08-12 20:06:56,785 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:641, output treesize:342 [2021-08-12 20:06:56,970 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-08-12 20:06:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:57,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495009902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:57,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:57,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:06:57,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148181660] [2021-08-12 20:06:57,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:06:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:06:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:06:57,157 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:57,370 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 30 [2021-08-12 20:06:57,668 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-08-12 20:06:58,151 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-08-12 20:06:58,351 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2021-08-12 20:06:58,577 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-08-12 20:06:58,709 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-08-12 20:06:59,004 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-08-12 20:06:59,173 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-08-12 20:06:59,555 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-08-12 20:06:59,878 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-08-12 20:07:00,132 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-08-12 20:07:00,322 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-08-12 20:07:00,997 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-08-12 20:07:01,419 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-08-12 20:07:02,171 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-08-12 20:07:02,836 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2021-08-12 20:07:03,755 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 95 [2021-08-12 20:07:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:06,989 INFO L93 Difference]: Finished difference Result 2615 states and 8465 transitions. [2021-08-12 20:07:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 20:07:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:06,995 INFO L225 Difference]: With dead ends: 2615 [2021-08-12 20:07:06,995 INFO L226 Difference]: Without dead ends: 2544 [2021-08-12 20:07:06,996 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 6756.9ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 20:07:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-08-12 20:07:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1779. [2021-08-12 20:07:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.3830146231721034) internal successors, (6015), 1778 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 6015 transitions. [2021-08-12 20:07:07,731 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 6015 transitions. Word has length 26 [2021-08-12 20:07:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:07,731 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 6015 transitions. [2021-08-12 20:07:07,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 6015 transitions. [2021-08-12 20:07:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:07,733 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:07,734 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:07,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:07,934 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash -923228447, now seen corresponding path program 48 times [2021-08-12 20:07:07,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:07,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030731030] [2021-08-12 20:07:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:08,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:08,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030731030] [2021-08-12 20:07:08,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030731030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:08,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169554453] [2021-08-12 20:07:08,317 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 [2021-08-12 20:07:08,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:07:08,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:08,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:07:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 32 [2021-08-12 20:07:08,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:08,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,937 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 50 treesize of output 26 [2021-08-12 20:07:08,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:07:08,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:08,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-08-12 20:07:08,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:08,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 24 [2021-08-12 20:07:08,967 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:08,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,975 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 73 treesize of output 37 [2021-08-12 20:07:08,977 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:08,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,986 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 59 treesize of output 31 [2021-08-12 20:07:08,987 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:08,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:08,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:08,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-08-12 20:07:08,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,006 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 61 treesize of output 31 [2021-08-12 20:07:09,007 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,017 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 58 treesize of output 30 [2021-08-12 20:07:09,018 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,028 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 65 treesize of output 33 [2021-08-12 20:07:09,029 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 24 [2021-08-12 20:07:09,038 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 28 [2021-08-12 20:07:09,048 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 27 [2021-08-12 20:07:09,057 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,066 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 43 treesize of output 23 [2021-08-12 20:07:09,067 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:09,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:09,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 24 [2021-08-12 20:07:09,073 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:09,151 INFO L628 ElimStorePlain]: treesize reduction 323, result has 11.7 percent of original size [2021-08-12 20:07:09,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:07:09,153 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1045, output treesize:31 [2021-08-12 20:07:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:09,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169554453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:09,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:09,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:07:09,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463643448] [2021-08-12 20:07:09,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:07:09,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:07:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:07:09,189 INFO L87 Difference]: Start difference. First operand 1779 states and 6015 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:13,535 INFO L93 Difference]: Finished difference Result 2240 states and 7373 transitions. [2021-08-12 20:07:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:07:13,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:13,540 INFO L225 Difference]: With dead ends: 2240 [2021-08-12 20:07:13,540 INFO L226 Difference]: Without dead ends: 2216 [2021-08-12 20:07:13,541 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1571.9ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:07:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-08-12 20:07:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1764. [2021-08-12 20:07:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-08-12 20:07:14,274 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-08-12 20:07:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:14,274 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-08-12 20:07:14,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-08-12 20:07:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:14,276 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:14,276 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:14,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1874 [2021-08-12 20:07:14,477 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2265419, now seen corresponding path program 49 times [2021-08-12 20:07:14,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:14,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606420962] [2021-08-12 20:07:14,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:14,671 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-08-12 20:07:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:15,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:15,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606420962] [2021-08-12 20:07:15,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606420962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:15,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975506589] [2021-08-12 20:07:15,043 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 [2021-08-12 20:07:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:07:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:15,392 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-08-12 20:07:15,454 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_240], 5=[v_prenex_242, v_prenex_244]} [2021-08-12 20:07:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:15,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:15,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-08-12 20:07:15,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:15,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-08-12 20:07:15,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:15,599 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-08-12 20:07:15,600 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-08-12 20:07:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:15,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-08-12 20:07:15,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:15,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:15,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:15,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:15,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2021-08-12 20:07:15,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:15,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:15,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:15,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:15,702 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 48 treesize of output 24 [2021-08-12 20:07:15,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:15,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:15,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:07:15,740 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-08-12 20:07:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:15,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975506589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:15,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:15,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 20:07:15,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201895014] [2021-08-12 20:07:15,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:07:15,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:15,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:07:15,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:07:15,803 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 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) [2021-08-12 20:07:16,921 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-08-12 20:07:17,836 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-08-12 20:07:18,198 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-08-12 20:07:19,820 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-08-12 20:07:22,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:22,090 INFO L93 Difference]: Finished difference Result 2442 states and 8029 transitions. [2021-08-12 20:07:22,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 20:07:22,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:22,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:22,096 INFO L225 Difference]: With dead ends: 2442 [2021-08-12 20:07:22,096 INFO L226 Difference]: Without dead ends: 2425 [2021-08-12 20:07:22,096 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 3141.4ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:07:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-08-12 20:07:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1764. [2021-08-12 20:07:22,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-08-12 20:07:22,819 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-08-12 20:07:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:22,819 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-08-12 20:07:22,820 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) [2021-08-12 20:07:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-08-12 20:07:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:22,822 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:22,822 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:23,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-08-12 20:07:23,022 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:23,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639121, now seen corresponding path program 50 times [2021-08-12 20:07:23,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:23,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051923851] [2021-08-12 20:07:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:23,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:23,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051923851] [2021-08-12 20:07:23,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051923851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:23,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734810116] [2021-08-12 20:07:23,593 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 [2021-08-12 20:07:23,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:07:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:23,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:07:23,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:23,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,886 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-08-12 20:07:23,886 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 53 treesize of output 37 [2021-08-12 20:07:23,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:23,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:23,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2021-08-12 20:07:23,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:23,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,952 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 20:07:23,953 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 51 treesize of output 41 [2021-08-12 20:07:23,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:23,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,981 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-08-12 20:07:23,981 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 42 treesize of output 28 [2021-08-12 20:07:23,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:23,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:23,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,010 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 20:07:24,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-08-12 20:07:24,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,029 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,029 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 45 treesize of output 1 [2021-08-12 20:07:24,029 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,063 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-08-12 20:07:24,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 46 [2021-08-12 20:07:24,066 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,080 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 20 [2021-08-12 20:07:24,082 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,098 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-08-12 20:07:24,098 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,113 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-08-12 20:07:24,114 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,129 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,129 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 38 treesize of output 20 [2021-08-12 20:07:24,130 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,146 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,147 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 54 treesize of output 1 [2021-08-12 20:07:24,147 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,163 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2021-08-12 20:07:24,164 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,181 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,182 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 49 treesize of output 1 [2021-08-12 20:07:24,182 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,198 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:07:24,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-08-12 20:07:24,199 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:24,216 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-08-12 20:07:24,216 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 54 treesize of output 37 [2021-08-12 20:07:24,217 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:24,307 INFO L628 ElimStorePlain]: treesize reduction 145, result has 27.5 percent of original size [2021-08-12 20:07:24,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:07:24,309 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:55 [2021-08-12 20:07:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:24,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734810116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:24,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:24,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-12 20:07:24,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74662810] [2021-08-12 20:07:24,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:07:24,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:24,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:07:24,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:07:24,419 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 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) [2021-08-12 20:07:26,088 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-08-12 20:07:26,261 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-08-12 20:07:26,404 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-08-12 20:07:26,572 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-08-12 20:07:27,270 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-08-12 20:07:27,583 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-08-12 20:07:27,849 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-08-12 20:07:28,793 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-08-12 20:07:30,820 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-08-12 20:07:30,965 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-08-12 20:07:31,140 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-08-12 20:07:31,297 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-08-12 20:07:32,283 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-08-12 20:07:32,854 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-08-12 20:07:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:35,809 INFO L93 Difference]: Finished difference Result 3058 states and 9814 transitions. [2021-08-12 20:07:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-12 20:07:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:35,816 INFO L225 Difference]: With dead ends: 3058 [2021-08-12 20:07:35,816 INFO L226 Difference]: Without dead ends: 3009 [2021-08-12 20:07:35,816 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 6186.6ms TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2021-08-12 20:07:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-08-12 20:07:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1784. [2021-08-12 20:07:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.37633202467751) internal successors, (6020), 1783 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6020 transitions. [2021-08-12 20:07:36,567 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6020 transitions. Word has length 26 [2021-08-12 20:07:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:36,567 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 6020 transitions. [2021-08-12 20:07:36,567 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) [2021-08-12 20:07:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6020 transitions. [2021-08-12 20:07:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:36,570 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:36,570 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:36,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1994 [2021-08-12 20:07:36,770 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:36,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:36,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1573091019, now seen corresponding path program 51 times [2021-08-12 20:07:36,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:36,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757127855] [2021-08-12 20:07:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:37,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:37,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757127855] [2021-08-12 20:07:37,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757127855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:37,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228101642] [2021-08-12 20:07:37,351 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 [2021-08-12 20:07:37,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 20:07:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:37,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 20:07:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:37,799 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-08-12 20:07:38,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:38,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 66 [2021-08-12 20:07:38,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:07:38,302 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-08-12 20:07:38,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2021-08-12 20:07:38,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:39,531 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 201 DAG size of output: 180 [2021-08-12 20:07:39,532 INFO L628 ElimStorePlain]: treesize reduction 96, result has 91.8 percent of original size [2021-08-12 20:07:39,601 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-12 20:07:39,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-08-12 20:07:39,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:39,663 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-08-12 20:07:39,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 44 [2021-08-12 20:07:39,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:40,830 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2021-08-12 20:07:40,830 INFO L628 ElimStorePlain]: treesize reduction 21, result has 98.0 percent of original size [2021-08-12 20:07:40,906 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 20:07:40,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-08-12 20:07:40,932 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:40,984 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-08-12 20:07:40,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 41 [2021-08-12 20:07:40,986 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:42,263 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 200 DAG size of output: 187 [2021-08-12 20:07:42,264 INFO L628 ElimStorePlain]: treesize reduction 66, result has 94.1 percent of original size [2021-08-12 20:07:42,330 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-12 20:07:42,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-08-12 20:07:42,340 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:42,407 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 20:07:42,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-08-12 20:07:42,433 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:43,718 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 207 DAG size of output: 184 [2021-08-12 20:07:43,719 INFO L628 ElimStorePlain]: treesize reduction 163, result has 86.3 percent of original size [2021-08-12 20:07:43,794 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 20:07:43,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-08-12 20:07:43,807 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:43,872 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-08-12 20:07:43,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 52 [2021-08-12 20:07:43,877 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:45,845 WARN L205 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 202 DAG size of output: 192 [2021-08-12 20:07:45,845 INFO L628 ElimStorePlain]: treesize reduction 53, result has 95.1 percent of original size [2021-08-12 20:07:45,914 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-08-12 20:07:45,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2021-08-12 20:07:45,926 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:45,992 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 20:07:45,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 65 [2021-08-12 20:07:46,032 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:47,869 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 220 DAG size of output: 180 [2021-08-12 20:07:47,869 INFO L628 ElimStorePlain]: treesize reduction 304, result has 75.8 percent of original size [2021-08-12 20:07:47,941 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-08-12 20:07:47,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-08-12 20:07:47,965 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:48,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:48,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 80 [2021-08-12 20:07:48,096 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:49,541 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 279 DAG size of output: 208 [2021-08-12 20:07:49,542 INFO L628 ElimStorePlain]: treesize reduction 459, result has 68.3 percent of original size [2021-08-12 20:07:49,608 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-12 20:07:49,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-08-12 20:07:49,613 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:49,663 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-08-12 20:07:49,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 49 [2021-08-12 20:07:49,669 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:50,932 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2021-08-12 20:07:50,933 INFO L628 ElimStorePlain]: treesize reduction 8, result has 99.2 percent of original size [2021-08-12 20:07:51,361 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 261 [2021-08-12 20:07:51,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-08-12 20:07:51,365 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1105, output treesize:5253 [2021-08-12 20:07:52,908 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 258 DAG size of output: 107 [2021-08-12 20:07:53,400 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-08-12 20:07:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:53,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228101642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:53,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:53,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 20:07:53,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727134090] [2021-08-12 20:07:53,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 20:07:53,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:53,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 20:07:53,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-12 20:07:53,702 INFO L87 Difference]: Start difference. First operand 1784 states and 6020 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:54,203 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2021-08-12 20:07:54,527 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-08-12 20:07:54,842 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-08-12 20:07:55,124 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-08-12 20:07:55,695 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 62 [2021-08-12 20:07:55,853 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-08-12 20:07:56,754 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-08-12 20:07:57,674 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2021-08-12 20:07:57,985 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-08-12 20:07:58,956 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2021-08-12 20:07:59,167 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 37 [2021-08-12 20:07:59,626 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-08-12 20:08:00,697 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-08-12 20:08:01,154 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-08-12 20:08:02,807 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 109 [2021-08-12 20:08:03,148 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-08-12 20:08:04,567 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-08-12 20:08:04,840 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 40 [2021-08-12 20:08:05,118 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 48 [2021-08-12 20:08:06,340 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 75 [2021-08-12 20:08:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:07,182 INFO L93 Difference]: Finished difference Result 2819 states and 9175 transitions. [2021-08-12 20:08:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 20:08:07,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:07,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:07,188 INFO L225 Difference]: With dead ends: 2819 [2021-08-12 20:08:07,188 INFO L226 Difference]: Without dead ends: 2787 [2021-08-12 20:08:07,188 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 10944.5ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-08-12 20:08:07,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-08-12 20:08:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1785. [2021-08-12 20:08:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-08-12 20:08:07,947 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-08-12 20:08:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:07,947 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-08-12 20:08:07,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-08-12 20:08:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:07,950 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:07,950 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:08,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2023 [2021-08-12 20:08:08,152 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash 238696335, now seen corresponding path program 52 times [2021-08-12 20:08:08,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:08,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014902711] [2021-08-12 20:08:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:08,496 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-08-12 20:08:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:08,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014902711] [2021-08-12 20:08:08,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014902711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:08,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165362155] [2021-08-12 20:08:08,673 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 [2021-08-12 20:08:08,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:08:08,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:08,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:08:08,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:09,076 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-08-12 20:08:09,307 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_271, v_prenex_269], 6=[A, v_prenex_273]} [2021-08-12 20:08:09,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:09,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:09,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:09,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 21 [2021-08-12 20:08:09,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:09,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-08-12 20:08:09,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:09,505 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-08-12 20:08:09,506 INFO L628 ElimStorePlain]: treesize reduction 220, result has 44.2 percent of original size [2021-08-12 20:08:09,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-12 20:08:09,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:09,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:09,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:09,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:09,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:09,583 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 18 [2021-08-12 20:08:09,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:09,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:09,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:09,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:09,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:09,645 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 56 treesize of output 30 [2021-08-12 20:08:09,646 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:09,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:09,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-08-12 20:08:09,686 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:485, output treesize:67 [2021-08-12 20:08:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:09,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165362155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:09,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:09,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-12 20:08:09,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330983728] [2021-08-12 20:08:09,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:08:09,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:09,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:08:09,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:08:09,745 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 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) [2021-08-12 20:08:10,785 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-08-12 20:08:11,142 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-08-12 20:08:11,343 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-08-12 20:08:11,710 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-08-12 20:08:12,119 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-08-12 20:08:12,375 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-08-12 20:08:13,233 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-08-12 20:08:13,464 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-08-12 20:08:15,365 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-08-12 20:08:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:16,288 INFO L93 Difference]: Finished difference Result 2302 states and 7577 transitions. [2021-08-12 20:08:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:08:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:16,295 INFO L225 Difference]: With dead ends: 2302 [2021-08-12 20:08:16,295 INFO L226 Difference]: Without dead ends: 2285 [2021-08-12 20:08:16,295 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 3608.6ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 20:08:16,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-12 20:08:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1783. [2021-08-12 20:08:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.377665544332211) internal successors, (6019), 1782 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6019 transitions. [2021-08-12 20:08:17,067 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6019 transitions. Word has length 26 [2021-08-12 20:08:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:17,067 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6019 transitions. [2021-08-12 20:08:17,067 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) [2021-08-12 20:08:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6019 transitions. [2021-08-12 20:08:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:17,070 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:17,070 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:17,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2291 [2021-08-12 20:08:17,270 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:17,270 INFO L82 PathProgramCache]: Analyzing trace with hash -169937649, now seen corresponding path program 53 times [2021-08-12 20:08:17,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:17,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654700040] [2021-08-12 20:08:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:17,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:17,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654700040] [2021-08-12 20:08:17,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654700040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:17,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930627510] [2021-08-12 20:08:17,678 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 [2021-08-12 20:08:17,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 20:08:17,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 20:08:17,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:18,177 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-08-12 20:08:18,492 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-08-12 20:08:18,757 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_282, v_prenex_284, v_prenex_285, v_prenex_286, v_prenex_287, v_prenex_288], 6=[v_prenex_283]} [2021-08-12 20:08:18,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:18,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:18,794 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-08-12 20:08:18,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2021-08-12 20:08:18,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:18,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:18,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-08-12 20:08:18,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-08-12 20:08:19,830 WARN L205 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 192 [2021-08-12 20:08:19,831 INFO L628 ElimStorePlain]: treesize reduction 32, result has 97.5 percent of original size [2021-08-12 20:08:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:19,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:19,868 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:08:19,869 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 38 treesize of output 36 [2021-08-12 20:08:19,872 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:19,906 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:08:19,906 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 47 treesize of output 41 [2021-08-12 20:08:19,910 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:20,810 WARN L205 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 178 [2021-08-12 20:08:20,811 INFO L628 ElimStorePlain]: treesize reduction 50, result has 95.8 percent of original size [2021-08-12 20:08:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:20,855 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-08-12 20:08:20,855 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 44 treesize of output 46 [2021-08-12 20:08:20,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:20,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:20,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:20,891 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-08-12 20:08:20,891 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 53 treesize of output 41 [2021-08-12 20:08:20,908 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:21,713 WARN L205 SmtUtils]: Spent 805.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 166 [2021-08-12 20:08:21,714 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.6 percent of original size [2021-08-12 20:08:21,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:21,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:21,748 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-08-12 20:08:21,748 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 51 treesize of output 37 [2021-08-12 20:08:21,750 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:21,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:21,780 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:08:21,780 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 44 [2021-08-12 20:08:21,782 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:22,476 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2021-08-12 20:08:22,477 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.2 percent of original size [2021-08-12 20:08:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,513 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-08-12 20:08:22,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-08-12 20:08:22,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,550 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-08-12 20:08:22,550 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 44 treesize of output 48 [2021-08-12 20:08:22,553 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:22,885 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-08-12 20:08:22,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,920 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:08:22,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-08-12 20:08:22,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:22,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,939 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-08-12 20:08:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-08-12 20:08:22,940 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:23,506 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2021-08-12 20:08:23,506 INFO L628 ElimStorePlain]: treesize reduction 10, result has 98.7 percent of original size [2021-08-12 20:08:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:23,537 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-08-12 20:08:23,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 32 [2021-08-12 20:08:23,539 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:23,566 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-08-12 20:08:23,566 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 45 treesize of output 39 [2021-08-12 20:08:23,569 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:24,036 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2021-08-12 20:08:24,037 INFO L628 ElimStorePlain]: treesize reduction 37, result has 94.9 percent of original size [2021-08-12 20:08:24,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:24,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:24,080 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-08-12 20:08:24,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 104 [2021-08-12 20:08:24,091 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:24,104 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-08-12 20:08:24,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 1 [2021-08-12 20:08:24,105 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:24,482 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2021-08-12 20:08:24,483 INFO L628 ElimStorePlain]: treesize reduction 68, result has 85.0 percent of original size [2021-08-12 20:08:24,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-08-12 20:08:24,492 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1282, output treesize:291 [2021-08-12 20:08:24,633 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-08-12 20:08:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:24,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930627510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:24,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:24,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-12 20:08:24,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780907633] [2021-08-12 20:08:24,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 20:08:24,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:24,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 20:08:24,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-12 20:08:24,689 INFO L87 Difference]: Start difference. First operand 1783 states and 6019 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:27,261 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-08-12 20:08:33,634 WARN L205 SmtUtils]: Spent 5.65 s on a formula simplification. DAG size of input: 209 DAG size of output: 150 [2021-08-12 20:08:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:36,398 INFO L93 Difference]: Finished difference Result 2526 states and 8355 transitions. [2021-08-12 20:08:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 20:08:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:36,406 INFO L225 Difference]: With dead ends: 2526 [2021-08-12 20:08:36,406 INFO L226 Difference]: Without dead ends: 2509 [2021-08-12 20:08:36,406 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 8392.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:08:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-08-12 20:08:37,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1785. [2021-08-12 20:08:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-08-12 20:08:37,169 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-08-12 20:08:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:37,169 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-08-12 20:08:37,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-08-12 20:08:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:37,171 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:37,171 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:37,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2305,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:37,372 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:37,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:37,372 INFO L82 PathProgramCache]: Analyzing trace with hash 597949447, now seen corresponding path program 54 times [2021-08-12 20:08:37,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:37,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120853183] [2021-08-12 20:08:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:37,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:37,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120853183] [2021-08-12 20:08:37,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120853183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:37,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487155284] [2021-08-12 20:08:37,884 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 [2021-08-12 20:08:37,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:08:37,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:37,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:08:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:38,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,184 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-08-12 20:08:38,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-08-12 20:08:38,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:38,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 58 [2021-08-12 20:08:38,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,240 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2021-08-12 20:08:38,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,261 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,261 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 45 treesize of output 1 [2021-08-12 20:08:38,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,279 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,279 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 51 treesize of output 1 [2021-08-12 20:08:38,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,297 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-08-12 20:08:38,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,315 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 1 [2021-08-12 20:08:38,316 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,332 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-08-12 20:08:38,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,349 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-08-12 20:08:38,350 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,364 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,365 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 42 treesize of output 22 [2021-08-12 20:08:38,366 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,381 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,381 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 38 treesize of output 20 [2021-08-12 20:08:38,383 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,401 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,401 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 46 treesize of output 1 [2021-08-12 20:08:38,401 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,418 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-08-12 20:08:38,419 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,433 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,433 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 38 treesize of output 20 [2021-08-12 20:08:38,434 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,450 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,450 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 47 treesize of output 1 [2021-08-12 20:08:38,451 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:38,460 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-12 20:08:38,460 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 54 treesize of output 1 [2021-08-12 20:08:38,461 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,494 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-08-12 20:08:38,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:38,495 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:27 [2021-08-12 20:08:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:38,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487155284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:38,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:38,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-12 20:08:38,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535527922] [2021-08-12 20:08:38,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:08:38,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:38,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:08:38,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:08:38,567 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 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) [2021-08-12 20:08:39,984 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-08-12 20:08:40,498 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2021-08-12 20:08:40,659 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-08-12 20:08:41,116 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-08-12 20:08:41,648 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-08-12 20:08:41,852 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-08-12 20:08:42,084 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-08-12 20:08:42,742 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-08-12 20:08:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:46,925 INFO L93 Difference]: Finished difference Result 2888 states and 9376 transitions. [2021-08-12 20:08:46,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 20:08:46,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:46,931 INFO L225 Difference]: With dead ends: 2888 [2021-08-12 20:08:46,931 INFO L226 Difference]: Without dead ends: 2841 [2021-08-12 20:08:46,932 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3876.7ms TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 20:08:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-08-12 20:08:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1790. [2021-08-12 20:08:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.377864728898826) internal successors, (6043), 1789 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 6043 transitions. [2021-08-12 20:08:47,731 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 6043 transitions. Word has length 26 [2021-08-12 20:08:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:47,731 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 6043 transitions. [2021-08-12 20:08:47,732 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) [2021-08-12 20:08:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 6043 transitions. [2021-08-12 20:08:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:47,734 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:47,734 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:47,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2371 [2021-08-12 20:08:47,934 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1153824785, now seen corresponding path program 33 times [2021-08-12 20:08:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:47,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47738408] [2021-08-12 20:08:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:48,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:48,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47738408] [2021-08-12 20:08:48,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47738408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:48,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369921765] [2021-08-12 20:08:48,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:48,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:08:48,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:48,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 20:08:48,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:48,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:48,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:48,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:08:48,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:48,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:48,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:48,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:08:48,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:49,180 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-08-12 20:08:49,181 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-08-12 20:08:49,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:49,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:49,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:49,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-08-12 20:08:49,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:49,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:49,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:49,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:08:49,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:49,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:49,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:49,270 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 16 treesize of output 10 [2021-08-12 20:08:49,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:49,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:49,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:49,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:49,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:08:49,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:49,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:49,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-08-12 20:08:49,404 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-08-12 20:08:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:49,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369921765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:49,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:49,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:08:49,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160963838] [2021-08-12 20:08:49,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:08:49,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:08:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:08:49,478 INFO L87 Difference]: Start difference. First operand 1790 states and 6043 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:50,631 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-08-12 20:08:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:53,711 INFO L93 Difference]: Finished difference Result 2199 states and 7295 transitions. [2021-08-12 20:08:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:08:53,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:53,716 INFO L225 Difference]: With dead ends: 2199 [2021-08-12 20:08:53,716 INFO L226 Difference]: Without dead ends: 2182 [2021-08-12 20:08:53,717 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1590.5ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:08:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-08-12 20:08:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1782. [2021-08-12 20:08:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-08-12 20:08:54,525 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-08-12 20:08:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:54,525 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-08-12 20:08:54,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-08-12 20:08:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:54,528 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:54,528 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:54,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2397 [2021-08-12 20:08:54,745 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash -824665213, now seen corresponding path program 34 times [2021-08-12 20:08:54,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:54,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035904796] [2021-08-12 20:08:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:55,049 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-08-12 20:08:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:55,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:55,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035904796] [2021-08-12 20:08:55,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035904796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:55,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248341565] [2021-08-12 20:08:55,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:55,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:08:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:08:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:55,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,639 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-08-12 20:08:55,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,654 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-08-12 20:08:55,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,674 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-12 20:08:55,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-08-12 20:08:55,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,689 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-08-12 20:08:55,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,705 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-08-12 20:08:55,706 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,722 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2021-08-12 20:08:55,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,737 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-08-12 20:08:55,738 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,752 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-08-12 20:08:55,753 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,769 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 1 [2021-08-12 20:08:55,770 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,790 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-12 20:08:55,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 52 [2021-08-12 20:08:55,792 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,804 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-08-12 20:08:55,805 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,819 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-12 20:08:55,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 60 [2021-08-12 20:08:55,821 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,836 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-12 20:08:55,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2021-08-12 20:08:55,837 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,848 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-08-12 20:08:55,849 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:55,861 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-12 20:08:55,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 1 [2021-08-12 20:08:55,862 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,871 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 20:08:55,871 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 60 [2021-08-12 20:08:55,873 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:55,944 INFO L628 ElimStorePlain]: treesize reduction 47, result has 63.6 percent of original size [2021-08-12 20:08:55,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:08:55,946 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1445, output treesize:46 [2021-08-12 20:08:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:55,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248341565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:55,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:55,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:08:55,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475181345] [2021-08-12 20:08:55,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:08:55,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:08:55,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:08:55,991 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:59,553 INFO L93 Difference]: Finished difference Result 1970 states and 6541 transitions. [2021-08-12 20:08:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:08:59,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:59,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:59,558 INFO L225 Difference]: With dead ends: 1970 [2021-08-12 20:08:59,558 INFO L226 Difference]: Without dead ends: 1953 [2021-08-12 20:08:59,559 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1268.4ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:08:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-08-12 20:09:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1791. [2021-08-12 20:09:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.3843575418994414) internal successors, (6058), 1790 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6058 transitions. [2021-08-12 20:09:00,352 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6058 transitions. Word has length 26 [2021-08-12 20:09:00,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:00,352 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6058 transitions. [2021-08-12 20:09:00,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6058 transitions. [2021-08-12 20:09:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:00,355 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:00,355 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:00,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2417,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:00,555 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash -992474305, now seen corresponding path program 35 times [2021-08-12 20:09:00,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:00,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071485503] [2021-08-12 20:09:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:00,790 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-08-12 20:09:00,910 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-08-12 20:09:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:01,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:01,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071485503] [2021-08-12 20:09:01,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071485503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:01,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076408913] [2021-08-12 20:09:01,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:01,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:09:01,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:09:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:01,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:09:01,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:09:01,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-08-12 20:09:01,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:09:01,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:09:01,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:09:01,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:09:01,563 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 22 [2021-08-12 20:09:01,570 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:09:01,576 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-08-12 20:09:01,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 10 [2021-08-12 20:09:01,589 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:09:01,595 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:09:01,601 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:09:01,607 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,612 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:09:01,613 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:01,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:01,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-08-12 20:09:01,617 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:01,685 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-08-12 20:09:01,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:09:01,687 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-08-12 20:09:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:01,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076408913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:01,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:01,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 20:09:01,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978123402] [2021-08-12 20:09:01,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:09:01,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:01,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:09:01,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:09:01,739 INFO L87 Difference]: Start difference. First operand 1791 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:05,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:05,146 INFO L93 Difference]: Finished difference Result 2117 states and 7052 transitions. [2021-08-12 20:09:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 20:09:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:05,151 INFO L225 Difference]: With dead ends: 2117 [2021-08-12 20:09:05,151 INFO L226 Difference]: Without dead ends: 2100 [2021-08-12 20:09:05,152 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 953.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-08-12 20:09:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1785. [2021-08-12 20:09:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.383968609865471) internal successors, (6037), 1784 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) [2021-08-12 20:09:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6037 transitions. [2021-08-12 20:09:05,936 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6037 transitions. Word has length 26 [2021-08-12 20:09:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:05,936 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6037 transitions. [2021-08-12 20:09:05,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6037 transitions. [2021-08-12 20:09:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:05,938 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:05,938 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:06,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2422,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:06,139 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:06,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1234976963, now seen corresponding path program 36 times [2021-08-12 20:09:06,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:06,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92507154] [2021-08-12 20:09:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:06,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:06,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92507154] [2021-08-12 20:09:06,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92507154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:06,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524543012] [2021-08-12 20:09:06,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:06,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:09:06,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:06,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 20:09:06,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:06,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:06,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-08-12 20:09:06,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:06,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,916 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:06,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-08-12 20:09:06,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:06,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,926 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:06,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-12 20:09:06,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:06,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:06,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-08-12 20:09:06,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,945 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:06,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 20:09:06,946 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:06,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,958 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-12 20:09:06,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-08-12 20:09:06,959 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:06,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:06,971 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 34 [2021-08-12 20:09:06,973 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:06,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,982 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:06,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:09:06,983 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:06,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:06,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:06,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-08-12 20:09:06,997 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:07,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:07,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-08-12 20:09:07,007 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:07,017 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:07,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 20:09:07,018 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:07,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:07,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-08-12 20:09:07,033 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:07,044 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:07,044 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 41 treesize of output 25 [2021-08-12 20:09:07,045 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:07,055 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:07,055 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 39 treesize of output 23 [2021-08-12 20:09:07,056 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:07,066 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:07,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-08-12 20:09:07,066 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:07,074 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-12 20:09:07,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-08-12 20:09:07,075 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,209 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-08-12 20:09:07,209 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.8 percent of original size [2021-08-12 20:09:07,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:09:07,212 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-08-12 20:09:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:07,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524543012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:07,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:07,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:09:07,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862621662] [2021-08-12 20:09:07,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:09:07,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:09:07,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:09:07,344 INFO L87 Difference]: Start difference. First operand 1785 states and 6037 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:07,637 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 Received shutdown request... [2021-08-12 20:09:07,834 WARN L222 SmtUtils]: Removed 10 from assertion stack [2021-08-12 20:09:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 20:09:08,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2452 [2021-08-12 20:09:08,043 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 20:09:08,045 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 20:09:08,047 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 20:09:08,047 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 08:09:08 BasicIcfg [2021-08-12 20:09:08,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 20:09:08,047 INFO L168 Benchmark]: Toolchain (without parser) took 514791.69 ms. Allocated memory was 180.4 MB in the beginning and 984.6 MB in the end (delta: 804.3 MB). Free memory was 161.5 MB in the beginning and 831.9 MB in the end (delta: -670.4 MB). Peak memory consumption was 134.2 MB. Max. memory is 8.0 GB. [2021-08-12 20:09:08,047 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 180.4 MB. Free memory was 162.8 MB in the beginning and 162.7 MB in the end (delta: 91.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 20:09:08,048 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.06 ms. Allocated memory is still 180.4 MB. Free memory was 161.5 MB in the beginning and 160.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:09:08,048 INFO L168 Benchmark]: Boogie Preprocessor took 21.56 ms. Allocated memory is still 180.4 MB. Free memory was 160.0 MB in the beginning and 158.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:09:08,048 INFO L168 Benchmark]: RCFGBuilder took 272.04 ms. Allocated memory is still 180.4 MB. Free memory was 158.9 MB in the beginning and 145.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-12 20:09:08,048 INFO L168 Benchmark]: TraceAbstraction took 514464.39 ms. Allocated memory was 180.4 MB in the beginning and 984.6 MB in the end (delta: 804.3 MB). Free memory was 144.9 MB in the beginning and 831.9 MB in the end (delta: -687.1 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. [2021-08-12 20:09:08,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 180.4 MB. Free memory was 162.8 MB in the beginning and 162.7 MB in the end (delta: 91.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.06 ms. Allocated memory is still 180.4 MB. Free memory was 161.5 MB in the beginning and 160.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.56 ms. Allocated memory is still 180.4 MB. Free memory was 160.0 MB in the beginning and 158.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.04 ms. Allocated memory is still 180.4 MB. Free memory was 158.9 MB in the beginning and 145.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 514464.39 ms. Allocated memory was 180.4 MB in the beginning and 984.6 MB in the end (delta: 804.3 MB). Free memory was 144.9 MB in the beginning and 831.9 MB in the end (delta: -687.1 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1785states) and FLOYD_HOARE automaton (currently 10 states, 17 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 83 for 39ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 514384.3ms, OverallIterations: 92, TraceHistogramMax: 2, EmptinessCheckTime: 218.6ms, AutomataDifference: 329622.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 60.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3839 SDtfs, 18359 SDslu, 28487 SDs, 0 SdLazy, 51816 SolverSat, 3086 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34498.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4831 GetRequests, 1685 SyntacticMatches, 95 SemanticMatches, 3050 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34909 ImplicationChecksByTransitivity, 196104.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1795occurred in iteration=79, InterpolantAutomatonStates: 2386, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29814.1ms AutomataMinimizationTime, 91 MinimizatonAttempts, 65676 StatesRemovedByMinimization, 90 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 346.0ms SsaConstructionTime, 1452.2ms SatisfiabilityAnalysisTime, 131957.3ms InterpolantComputationTime, 4550 NumberOfCodeBlocks, 4550 NumberOfCodeBlocksAsserted, 292 NumberOfCheckSat, 4368 ConstructedInterpolants, 78 QuantifiedInterpolants, 154274 SizeOfPredicates, 578 NumberOfNonLiveVariables, 6314 ConjunctsInSsa, 2018 ConjunctsInUnsatCore, 182 InterpolantComputations, 2 PerfectInterpolantSequences, 106/1045 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown