/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:32:26,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:32:26,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:32:26,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:32:26,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:32:26,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:32:26,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:32:26,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:32:26,192 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:32:26,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:32:26,193 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:32:26,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:32:26,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:32:26,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:32:26,195 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:32:26,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:32:26,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:32:26,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:32:26,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:32:26,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:32:26,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:32:26,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:32:26,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:32:26,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:32:26,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:32:26,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:32:26,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:32:26,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:32:26,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:32:26,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:32:26,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:32:26,199 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:32:26,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:32:26,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:32:26,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:32:26,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:32:26,485 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:32:26,488 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:32:26,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl [2021-06-05 16:32:26,489 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun.wvr.bpl' [2021-06-05 16:32:26,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:32:26,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:32:26,529 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:32:26,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:32:26,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:32:26,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,549 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:32:26,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:32:26,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:32:26,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:32:26,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... [2021-06-05 16:32:26,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:32:26,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:32:26,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:32:26,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:32:26,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:32:26,633 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:32:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:32:26,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:32:26,634 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:32:26,634 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:32:26,634 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:32:26,635 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:32:26,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:32:26,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:32:26,635 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:32:26,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:32:26,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:32:26,636 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:32:26,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:32:26,848 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:32:26,850 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:32:26 BoogieIcfgContainer [2021-06-05 16:32:26,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:32:26,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:32:26,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:32:26,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:32:26,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:32:26" (1/2) ... [2021-06-05 16:32:26,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@518502a7 and model type max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:32:26, skipping insertion in model container [2021-06-05 16:32:26,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:32:26" (2/2) ... [2021-06-05 16:32:26,856 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun.wvr.bpl [2021-06-05 16:32:26,860 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:32:26,860 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:32:26,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:32:26,861 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:32:26,923 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:32:26,948 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:32:26,997 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:32:26,997 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:32:26,997 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:32:26,997 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:32:26,997 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:32:26,997 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:32:26,998 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:32:26,998 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:32:27,029 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 16:32:27,051 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) [2021-06-05 16:32:27,054 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) [2021-06-05 16:32:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:32:27,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:27,065 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:27,066 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:27,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:27,075 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-05 16:32:27,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:27,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236843987] [2021-06-05 16:32:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:27,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:27,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236843987] [2021-06-05 16:32:27,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236843987] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:32:27,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:32:27,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:32:27,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346759785] [2021-06-05 16:32:27,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:32:27,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:32:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:32:27,305 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:27,345 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 16:32:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:32:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 16:32:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:27,356 INFO L225 Difference]: With dead ends: 217 [2021-06-05 16:32:27,356 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 16:32:27,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:32:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 16:32:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 16:32:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:27,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 16:32:27,402 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 16:32:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:27,403 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 16:32:27,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 16:32:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:32:27,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:27,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:27,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:32:27,406 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:27,407 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-05 16:32:27,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:27,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195006430] [2021-06-05 16:32:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:27,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:27,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195006430] [2021-06-05 16:32:27,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195006430] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:32:27,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:32:27,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:32:27,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395005665] [2021-06-05 16:32:27,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:32:27,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:32:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:32:27,451 INFO L87 Difference]: Start difference. First operand 149 states and 419 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) [2021-06-05 16:32:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:27,485 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 16:32:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:32:27,486 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 [2021-06-05 16:32:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:27,487 INFO L225 Difference]: With dead ends: 158 [2021-06-05 16:32:27,488 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 16:32:27,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:32:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 16:32:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 16:32:27,501 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) [2021-06-05 16:32:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 16:32:27,503 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 16:32:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:27,503 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 16:32:27,503 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) [2021-06-05 16:32:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 16:32:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:32:27,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:27,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:27,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:32:27,507 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-06-05 16:32:27,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:27,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663276440] [2021-06-05 16:32:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:27,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:27,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663276440] [2021-06-05 16:32:27,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663276440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:32:27,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:32:27,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:32:27,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921139359] [2021-06-05 16:32:27,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:32:27,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:32:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:32:27,549 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) 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) [2021-06-05 16:32:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:27,586 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 16:32:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:32:27,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) 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 [2021-06-05 16:32:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:27,589 INFO L225 Difference]: With dead ends: 183 [2021-06-05 16:32:27,589 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 16:32:27,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:32:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 16:32:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 16:32:27,601 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) [2021-06-05 16:32:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 16:32:27,602 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 16:32:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:27,603 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 16:32:27,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) 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) [2021-06-05 16:32:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 16:32:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:32:27,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:27,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:27,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:32:27,605 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:27,606 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-05 16:32:27,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:27,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111817688] [2021-06-05 16:32:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:28,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:28,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111817688] [2021-06-05 16:32:28,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111817688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:28,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917421024] [2021-06-05 16:32:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:32:28,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:28,498 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 21 treesize of output 13 [2021-06-05 16:32:28,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:32:28,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:32:28,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:28,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:28,534 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:21 [2021-06-05 16:32:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:28,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917421024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:28,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:28,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:28,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022789900] [2021-06-05 16:32:28,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:28,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:28,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:28,590 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:28,877 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 16:32:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:32:28,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 22 [2021-06-05 16:32:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:28,883 INFO L225 Difference]: With dead ends: 330 [2021-06-05 16:32:28,883 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 16:32:28,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:32:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 16:32:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 16:32:28,913 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) [2021-06-05 16:32:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 16:32:28,915 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 16:32:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:28,915 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 16:32:28,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:28,915 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 16:32:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:32:28,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:28,917 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:29,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:29,137 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-05 16:32:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:29,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333347908] [2021-06-05 16:32:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:29,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:29,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333347908] [2021-06-05 16:32:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333347908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:29,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309345576] [2021-06-05 16:32:29,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:29,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:29,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:32:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:29,873 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:29,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 14 [2021-06-05 16:32:29,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:29,889 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:29,889 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 14 [2021-06-05 16:32:29,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:29,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:29,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 16:32:29,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:29,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:29,927 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 21 [2021-06-05 16:32:29,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:29,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:29,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:32:29,997 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:125, output treesize:83 [2021-06-05 16:32:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:30,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309345576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:30,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:30,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 16:32:30,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331149165] [2021-06-05 16:32:30,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:32:30,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:30,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:32:30,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:32:30,145 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) [2021-06-05 16:32:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:30,710 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 16:32:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:32:30,711 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 [2021-06-05 16:32:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:30,714 INFO L225 Difference]: With dead ends: 374 [2021-06-05 16:32:30,714 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 16:32:30,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 817.8ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:32:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 16:32:30,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 16:32:30,727 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) [2021-06-05 16:32:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 16:32:30,729 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 16:32:30,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:30,729 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 16:32:30,730 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) [2021-06-05 16:32:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 16:32:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:32:30,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:30,738 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:30,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:30,960 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:30,961 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-05 16:32:30,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:30,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139413686] [2021-06-05 16:32:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:31,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:31,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139413686] [2021-06-05 16:32:31,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139413686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:31,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595576195] [2021-06-05 16:32:31,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:31,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:32:31,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:31,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 16:32:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:31,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 16:32:31,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:31,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:32:31,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:31,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:32:31,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:31,412 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 21 treesize of output 13 [2021-06-05 16:32:31,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:31,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:32:31,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:31,426 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 21 treesize of output 13 [2021-06-05 16:32:31,428 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:31,451 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:32:31,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:31,452 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:145, output treesize:21 [2021-06-05 16:32:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:31,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595576195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:31,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:31,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:32:31,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375679752] [2021-06-05 16:32:31,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:31,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:31,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:31,504 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:31,684 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-05 16:32:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:32:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:32:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:31,687 INFO L225 Difference]: With dead ends: 296 [2021-06-05 16:32:31,687 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 16:32:31,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:32:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 16:32:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-05 16:32:31,693 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) [2021-06-05 16:32:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 16:32:31,695 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 16:32:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:31,695 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 16:32:31,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 16:32:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:32:31,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:31,696 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:31,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 16:32:31,919 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:31,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-05 16:32:31,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:31,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930111688] [2021-06-05 16:32:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:32,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:32,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930111688] [2021-06-05 16:32:32,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930111688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:32,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765682012] [2021-06-05 16:32:32,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:32,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:32,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:32,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:32:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:32,372 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:32,373 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 14 [2021-06-05 16:32:32,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:32,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 16:32:32,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:32,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:32,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:32:32,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,507 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:32,507 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 14 [2021-06-05 16:32:32,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:32,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:32:32,577 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:133, output treesize:83 [2021-06-05 16:32:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:32,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765682012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:32,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:32,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:32,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647980233] [2021-06-05 16:32:32,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:32,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:32,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:32,708 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) [2021-06-05 16:32:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:33,070 INFO L93 Difference]: Finished difference Result 409 states and 1185 transitions. [2021-06-05 16:32:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:32:33,072 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 [2021-06-05 16:32:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:33,075 INFO L225 Difference]: With dead ends: 409 [2021-06-05 16:32:33,075 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 16:32:33,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:32:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 16:32:33,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 247. [2021-06-05 16:32:33,082 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) [2021-06-05 16:32:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 16:32:33,083 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 16:32:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:33,083 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 16:32:33,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 16:32:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:33,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:33,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:33,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:33,301 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-05 16:32:33,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:33,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080300043] [2021-06-05 16:32:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:33,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:33,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080300043] [2021-06-05 16:32:33,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080300043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:33,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715724920] [2021-06-05 16:32:33,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:33,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:33,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:33,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:33,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715724920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:33,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:33,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:33,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277684601] [2021-06-05 16:32:33,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:33,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:33,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:33,462 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) [2021-06-05 16:32:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:33,908 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 16:32:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:32:33,908 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 [2021-06-05 16:32:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:33,911 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:32:33,911 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:32:33,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:32:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:32:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 16:32:33,920 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) [2021-06-05 16:32:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 16:32:33,921 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 16:32:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:33,922 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 16:32:33,922 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) [2021-06-05 16:32:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 16:32:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:33,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:33,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:34,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 16:32:34,137 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-05 16:32:34,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:34,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881071617] [2021-06-05 16:32:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:34,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:34,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881071617] [2021-06-05 16:32:34,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881071617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:34,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007100292] [2021-06-05 16:32:34,197 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 [2021-06-05 16:32:34,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:34,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:34,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:34,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:34,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007100292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:34,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:34,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:34,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780812212] [2021-06-05 16:32:34,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:34,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:34,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:34,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:34,345 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) [2021-06-05 16:32:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:35,197 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 16:32:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:32:35,198 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 [2021-06-05 16:32:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:35,203 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 16:32:35,203 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 16:32:35,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 528.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:32:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 16:32:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 16:32:35,217 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) [2021-06-05 16:32:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 16:32:35,218 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 16:32:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:35,219 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 16:32:35,219 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) [2021-06-05 16:32:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 16:32:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:35,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:35,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:35,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:35,429 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-05 16:32:35,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:35,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179381072] [2021-06-05 16:32:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:35,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:35,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179381072] [2021-06-05 16:32:35,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179381072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:35,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306413174] [2021-06-05 16:32:35,474 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 [2021-06-05 16:32:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:35,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:35,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:35,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306413174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:35,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:35,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:35,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763413735] [2021-06-05 16:32:35,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:35,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:35,616 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) [2021-06-05 16:32:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:36,293 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 16:32:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:32:36,293 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 [2021-06-05 16:32:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:36,297 INFO L225 Difference]: With dead ends: 951 [2021-06-05 16:32:36,297 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 16:32:36,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 442.9ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:32:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 16:32:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 16:32:36,308 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) [2021-06-05 16:32:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 16:32:36,309 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 16:32:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:36,310 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 16:32:36,310 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) [2021-06-05 16:32:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 16:32:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:36,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:36,311 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:36,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:36,527 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:36,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:36,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-05 16:32:36,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:36,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880803342] [2021-06-05 16:32:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:36,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:36,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880803342] [2021-06-05 16:32:36,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880803342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:36,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953950438] [2021-06-05 16:32:36,563 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 [2021-06-05 16:32:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:36,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:32:36,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:36,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953950438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:36,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:36,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:32:36,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491441038] [2021-06-05 16:32:36,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:32:36,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:36,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:32:36,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:32:36,656 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) [2021-06-05 16:32:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:36,766 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 16:32:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:32:36,766 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 [2021-06-05 16:32:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:36,770 INFO L225 Difference]: With dead ends: 669 [2021-06-05 16:32:36,770 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 16:32:36,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 16:32:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 16:32:36,780 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) [2021-06-05 16:32:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 16:32:36,782 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 16:32:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:36,782 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 16:32:36,782 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) [2021-06-05 16:32:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 16:32:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:36,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:36,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:37,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 16:32:37,005 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-05 16:32:37,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:37,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476976412] [2021-06-05 16:32:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:37,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:37,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476976412] [2021-06-05 16:32:37,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476976412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:37,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146070387] [2021-06-05 16:32:37,063 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 [2021-06-05 16:32:37,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:37,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146070387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:37,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:37,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:32:37,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948876650] [2021-06-05 16:32:37,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:37,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:37,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:37,195 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) [2021-06-05 16:32:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:37,378 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 16:32:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:32:37,378 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 [2021-06-05 16:32:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:37,381 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:32:37,381 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 16:32:37,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:32:37,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 16:32:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 16:32:37,393 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) [2021-06-05 16:32:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 16:32:37,394 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 16:32:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:37,394 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 16:32:37,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 16:32:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:37,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:37,396 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:37,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:37,619 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-05 16:32:37,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:37,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517673330] [2021-06-05 16:32:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:37,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:37,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517673330] [2021-06-05 16:32:37,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517673330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:37,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654837859] [2021-06-05 16:32:37,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:37,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:37,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:32:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:37,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654837859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:37,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:37,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:32:37,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989906376] [2021-06-05 16:32:37,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:32:37,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:37,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:32:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:32:37,745 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) [2021-06-05 16:32:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:37,855 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 16:32:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:32:37,855 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 [2021-06-05 16:32:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:37,859 INFO L225 Difference]: With dead ends: 830 [2021-06-05 16:32:37,859 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 16:32:37,859 INFO L777 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 [2021-06-05 16:32:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 16:32:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 16:32:37,872 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) [2021-06-05 16:32:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 16:32:37,874 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 16:32:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:37,874 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 16:32:37,874 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) [2021-06-05 16:32:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 16:32:37,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:37,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:37,875 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:38,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 16:32:38,089 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:38,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:38,089 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-05 16:32:38,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:38,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359807848] [2021-06-05 16:32:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:38,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:38,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359807848] [2021-06-05 16:32:38,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359807848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:38,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369312776] [2021-06-05 16:32:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:38,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:38,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:38,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369312776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:38,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:38,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:38,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610647169] [2021-06-05 16:32:38,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:38,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:38,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:38,229 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) [2021-06-05 16:32:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:38,538 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 16:32:38,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:32:38,539 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 [2021-06-05 16:32:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:38,543 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 16:32:38,543 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 16:32:38,543 INFO L777 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 [2021-06-05 16:32:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 16:32:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 16:32:38,559 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) [2021-06-05 16:32:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 16:32:38,561 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 16:32:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:38,561 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 16:32:38,561 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) [2021-06-05 16:32:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 16:32:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:38,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:38,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:38,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:32:38,785 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-05 16:32:38,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:38,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698408485] [2021-06-05 16:32:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:38,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:38,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698408485] [2021-06-05 16:32:38,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698408485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:38,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314389860] [2021-06-05 16:32:38,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:38,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:38,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:38,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:38,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314389860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:38,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:38,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:38,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001497603] [2021-06-05 16:32:38,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:38,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:38,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:38,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:38,933 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) [2021-06-05 16:32:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:39,352 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 16:32:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:32:39,357 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 [2021-06-05 16:32:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:39,364 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 16:32:39,364 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 16:32:39,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:32:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 16:32:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 16:32:39,386 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) [2021-06-05 16:32:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 16:32:39,387 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 16:32:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:39,388 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 16:32:39,388 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) [2021-06-05 16:32:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 16:32:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:39,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:39,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:39,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 16:32:39,612 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-05 16:32:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735898294] [2021-06-05 16:32:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:39,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:39,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735898294] [2021-06-05 16:32:39,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735898294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:39,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110652524] [2021-06-05 16:32:39,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:39,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:39,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:39,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:39,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110652524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:39,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:39,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:32:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537963902] [2021-06-05 16:32:39,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:39,796 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) [2021-06-05 16:32:40,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:40,041 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 16:32:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:32:40,041 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 [2021-06-05 16:32:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:40,045 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 16:32:40,045 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 16:32:40,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 199.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:32:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 16:32:40,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 16:32:40,064 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) [2021-06-05 16:32:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 16:32:40,066 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 16:32:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:40,066 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 16:32:40,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 16:32:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:40,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:40,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:40,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 16:32:40,285 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-05 16:32:40,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:40,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753311628] [2021-06-05 16:32:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:40,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:40,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753311628] [2021-06-05 16:32:40,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753311628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:40,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913494502] [2021-06-05 16:32:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:40,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:40,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:40,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:40,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913494502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:40,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:40,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:32:40,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139407827] [2021-06-05 16:32:40,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:40,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:40,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:40,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:40,474 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) [2021-06-05 16:32:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:40,726 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 16:32:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:32:40,726 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 [2021-06-05 16:32:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:40,730 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:32:40,730 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:32:40,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:32:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:32:40,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 16:32:40,747 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) [2021-06-05 16:32:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 16:32:40,750 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 16:32:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:40,750 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 16:32:40,750 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) [2021-06-05 16:32:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 16:32:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:40,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:40,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:40,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:40,965 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-05 16:32:40,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:40,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044240977] [2021-06-05 16:32:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:41,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044240977] [2021-06-05 16:32:41,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044240977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060429525] [2021-06-05 16:32:41,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:41,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060429525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:41,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:41,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:41,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381849023] [2021-06-05 16:32:41,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:41,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:41,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:41,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:41,123 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) [2021-06-05 16:32:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:41,501 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 16:32:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:32:41,501 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 [2021-06-05 16:32:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:41,507 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 16:32:41,507 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 16:32:41,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:32:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 16:32:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 16:32:41,527 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) [2021-06-05 16:32:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 16:32:41,529 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 16:32:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:41,529 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 16:32:41,530 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) [2021-06-05 16:32:41,530 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 16:32:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:41,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:41,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:41,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:41,737 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-05 16:32:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:41,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092614195] [2021-06-05 16:32:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:41,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:41,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092614195] [2021-06-05 16:32:41,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092614195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:41,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278840582] [2021-06-05 16:32:41,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:41,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:41,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:41,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278840582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:41,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:41,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95115714] [2021-06-05 16:32:41,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:41,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:41,916 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) [2021-06-05 16:32:42,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:42,714 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 16:32:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:32:42,715 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 [2021-06-05 16:32:42,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:42,726 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 16:32:42,726 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 16:32:42,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:32:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 16:32:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 16:32:42,769 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) [2021-06-05 16:32:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 16:32:42,772 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 16:32:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:42,772 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 16:32:42,772 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) [2021-06-05 16:32:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 16:32:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:42,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:42,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:42,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:42,996 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:42,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-05 16:32:42,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:42,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687924077] [2021-06-05 16:32:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:43,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:43,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687924077] [2021-06-05 16:32:43,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687924077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:43,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724941236] [2021-06-05 16:32:43,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:43,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:43,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:43,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:43,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724941236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:43,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:43,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:43,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419517252] [2021-06-05 16:32:43,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:43,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:43,202 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) [2021-06-05 16:32:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:43,914 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 16:32:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:32:43,915 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 [2021-06-05 16:32:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:43,921 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 16:32:43,921 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:32:43,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:32:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:32:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 16:32:43,950 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) [2021-06-05 16:32:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 16:32:43,952 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 16:32:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:43,952 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 16:32:43,952 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) [2021-06-05 16:32:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 16:32:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:43,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:43,954 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:44,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 16:32:44,169 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:44,169 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-05 16:32:44,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:44,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015147536] [2021-06-05 16:32:44,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:44,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:44,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015147536] [2021-06-05 16:32:44,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015147536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:44,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096648718] [2021-06-05 16:32:44,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:44,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:44,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:44,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096648718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:44,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:44,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:44,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581252019] [2021-06-05 16:32:44,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:44,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:44,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:44,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:44,308 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) [2021-06-05 16:32:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:44,936 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 16:32:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:32:44,936 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 [2021-06-05 16:32:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:44,943 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 16:32:44,943 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 16:32:44,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:32:44,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 16:32:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 16:32:44,976 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) [2021-06-05 16:32:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 16:32:44,979 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 16:32:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:44,979 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 16:32:44,979 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) [2021-06-05 16:32:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 16:32:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:44,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:44,983 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:45,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 16:32:45,197 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:45,197 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-05 16:32:45,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:45,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578368282] [2021-06-05 16:32:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:45,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:45,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578368282] [2021-06-05 16:32:45,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578368282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:45,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142848676] [2021-06-05 16:32:45,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:45,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:32:45,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:45,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:45,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142848676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:45,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:45,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:45,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353145602] [2021-06-05 16:32:45,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:45,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:45,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:45,360 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) [2021-06-05 16:32:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:45,920 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 16:32:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:32:45,920 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 [2021-06-05 16:32:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:45,925 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 16:32:45,925 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:32:45,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:32:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:32:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 16:32:45,958 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) [2021-06-05 16:32:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 16:32:45,960 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 16:32:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:45,961 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 16:32:45,961 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) [2021-06-05 16:32:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 16:32:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:45,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:45,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:46,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 16:32:46,177 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-05 16:32:46,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:46,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109930295] [2021-06-05 16:32:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:46,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109930295] [2021-06-05 16:32:46,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109930295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755752233] [2021-06-05 16:32:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:46,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:32:46,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:46,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755752233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:46,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:46,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:46,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072185146] [2021-06-05 16:32:46,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:46,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:46,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:46,367 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:47,008 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 16:32:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:32:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-06-05 16:32:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:47,015 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 16:32:47,015 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 16:32:47,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:32:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 16:32:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 16:32:47,042 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) [2021-06-05 16:32:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 16:32:47,045 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 16:32:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:47,045 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 16:32:47,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 16:32:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:47,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:47,047 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:47,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 16:32:47,270 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:47,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-05 16:32:47,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:47,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432081078] [2021-06-05 16:32:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:47,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432081078] [2021-06-05 16:32:47,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432081078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:47,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571394430] [2021-06-05 16:32:47,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:47,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:47,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571394430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:47,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:47,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:47,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237480675] [2021-06-05 16:32:47,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:47,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:47,422 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:48,019 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 16:32:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:32:48,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-06-05 16:32:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:48,025 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:32:48,025 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 16:32:48,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 346.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:32:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 16:32:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 16:32:48,053 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) [2021-06-05 16:32:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 16:32:48,055 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 16:32:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:48,055 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 16:32:48,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 16:32:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:48,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:48,058 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:48,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:32:48,280 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-05 16:32:48,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:48,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606503225] [2021-06-05 16:32:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:48,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:48,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606503225] [2021-06-05 16:32:48,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606503225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:48,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609435699] [2021-06-05 16:32:48,309 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 [2021-06-05 16:32:48,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:32:48,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:48,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:32:48,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:48,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609435699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:48,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:48,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:32:48,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823736026] [2021-06-05 16:32:48,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:32:48,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:32:48,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:32:48,405 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) [2021-06-05 16:32:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:48,494 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 16:32:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:32:48,494 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 [2021-06-05 16:32:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:48,496 INFO L225 Difference]: With dead ends: 929 [2021-06-05 16:32:48,496 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:32:48,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:32:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 16:32:48,522 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) [2021-06-05 16:32:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 16:32:48,524 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 16:32:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:48,525 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 16:32:48,525 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) [2021-06-05 16:32:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 16:32:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:48,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:48,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:48,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:48,743 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-05 16:32:48,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:48,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368381840] [2021-06-05 16:32:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:48,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368381840] [2021-06-05 16:32:48,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368381840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709203417] [2021-06-05 16:32:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:48,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:48,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:48,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:48,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:48,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709203417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:48,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:48,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:32:48,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16524938] [2021-06-05 16:32:48,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:32:48,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:48,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:32:48,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:32:48,885 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) [2021-06-05 16:32:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:49,171 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 16:32:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:32:49,172 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 [2021-06-05 16:32:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:49,177 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 16:32:49,178 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 16:32:49,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:32:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 16:32:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 16:32:49,195 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) [2021-06-05 16:32:49,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 16:32:49,197 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 16:32:49,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:49,197 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 16:32:49,197 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) [2021-06-05 16:32:49,197 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 16:32:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:49,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:49,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:49,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:49,413 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-05 16:32:49,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:49,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745042930] [2021-06-05 16:32:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:49,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745042930] [2021-06-05 16:32:49,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745042930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486371717] [2021-06-05 16:32:49,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:49,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:49,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:49,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486371717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:49,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:49,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:32:49,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523067503] [2021-06-05 16:32:49,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:32:49,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:32:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:32:49,535 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) [2021-06-05 16:32:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:49,795 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 16:32:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:32:49,795 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 [2021-06-05 16:32:49,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:49,798 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 16:32:49,798 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:32:49,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:32:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:32:49,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 16:32:49,812 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) [2021-06-05 16:32:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 16:32:49,815 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 16:32:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:49,815 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 16:32:49,815 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) [2021-06-05 16:32:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 16:32:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:49,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:49,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:50,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:50,039 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:50,040 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-05 16:32:50,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:50,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340401599] [2021-06-05 16:32:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:50,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:50,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340401599] [2021-06-05 16:32:50,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340401599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:50,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831975901] [2021-06-05 16:32:50,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:50,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:50,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:50,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831975901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:50,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:50,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:32:50,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404115787] [2021-06-05 16:32:50,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:32:50,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:50,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:32:50,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:32:50,152 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) [2021-06-05 16:32:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:50,349 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 16:32:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:32:50,349 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 [2021-06-05 16:32:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:50,352 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:32:50,352 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 16:32:50,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:32:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 16:32:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 16:32:50,366 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) [2021-06-05 16:32:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 16:32:50,368 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 16:32:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:50,368 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 16:32:50,368 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) [2021-06-05 16:32:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 16:32:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:50,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:50,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:50,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 16:32:50,585 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:50,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-05 16:32:50,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:50,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828054431] [2021-06-05 16:32:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:50,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828054431] [2021-06-05 16:32:50,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828054431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:50,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476033033] [2021-06-05 16:32:50,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:50,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:50,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:50,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476033033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:50,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:50,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:32:50,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886465905] [2021-06-05 16:32:50,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:32:50,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:50,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:32:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:32:50,699 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) [2021-06-05 16:32:50,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:50,905 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 16:32:50,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:32:50,905 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 [2021-06-05 16:32:50,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:50,908 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 16:32:50,908 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 16:32:50,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:32:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 16:32:50,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 16:32:50,927 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) [2021-06-05 16:32:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 16:32:50,929 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 16:32:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:50,929 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 16:32:50,929 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) [2021-06-05 16:32:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 16:32:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:50,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:50,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:51,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:51,154 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-05 16:32:51,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:51,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373860026] [2021-06-05 16:32:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:51,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:51,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373860026] [2021-06-05 16:32:51,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373860026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:51,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599219577] [2021-06-05 16:32:51,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:51,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:51,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:51,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599219577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:51,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:51,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:51,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981489612] [2021-06-05 16:32:51,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:51,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:51,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:51,292 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) [2021-06-05 16:32:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:51,802 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 16:32:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:32:51,803 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 [2021-06-05 16:32:51,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:51,807 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:32:51,807 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 16:32:51,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:32:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 16:32:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 16:32:51,831 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) [2021-06-05 16:32:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 16:32:51,834 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 16:32:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:51,834 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 16:32:51,834 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) [2021-06-05 16:32:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 16:32:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:51,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:51,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:52,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 16:32:52,056 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:52,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:52,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-05 16:32:52,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:52,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515373519] [2021-06-05 16:32:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:52,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:52,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515373519] [2021-06-05 16:32:52,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515373519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:52,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265538024] [2021-06-05 16:32:52,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:52,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265538024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:52,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:52,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:52,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244822655] [2021-06-05 16:32:52,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:52,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:52,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:52,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:52,218 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) [2021-06-05 16:32:52,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:52,670 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 16:32:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:32:52,671 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 [2021-06-05 16:32:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:52,673 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:32:52,673 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 16:32:52,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:32:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 16:32:52,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 16:32:52,691 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) [2021-06-05 16:32:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:32:52,694 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:32:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:52,694 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:32:52,694 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) [2021-06-05 16:32:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:32:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:52,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:52,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:52,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:52,913 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:52,913 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-05 16:32:52,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:52,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929939505] [2021-06-05 16:32:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:52,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:52,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929939505] [2021-06-05 16:32:52,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929939505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:52,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992629799] [2021-06-05 16:32:52,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:52,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:52,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:53,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992629799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:53,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:53,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:53,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912407690] [2021-06-05 16:32:53,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:53,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:53,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:53,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:53,038 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) [2021-06-05 16:32:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:53,470 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 16:32:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:32:53,472 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 [2021-06-05 16:32:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:53,475 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 16:32:53,475 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:32:53,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:32:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:32:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 16:32:53,492 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) [2021-06-05 16:32:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:32:53,495 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:32:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:53,495 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:32:53,495 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) [2021-06-05 16:32:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:32:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:53,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:53,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:53,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 16:32:53,704 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:53,704 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-05 16:32:53,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:53,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317781208] [2021-06-05 16:32:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:53,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:53,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317781208] [2021-06-05 16:32:53,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317781208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:53,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799823924] [2021-06-05 16:32:53,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:53,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:53,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:53,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:53,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799823924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:53,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:53,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:53,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559143424] [2021-06-05 16:32:53,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:53,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:53,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:53,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:53,846 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) [2021-06-05 16:32:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:54,207 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 16:32:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:32:54,207 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 [2021-06-05 16:32:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:54,209 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 16:32:54,209 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 16:32:54,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:32:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 16:32:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 16:32:54,225 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) [2021-06-05 16:32:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:32:54,227 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:32:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:54,227 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:32:54,227 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) [2021-06-05 16:32:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:32:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:54,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:54,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:54,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:54,434 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-05 16:32:54,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:54,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357548427] [2021-06-05 16:32:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:54,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:54,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357548427] [2021-06-05 16:32:54,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357548427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:54,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692801638] [2021-06-05 16:32:54,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:54,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:54,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:54,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:54,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:54,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692801638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:54,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:54,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:54,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446015724] [2021-06-05 16:32:54,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:54,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:54,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:54,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:54,572 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:54,987 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 16:32:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:32:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-06-05 16:32:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:54,990 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:32:54,990 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 16:32:54,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:32:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 16:32:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 16:32:55,011 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) [2021-06-05 16:32:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:32:55,014 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:32:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:55,014 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:32:55,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:32:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:55,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:55,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:55,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:32:55,232 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-05 16:32:55,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:55,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334531828] [2021-06-05 16:32:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:55,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:55,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334531828] [2021-06-05 16:32:55,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334531828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:55,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877380920] [2021-06-05 16:32:55,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:55,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:55,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:55,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:55,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877380920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:55,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:55,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146413711] [2021-06-05 16:32:55,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:55,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:55,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:55,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:55,379 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:55,744 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 16:32:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:32:55,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-06-05 16:32:55,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:55,746 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 16:32:55,747 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:32:55,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:32:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:32:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 16:32:55,765 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) [2021-06-05 16:32:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:32:55,768 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:32:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:55,768 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:32:55,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:32:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:55,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:55,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:55,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:32:55,991 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-05 16:32:55,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:55,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571294821] [2021-06-05 16:32:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:56,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571294821] [2021-06-05 16:32:56,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571294821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:56,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521360887] [2021-06-05 16:32:56,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:56,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:56,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:56,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:56,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:56,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521360887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:56,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:56,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:56,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060914539] [2021-06-05 16:32:56,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:56,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:56,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:56,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:56,122 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) [2021-06-05 16:32:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:56,483 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 16:32:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:32:56,484 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 [2021-06-05 16:32:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:56,486 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:32:56,486 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 16:32:56,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:32:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 16:32:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 16:32:56,503 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) [2021-06-05 16:32:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 16:32:56,505 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 16:32:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:56,505 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 16:32:56,505 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) [2021-06-05 16:32:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 16:32:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:56,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:56,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:56,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:56,708 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:56,708 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-05 16:32:56,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:56,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130114426] [2021-06-05 16:32:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:56,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:56,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130114426] [2021-06-05 16:32:56,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130114426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:56,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610663321] [2021-06-05 16:32:56,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:56,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610663321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:56,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:56,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:56,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939199005] [2021-06-05 16:32:56,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:56,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:56,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:56,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:56,856 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) [2021-06-05 16:32:57,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:57,132 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 16:32:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:32:57,133 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 [2021-06-05 16:32:57,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:57,135 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 16:32:57,135 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 16:32:57,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:32:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 16:32:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 16:32:57,155 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) [2021-06-05 16:32:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 16:32:57,157 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 16:32:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:57,157 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 16:32:57,157 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) [2021-06-05 16:32:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 16:32:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:57,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:57,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:57,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 16:32:57,381 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-05 16:32:57,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:57,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85385323] [2021-06-05 16:32:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:57,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85385323] [2021-06-05 16:32:57,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85385323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:57,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998674520] [2021-06-05 16:32:57,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:57,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:57,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:57,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:57,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:57,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998674520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:57,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:57,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:57,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069204471] [2021-06-05 16:32:57,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:57,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:57,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:57,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:57,501 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) [2021-06-05 16:32:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:57,715 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 16:32:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:32:57,716 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 [2021-06-05 16:32:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:57,718 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:32:57,718 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 16:32:57,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:32:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 16:32:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 16:32:57,731 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) [2021-06-05 16:32:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 16:32:57,734 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 16:32:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:57,734 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 16:32:57,734 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) [2021-06-05 16:32:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 16:32:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:57,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:57,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:57,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:57,958 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:57,959 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-05 16:32:57,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:57,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630156347] [2021-06-05 16:32:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:57,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:57,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630156347] [2021-06-05 16:32:57,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630156347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:57,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603333587] [2021-06-05 16:32:57,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:58,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:58,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:58,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:58,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:58,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603333587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:58,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:58,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:58,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90231856] [2021-06-05 16:32:58,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:58,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:58,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:58,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:58,098 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:58,417 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 16:32:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:32:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-06-05 16:32:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:58,420 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:32:58,420 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:32:58,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:32:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:32:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 16:32:58,441 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) [2021-06-05 16:32:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 16:32:58,443 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 16:32:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:58,444 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 16:32:58,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 16:32:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:58,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:58,446 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:58,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 16:32:58,661 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-05 16:32:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:58,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52642768] [2021-06-05 16:32:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:58,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:58,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52642768] [2021-06-05 16:32:58,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52642768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:58,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986102551] [2021-06-05 16:32:58,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:58,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:58,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:58,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:58,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:58,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986102551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:58,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:58,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:58,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594428131] [2021-06-05 16:32:58,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:58,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:58,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:58,803 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:59,066 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 16:32:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:32:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 [2021-06-05 16:32:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:59,068 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:32:59,068 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 16:32:59,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:32:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 16:32:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 16:32:59,083 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) [2021-06-05 16:32:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 16:32:59,085 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 16:32:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:59,086 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 16:32:59,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 16:32:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:59,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:59,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:59,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 16:32:59,301 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-05 16:32:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:59,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365546304] [2021-06-05 16:32:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:59,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:59,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365546304] [2021-06-05 16:32:59,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365546304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:59,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901785254] [2021-06-05 16:32:59,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:59,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:59,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:59,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:59,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901785254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:59,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:59,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:59,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130547469] [2021-06-05 16:32:59,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:59,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:59,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:59,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:59,418 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 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) [2021-06-05 16:32:59,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:59,604 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 16:32:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:32:59,604 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 [2021-06-05 16:32:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:59,606 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:32:59,606 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 16:32:59,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:32:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 16:32:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 16:32:59,620 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) [2021-06-05 16:32:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 16:32:59,622 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 16:32:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:59,622 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 16:32:59,623 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) [2021-06-05 16:32:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 16:32:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:59,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:59,624 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:59,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:59,825 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-05 16:32:59,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:59,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246002667] [2021-06-05 16:32:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:00,111 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-05 16:33:00,247 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 16:33:00,377 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 16:33:00,516 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 16:33:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:00,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:00,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246002667] [2021-06-05 16:33:00,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246002667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:00,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723107143] [2021-06-05 16:33:00,607 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 [2021-06-05 16:33:00,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:00,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:00,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:33:00,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:01,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-06-05 16:33:01,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:33:01,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,110 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 36 treesize of output 19 [2021-06-05 16:33:01,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:01,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:01,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:01,134 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:01,141 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,147 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:01,148 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:33:01,155 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-06-05 16:33:01,161 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:01,170 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:33:01,176 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,181 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:33:01,182 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:01,188 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:33:01,192 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,266 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-05 16:33:01,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:01,268 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-05 16:33:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:01,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723107143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:01,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:01,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:01,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093394128] [2021-06-05 16:33:01,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:01,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:01,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:01,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:01,330 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) [2021-06-05 16:33:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:02,224 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-06-05 16:33:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:33:02,225 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 [2021-06-05 16:33:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:02,226 INFO L225 Difference]: With dead ends: 1531 [2021-06-05 16:33:02,226 INFO L226 Difference]: Without dead ends: 1516 [2021-06-05 16:33:02,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1462.1ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:33:02,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-05 16:33:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-06-05 16:33:02,240 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) [2021-06-05 16:33:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 16:33:02,243 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 16:33:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:02,245 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 16:33:02,245 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) [2021-06-05 16:33:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 16:33:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:02,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:02,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:02,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 16:33:02,469 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-05 16:33:02,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:02,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964977425] [2021-06-05 16:33:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:03,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:03,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964977425] [2021-06-05 16:33:03,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964977425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:03,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176731912] [2021-06-05 16:33:03,116 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 [2021-06-05 16:33:03,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:03,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:03,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:33:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:03,702 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-05 16:33:03,762 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-06-05 16:33:03,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:03,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:03,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:03,880 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 16:33:03,885 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-05 16:33:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:03,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:03,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:03,892 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 28 treesize of output 16 [2021-06-05 16:33:03,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:03,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:03,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:03,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:03,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:03,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:33:03,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:03,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:03,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:03,988 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-05 16:33:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:04,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176731912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:04,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:04,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462964684] [2021-06-05 16:33:04,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:04,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:04,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:04,064 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 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) [2021-06-05 16:33:04,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:04,983 INFO L93 Difference]: Finished difference Result 1509 states and 4945 transitions. [2021-06-05 16:33:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:33:04,984 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 [2021-06-05 16:33:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:04,986 INFO L225 Difference]: With dead ends: 1509 [2021-06-05 16:33:04,986 INFO L226 Difference]: Without dead ends: 1494 [2021-06-05 16:33:04,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1518.2ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:33:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-06-05 16:33:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1150. [2021-06-05 16:33:04,998 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) [2021-06-05 16:33:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 16:33:05,000 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 16:33:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:05,000 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 16:33:05,000 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) [2021-06-05 16:33:05,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 16:33:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:05,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:05,002 INFO L521 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] [2021-06-05 16:33:05,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:05,203 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:05,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-05 16:33:05,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:05,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595993763] [2021-06-05 16:33:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:05,708 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 16:33:05,883 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-05 16:33:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:06,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:06,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595993763] [2021-06-05 16:33:06,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595993763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:06,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681497051] [2021-06-05 16:33:06,022 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 [2021-06-05 16:33:06,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:06,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:06,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,690 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 35 treesize of output 19 [2021-06-05 16:33:06,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:33:06,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,713 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 35 treesize of output 19 [2021-06-05 16:33:06,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,724 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:06,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,737 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 16 [2021-06-05 16:33:06,738 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,747 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 16 [2021-06-05 16:33:06,748 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-06-05 16:33:06,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:33:06,770 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,779 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 37 treesize of output 19 [2021-06-05 16:33:06,780 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,789 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 19 [2021-06-05 16:33:06,790 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:33:06,800 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,813 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 16 [2021-06-05 16:33:06,814 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,823 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:33:06,824 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:06,834 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:06,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:06,840 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 13 [2021-06-05 16:33:06,841 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:06,870 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-05 16:33:06,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:06,872 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-05 16:33:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:06,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681497051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:06,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:06,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:33:06,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724378011] [2021-06-05 16:33:06,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:06,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:06,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:06,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:06,912 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) [2021-06-05 16:33:08,064 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 41 [2021-06-05 16:33:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:08,647 INFO L93 Difference]: Finished difference Result 1607 states and 5192 transitions. [2021-06-05 16:33:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:33:08,647 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 [2021-06-05 16:33:08,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:08,649 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 16:33:08,649 INFO L226 Difference]: Without dead ends: 1592 [2021-06-05 16:33:08,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2247.4ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:33:08,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-05 16:33:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1180. [2021-06-05 16:33:08,662 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) [2021-06-05 16:33:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 16:33:08,664 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 16:33:08,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:08,664 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 16:33:08,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:08,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 16:33:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:08,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:08,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:08,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 16:33:08,866 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:08,867 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-05 16:33:08,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:08,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085010657] [2021-06-05 16:33:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:09,314 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-05 16:33:09,519 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 16:33:09,753 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-05 16:33:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:09,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:09,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085010657] [2021-06-05 16:33:09,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085010657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:09,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434178981] [2021-06-05 16:33:09,787 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 [2021-06-05 16:33:09,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:09,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:10,116 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 43 treesize of output 31 [2021-06-05 16:33:10,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,131 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:10,131 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 40 treesize of output 22 [2021-06-05 16:33:10,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:10,148 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 40 treesize of output 28 [2021-06-05 16:33:10,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,169 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:10,169 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 29 treesize of output 23 [2021-06-05 16:33:10,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,187 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:10,187 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 29 treesize of output 23 [2021-06-05 16:33:10,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,201 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:10,201 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 45 treesize of output 25 [2021-06-05 16:33:10,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,213 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:10,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-05 16:33:10,214 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,226 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:10,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-06-05 16:33:10,226 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,236 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:10,236 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 40 treesize of output 24 [2021-06-05 16:33:10,237 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:10,246 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 45 treesize of output 27 [2021-06-05 16:33:10,247 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,257 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:10,257 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 47 treesize of output 25 [2021-06-05 16:33:10,258 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:10,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 16:33:10,284 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:10,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 16:33:10,302 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:10,318 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 45 treesize of output 31 [2021-06-05 16:33:10,322 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,336 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:10,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2021-06-05 16:33:10,338 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,345 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:10,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:33:10,345 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:10,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:10,425 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-06-05 16:33:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:10,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434178981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:10,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:10,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:33:10,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968202819] [2021-06-05 16:33:10,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:10,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:10,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:10,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:10,666 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 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) [2021-06-05 16:33:11,425 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-05 16:33:11,701 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-05 16:33:11,839 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 16:33:12,127 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 16:33:12,284 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-05 16:33:12,561 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 16:33:12,721 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 16:33:13,003 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-05 16:33:13,172 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 16:33:13,750 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 16:33:14,029 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-05 16:33:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:14,149 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-06-05 16:33:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:33:14,149 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 [2021-06-05 16:33:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:14,152 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 16:33:14,152 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 16:33:14,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3853.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:33:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 16:33:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-06-05 16:33:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-05 16:33:14,169 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-05 16:33:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:14,169 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-05 16:33:14,169 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) [2021-06-05 16:33:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-05 16:33:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:14,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:14,170 INFO L521 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] [2021-06-05 16:33:14,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:14,371 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-05 16:33:14,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:14,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332675623] [2021-06-05 16:33:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:14,833 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 16:33:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:15,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:15,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332675623] [2021-06-05 16:33:15,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332675623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:15,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231519488] [2021-06-05 16:33:15,013 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 [2021-06-05 16:33:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:15,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:33:15,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:15,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,707 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 13 [2021-06-05 16:33:15,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,719 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 30 treesize of output 16 [2021-06-05 16:33:15,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,730 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 37 treesize of output 19 [2021-06-05 16:33:15,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,741 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 13 [2021-06-05 16:33:15,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,752 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 13 [2021-06-05 16:33:15,753 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,762 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 16 [2021-06-05 16:33:15,763 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,774 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 19 [2021-06-05 16:33:15,775 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,786 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 35 treesize of output 19 [2021-06-05 16:33:15,787 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,796 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 16 [2021-06-05 16:33:15,796 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,806 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 16 [2021-06-05 16:33:15,807 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:15,817 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,830 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 13 [2021-06-05 16:33:15,831 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,839 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 16 [2021-06-05 16:33:15,840 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,849 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 13 [2021-06-05 16:33:15,850 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:15,856 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 35 treesize of output 19 [2021-06-05 16:33:15,857 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,883 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-05 16:33:15,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:15,885 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-05 16:33:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:15,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231519488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:15,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:15,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:33:15,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436110033] [2021-06-05 16:33:15,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:15,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:15,928 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:17,216 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-05 16:33:17,435 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-05 16:33:17,584 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-05 16:33:17,716 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-05 16:33:18,087 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-05 16:33:18,261 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2021-06-05 16:33:18,573 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 16:33:18,720 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2021-06-05 16:33:19,237 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 16:33:19,431 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-05 16:33:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:19,591 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-06-05 16:33:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:33:19,592 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 [2021-06-05 16:33:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:19,594 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 16:33:19,594 INFO L226 Difference]: Without dead ends: 1862 [2021-06-05 16:33:19,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3647.3ms TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:33:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-05 16:33:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-06-05 16:33:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-05 16:33:19,609 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-05 16:33:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:19,609 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-05 16:33:19,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-05 16:33:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:19,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:19,611 INFO L521 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] [2021-06-05 16:33:19,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:19,812 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:19,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:19,812 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-05 16:33:19,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:19,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268337079] [2021-06-05 16:33:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:20,164 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 16:33:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:20,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:20,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268337079] [2021-06-05 16:33:20,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268337079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:20,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326957837] [2021-06-05 16:33:20,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:20,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:21,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,150 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-05 16:33:21,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 29 [2021-06-05 16:33:21,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,186 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:33:21,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 30 [2021-06-05 16:33:21,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,230 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:33:21,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 31 [2021-06-05 16:33:21,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,276 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:33:21,276 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 28 treesize of output 28 [2021-06-05 16:33:21,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,313 INFO L354 Elim1Store]: treesize reduction 9, result has 66.7 percent of original size [2021-06-05 16:33:21,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 36 [2021-06-05 16:33:21,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,335 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:21,335 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 28 treesize of output 1 [2021-06-05 16:33:21,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,356 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:21,357 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 [2021-06-05 16:33:21,357 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,377 INFO L354 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2021-06-05 16:33:21,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 22 [2021-06-05 16:33:21,378 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,406 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:21,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:33:21,406 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,421 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:33:21,422 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,437 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:21,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:33:21,438 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,461 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 16:33:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-06-05 16:33:21,463 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:21,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 16:33:21,507 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,530 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:21,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:21,531 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,552 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:21,552 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 [2021-06-05 16:33:21,553 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:21,565 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:33:21,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:33:21,566 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,737 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-06-05 16:33:21,738 INFO L628 ElimStorePlain]: treesize reduction 94, result has 58.6 percent of original size [2021-06-05 16:33:21,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:21,741 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:148 [2021-06-05 16:33:21,873 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-06-05 16:33:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:21,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326957837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:21,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:21,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 16:33:21,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665831750] [2021-06-05 16:33:21,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:33:21,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:21,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:33:21,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:33:21,928 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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) [2021-06-05 16:33:23,323 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 16:33:23,455 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-05 16:33:23,663 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 49 [2021-06-05 16:33:23,800 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 45 [2021-06-05 16:33:24,136 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 16:33:24,677 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-06-05 16:33:24,827 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 16:33:24,984 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:33:25,325 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 16:33:25,643 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-05 16:33:25,860 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-06-05 16:33:26,112 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-05 16:33:26,400 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 16:33:26,535 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-06-05 16:33:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:26,663 INFO L93 Difference]: Finished difference Result 2051 states and 6324 transitions. [2021-06-05 16:33:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:33:26,664 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 [2021-06-05 16:33:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:26,666 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 16:33:26,666 INFO L226 Difference]: Without dead ends: 2006 [2021-06-05 16:33:26,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 5024.6ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:33:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-06-05 16:33:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1381. [2021-06-05 16:33:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-06-05 16:33:26,684 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-06-05 16:33:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:26,684 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-06-05 16:33:26,684 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) [2021-06-05 16:33:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-06-05 16:33:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:26,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:26,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:26,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 16:33:26,887 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:26,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-05 16:33:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:26,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323995848] [2021-06-05 16:33:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:27,108 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-06-05 16:33:27,241 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 16:33:27,363 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 16:33:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:27,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:27,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323995848] [2021-06-05 16:33:27,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323995848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:27,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087200311] [2021-06-05 16:33:27,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:27,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:27,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:27,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:28,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:33:28,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-06-05 16:33:28,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:28,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:33:28,033 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:28,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,045 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 33 treesize of output 19 [2021-06-05 16:33:28,046 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:28,052 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:28,058 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:33:28,064 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:33:28,072 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:33:28,078 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:28,085 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:33:28,090 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:28,094 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,169 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-05 16:33:28,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:28,171 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-05 16:33:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:28,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087200311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:28,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:28,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:33:28,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679356407] [2021-06-05 16:33:28,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:28,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:28,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:28,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:28,226 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 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) [2021-06-05 16:33:28,768 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 16:33:29,159 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 16:33:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:30,182 INFO L93 Difference]: Finished difference Result 1960 states and 6315 transitions. [2021-06-05 16:33:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:33:30,182 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 [2021-06-05 16:33:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:30,185 INFO L225 Difference]: With dead ends: 1960 [2021-06-05 16:33:30,185 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 16:33:30,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2329.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:33:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 16:33:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1425. [2021-06-05 16:33:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.3202247191011236) internal successors, (4728), 1424 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4728 transitions. [2021-06-05 16:33:30,205 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4728 transitions. Word has length 26 [2021-06-05 16:33:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:30,205 INFO L482 AbstractCegarLoop]: Abstraction has 1425 states and 4728 transitions. [2021-06-05 16:33:30,205 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) [2021-06-05 16:33:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4728 transitions. [2021-06-05 16:33:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:30,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:30,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:30,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:30,425 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:30,425 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-05 16:33:30,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:30,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864030585] [2021-06-05 16:33:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:31,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864030585] [2021-06-05 16:33:31,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864030585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829748901] [2021-06-05 16:33:31,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:31,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:31,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:33:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:31,476 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 16:33:31,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 41 [2021-06-05 16:33:31,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,735 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 16:33:31,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,759 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:33:31,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 16:33:31,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,915 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 16:33:31,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,938 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:33:31,938 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-05 16:33:31,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,083 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 16:33:32,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,107 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:33:32,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 16:33:32,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,250 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 16:33:32,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-06-05 16:33:32,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,408 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:33:32,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2021-06-05 16:33:32,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,559 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 16:33:32,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,579 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:33:32,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 16:33:32,580 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,710 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 16:33:32,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,738 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:33:32,738 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:33:32,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,866 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:33:32,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:32,900 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:445, output treesize:479 [2021-06-05 16:33:33,184 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-05 16:33:33,410 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-05 16:33:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:33,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829748901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:33,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:33,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:33:33,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481205680] [2021-06-05 16:33:33,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:33,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:33,526 INFO L87 Difference]: Start difference. First operand 1425 states and 4728 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) [2021-06-05 16:33:34,624 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2021-06-05 16:33:35,012 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-06-05 16:33:35,405 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-06-05 16:33:35,728 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 58 [2021-06-05 16:33:35,856 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:33:36,103 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:33:36,580 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-05 16:33:36,987 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-06-05 16:33:37,136 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 16:33:37,471 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-06-05 16:33:37,822 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-06-05 16:33:38,300 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2021-06-05 16:33:38,638 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2021-06-05 16:33:39,216 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-06-05 16:33:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:39,281 INFO L93 Difference]: Finished difference Result 2026 states and 6474 transitions. [2021-06-05 16:33:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:33:39,282 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 [2021-06-05 16:33:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:39,284 INFO L225 Difference]: With dead ends: 2026 [2021-06-05 16:33:39,284 INFO L226 Difference]: Without dead ends: 2011 [2021-06-05 16:33:39,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 6383.0ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:33:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-05 16:33:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1444. [2021-06-05 16:33:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1443 states have (on average 3.324324324324324) internal successors, (4797), 1443 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 4797 transitions. [2021-06-05 16:33:39,312 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 4797 transitions. Word has length 26 [2021-06-05 16:33:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:39,312 INFO L482 AbstractCegarLoop]: Abstraction has 1444 states and 4797 transitions. [2021-06-05 16:33:39,312 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) [2021-06-05 16:33:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 4797 transitions. [2021-06-05 16:33:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:39,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:39,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:39,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-05 16:33:39,515 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:39,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1506197498, now seen corresponding path program 9 times [2021-06-05 16:33:39,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:39,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879451900] [2021-06-05 16:33:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:40,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:40,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879451900] [2021-06-05 16:33:40,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879451900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:40,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73555370] [2021-06-05 16:33:40,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:40,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:40,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:40,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:40,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:40,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:40,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:40,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:33:40,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,014 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 16:33:41,014 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-06-05 16:33:41,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:41,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:41,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:41,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:41,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:41,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:41,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:41,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:41,126 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-05 16:33:41,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:41,129 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-06-05 16:33:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:41,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73555370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:41,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:41,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:41,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785914000] [2021-06-05 16:33:41,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:41,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:41,187 INFO L87 Difference]: Start difference. First operand 1444 states and 4797 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) [2021-06-05 16:33:41,870 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-05 16:33:42,282 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 16:33:42,487 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-06-05 16:33:42,882 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-06-05 16:33:43,203 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 16:33:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:43,286 INFO L93 Difference]: Finished difference Result 2027 states and 6512 transitions. [2021-06-05 16:33:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:33:43,287 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 [2021-06-05 16:33:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:43,290 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 16:33:43,290 INFO L226 Difference]: Without dead ends: 2012 [2021-06-05 16:33:43,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2564.3ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:33:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-05 16:33:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1454. [2021-06-05 16:33:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1453 states have (on average 3.3269098417068137) internal successors, (4834), 1453 states have internal predecessors, (4834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 4834 transitions. [2021-06-05 16:33:43,314 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 4834 transitions. Word has length 26 [2021-06-05 16:33:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:43,315 INFO L482 AbstractCegarLoop]: Abstraction has 1454 states and 4834 transitions. [2021-06-05 16:33:43,315 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) [2021-06-05 16:33:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 4834 transitions. [2021-06-05 16:33:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:43,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:43,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:43,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:43,540 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 10 times [2021-06-05 16:33:43,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:43,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681025848] [2021-06-05 16:33:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:43,759 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-06-05 16:33:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:44,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:44,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681025848] [2021-06-05 16:33:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681025848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540012279] [2021-06-05 16:33:44,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:44,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:44,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:44,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,317 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:44,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:44,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-05 16:33:44,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,349 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:44,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:44,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,365 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:44,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 17 [2021-06-05 16:33:44,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 24 [2021-06-05 16:33:44,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,394 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:44,394 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 [2021-06-05 16:33:44,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:44,405 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 30 treesize of output 16 [2021-06-05 16:33:44,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,420 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 23 treesize of output 18 [2021-06-05 16:33:44,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,436 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:44,436 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 [2021-06-05 16:33:44,436 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,451 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 24 [2021-06-05 16:33:44,456 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,467 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:44,468 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,479 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:44,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:33:44,480 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,494 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:44,494 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 17 [2021-06-05 16:33:44,495 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,506 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:44,506 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 30 treesize of output 16 [2021-06-05 16:33:44,507 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,520 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 42 treesize of output 27 [2021-06-05 16:33:44,521 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:44,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:44,531 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:44,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20 [2021-06-05 16:33:44,532 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:44,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:44,607 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-05 16:33:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:44,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540012279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:44,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:44,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:33:44,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197431912] [2021-06-05 16:33:44,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:44,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:44,811 INFO L87 Difference]: Start difference. First operand 1454 states and 4834 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) [2021-06-05 16:33:46,833 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-06-05 16:33:47,124 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-06-05 16:33:47,362 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 16:33:47,603 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 16:33:47,750 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-05 16:33:47,964 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-06-05 16:33:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:48,091 INFO L93 Difference]: Finished difference Result 2385 states and 7601 transitions. [2021-06-05 16:33:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:33:48,091 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 [2021-06-05 16:33:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:48,094 INFO L225 Difference]: With dead ends: 2385 [2021-06-05 16:33:48,095 INFO L226 Difference]: Without dead ends: 2355 [2021-06-05 16:33:48,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 3397.6ms TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:33:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-06-05 16:33:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1467. [2021-06-05 16:33:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.3342428376534787) internal successors, (4888), 1466 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4888 transitions. [2021-06-05 16:33:48,116 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4888 transitions. Word has length 26 [2021-06-05 16:33:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:48,116 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4888 transitions. [2021-06-05 16:33:48,116 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) [2021-06-05 16:33:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4888 transitions. [2021-06-05 16:33:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:48,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:48,118 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:48,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 16:33:48,318 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 11 times [2021-06-05 16:33:48,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:48,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297403384] [2021-06-05 16:33:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:48,647 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-05 16:33:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:48,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:48,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297403384] [2021-06-05 16:33:48,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297403384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:48,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656887958] [2021-06-05 16:33:48,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:48,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:48,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:49,307 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 16:33:49,506 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2021-06-05 16:33:49,570 INFO L446 ElimStorePlain]: Different costs {1=[A, v_prenex_37], 2=[v_prenex_39, v_prenex_38]} [2021-06-05 16:33:49,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:49,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 16:33:49,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:49,690 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 16:33:49,690 INFO L628 ElimStorePlain]: treesize reduction 54, result has 72.0 percent of original size [2021-06-05 16:33:49,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:49,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:49,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:49,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:49,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:49,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:33:49,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:49,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:49,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:49,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:49,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:49,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:49,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:49,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:49,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:49,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:33:49,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:49,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:49,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:49,837 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:205, output treesize:51 [2021-06-05 16:33:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:49,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656887958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:49,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:49,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:33:49,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537222054] [2021-06-05 16:33:49,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:49,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:49,898 INFO L87 Difference]: Start difference. First operand 1467 states and 4888 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) [2021-06-05 16:33:50,521 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 16:33:50,753 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 16:33:51,094 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2021-06-05 16:33:51,362 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-05 16:33:51,848 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-05 16:33:52,239 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-05 16:33:52,457 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 16:33:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:52,615 INFO L93 Difference]: Finished difference Result 1957 states and 6396 transitions. [2021-06-05 16:33:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:33:52,616 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 [2021-06-05 16:33:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:52,618 INFO L225 Difference]: With dead ends: 1957 [2021-06-05 16:33:52,618 INFO L226 Difference]: Without dead ends: 1942 [2021-06-05 16:33:52,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 3154.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:33:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-06-05 16:33:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1470. [2021-06-05 16:33:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 3.3356024506466984) internal successors, (4900), 1469 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4900 transitions. [2021-06-05 16:33:52,637 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4900 transitions. Word has length 26 [2021-06-05 16:33:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:52,637 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4900 transitions. [2021-06-05 16:33:52,637 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) [2021-06-05 16:33:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4900 transitions. [2021-06-05 16:33:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:52,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:52,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:52,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-05 16:33:52,839 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:52,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1300110838, now seen corresponding path program 12 times [2021-06-05 16:33:52,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:52,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810397192] [2021-06-05 16:33:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:53,217 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-06-05 16:33:53,395 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-05 16:33:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:53,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:53,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810397192] [2021-06-05 16:33:53,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810397192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:53,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023621920] [2021-06-05 16:33:53,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:53,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:53,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:53,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:53,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:53,840 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 16:33:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:53,912 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:53,912 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 28 treesize of output 20 [2021-06-05 16:33:53,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,031 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:33:54,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,043 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 24 [2021-06-05 16:33:54,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,155 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:33:54,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,168 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 33 treesize of output 27 [2021-06-05 16:33:54,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,277 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 16:33:54,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,289 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:54,289 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 17 [2021-06-05 16:33:54,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,393 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:33:54,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,406 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:54,406 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 17 [2021-06-05 16:33:54,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,509 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:33:54,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,521 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 16 treesize of output 18 [2021-06-05 16:33:54,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,632 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 33 treesize of output 27 [2021-06-05 16:33:54,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:54,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:33:54,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:54,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:54,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:54,837 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-05 16:33:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:55,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023621920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:55,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:55,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:55,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462646785] [2021-06-05 16:33:55,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:55,025 INFO L87 Difference]: Start difference. First operand 1470 states and 4900 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) [2021-06-05 16:33:55,365 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 16:33:55,796 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2021-06-05 16:33:56,146 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 16:33:56,421 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:33:56,718 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 16:33:56,922 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 16:33:57,118 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-05 16:33:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:57,212 INFO L93 Difference]: Finished difference Result 2349 states and 7518 transitions. [2021-06-05 16:33:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:33:57,213 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 [2021-06-05 16:33:57,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:57,216 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 16:33:57,216 INFO L226 Difference]: Without dead ends: 2319 [2021-06-05 16:33:57,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2641.0ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:33:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-05 16:33:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1476. [2021-06-05 16:33:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 3.3403389830508474) internal successors, (4927), 1475 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 4927 transitions. [2021-06-05 16:33:57,236 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 4927 transitions. Word has length 26 [2021-06-05 16:33:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:57,236 INFO L482 AbstractCegarLoop]: Abstraction has 1476 states and 4927 transitions. [2021-06-05 16:33:57,236 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) [2021-06-05 16:33:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 4927 transitions. [2021-06-05 16:33:57,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:57,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:57,238 INFO L521 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] [2021-06-05 16:33:57,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:57,439 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:57,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-05 16:33:57,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:57,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306636249] [2021-06-05 16:33:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:57,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:57,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306636249] [2021-06-05 16:33:57,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306636249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:57,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004543169] [2021-06-05 16:33:57,863 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:57,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:33:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,231 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:33:58,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,242 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 27 treesize of output 7 [2021-06-05 16:33:58,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,252 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 16 [2021-06-05 16:33:58,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,263 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 19 [2021-06-05 16:33:58,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,272 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 13 [2021-06-05 16:33:58,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,282 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 19 [2021-06-05 16:33:58,283 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,292 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 19 [2021-06-05 16:33:58,293 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-06-05 16:33:58,303 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,312 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 16 [2021-06-05 16:33:58,313 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 16:33:58,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,342 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 16 [2021-06-05 16:33:58,343 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,355 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 13 [2021-06-05 16:33:58,356 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,368 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 19 [2021-06-05 16:33:58,369 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:33:58,380 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,387 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 13 [2021-06-05 16:33:58,388 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:58,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:58,393 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 13 [2021-06-05 16:33:58,394 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,436 INFO L628 ElimStorePlain]: treesize reduction 48, result has 49.5 percent of original size [2021-06-05 16:33:58,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:58,437 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:921, output treesize:47 [2021-06-05 16:33:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004543169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:58,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:58,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 16:33:58,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398884148] [2021-06-05 16:33:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:33:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:58,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:33:58,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:33:58,519 INFO L87 Difference]: Start difference. First operand 1476 states and 4927 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) [2021-06-05 16:33:59,081 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 16:33:59,391 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 16:33:59,545 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 16:33:59,723 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-06-05 16:34:00,304 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 16:34:00,745 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:34:00,979 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2021-06-05 16:34:01,537 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-06-05 16:34:02,238 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:34:02,418 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-05 16:34:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:02,726 INFO L93 Difference]: Finished difference Result 3196 states and 9983 transitions. [2021-06-05 16:34:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:34:02,727 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 [2021-06-05 16:34:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:02,731 INFO L225 Difference]: With dead ends: 3196 [2021-06-05 16:34:02,731 INFO L226 Difference]: Without dead ends: 3109 [2021-06-05 16:34:02,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 4059.5ms TimeCoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:34:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-06-05 16:34:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1509. [2021-06-05 16:34:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.343501326259947) internal successors, (5042), 1508 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5042 transitions. [2021-06-05 16:34:02,755 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5042 transitions. Word has length 26 [2021-06-05 16:34:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:02,756 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5042 transitions. [2021-06-05 16:34:02,756 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) [2021-06-05 16:34:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5042 transitions. [2021-06-05 16:34:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:02,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:02,758 INFO L521 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] [2021-06-05 16:34:02,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-05 16:34:02,958 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:02,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-05 16:34:02,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:02,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38825616] [2021-06-05 16:34:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:03,313 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-05 16:34:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:03,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:03,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38825616] [2021-06-05 16:34:03,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38825616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:03,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030464076] [2021-06-05 16:34:03,596 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:03,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:03,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:34:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:04,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,300 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 16 [2021-06-05 16:34:04,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,311 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 13 [2021-06-05 16:34:04,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,322 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 37 treesize of output 19 [2021-06-05 16:34:04,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,333 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 25 treesize of output 7 [2021-06-05 16:34:04,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,345 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 19 [2021-06-05 16:34:04,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,356 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 13 [2021-06-05 16:34:04,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,368 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 37 treesize of output 13 [2021-06-05 16:34:04,370 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,380 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 19 [2021-06-05 16:34:04,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,392 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 16 [2021-06-05 16:34:04,393 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,403 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 16:34:04,404 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,414 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 45 treesize of output 16 [2021-06-05 16:34:04,415 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,429 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 19 [2021-06-05 16:34:04,430 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,443 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-05 16:34:04,443 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,453 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 30 treesize of output 13 [2021-06-05 16:34:04,453 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-06-05 16:34:04,464 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:04,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:04,469 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 16 [2021-06-05 16:34:04,470 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:04,510 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-06-05 16:34:04,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:34:04,511 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-06-05 16:34:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030464076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:04,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:04,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:34:04,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944718544] [2021-06-05 16:34:04,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:04,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:04,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:04,579 INFO L87 Difference]: Start difference. First operand 1509 states and 5042 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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) [2021-06-05 16:34:05,101 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 16:34:05,421 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-05 16:34:05,572 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-05 16:34:06,037 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 16:34:06,513 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-06-05 16:34:06,795 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-06-05 16:34:07,279 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2021-06-05 16:34:07,433 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:34:07,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:07,679 INFO L93 Difference]: Finished difference Result 2965 states and 9388 transitions. [2021-06-05 16:34:07,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:34:07,680 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 [2021-06-05 16:34:07,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:07,683 INFO L225 Difference]: With dead ends: 2965 [2021-06-05 16:34:07,683 INFO L226 Difference]: Without dead ends: 2920 [2021-06-05 16:34:07,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3316.3ms TimeCoverageRelationStatistics Valid=535, Invalid=2435, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:34:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-06-05 16:34:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1512. [2021-06-05 16:34:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.345466578424884) internal successors, (5055), 1511 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5055 transitions. [2021-06-05 16:34:07,706 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5055 transitions. Word has length 26 [2021-06-05 16:34:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:07,706 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5055 transitions. [2021-06-05 16:34:07,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) 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) [2021-06-05 16:34:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5055 transitions. [2021-06-05 16:34:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:07,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:07,708 INFO L521 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] [2021-06-05 16:34:07,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 16:34:07,909 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-05 16:34:07,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:07,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226687521] [2021-06-05 16:34:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:08,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:08,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226687521] [2021-06-05 16:34:08,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226687521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:08,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960930921] [2021-06-05 16:34:08,395 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:08,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:34:08,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:34:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:08,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,971 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-05 16:34:08,971 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 36 treesize of output 30 [2021-06-05 16:34:08,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:08,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:08,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:08,998 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 25 treesize of output 45 [2021-06-05 16:34:09,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,033 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-05 16:34:09,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 16:34:09,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,064 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-05 16:34:09,064 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 32 treesize of output 30 [2021-06-05 16:34:09,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,084 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,084 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 [2021-06-05 16:34:09,089 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,115 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-05 16:34:09,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 25 [2021-06-05 16:34:09,117 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,143 INFO L354 Elim1Store]: treesize reduction 26, result has 21.2 percent of original size [2021-06-05 16:34:09,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 16:34:09,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,162 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:34:09,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,180 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,180 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 1 [2021-06-05 16:34:09,181 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,198 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,198 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 41 treesize of output 1 [2021-06-05 16:34:09,199 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,215 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,215 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 34 treesize of output 1 [2021-06-05 16:34:09,216 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,240 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-05 16:34:09,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 16:34:09,242 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,258 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,258 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 [2021-06-05 16:34:09,259 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,275 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,275 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 [2021-06-05 16:34:09,275 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,292 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,293 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 [2021-06-05 16:34:09,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:09,308 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:34:09,308 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 1 [2021-06-05 16:34:09,309 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:09,415 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 16:34:09,415 INFO L628 ElimStorePlain]: treesize reduction 69, result has 64.2 percent of original size [2021-06-05 16:34:09,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:34:09,417 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-06-05 16:34:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:09,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960930921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:09,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:09,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:34:09,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838866422] [2021-06-05 16:34:09,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:09,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:09,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:09,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:09,556 INFO L87 Difference]: Start difference. First operand 1512 states and 5055 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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) [2021-06-05 16:34:10,043 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 16:34:10,158 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 16:34:10,584 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-05 16:34:10,812 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-05 16:34:11,159 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 16:34:11,352 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-05 16:34:11,589 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-06-05 16:34:11,955 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-05 16:34:12,459 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-05 16:34:12,952 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-06-05 16:34:13,205 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-05 16:34:13,371 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-06-05 16:34:13,625 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 16:34:13,850 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-06-05 16:34:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:14,452 INFO L93 Difference]: Finished difference Result 3428 states and 10667 transitions. [2021-06-05 16:34:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:34:14,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 [2021-06-05 16:34:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:14,456 INFO L225 Difference]: With dead ends: 3428 [2021-06-05 16:34:14,456 INFO L226 Difference]: Without dead ends: 3368 [2021-06-05 16:34:14,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4676.4ms TimeCoverageRelationStatistics Valid=833, Invalid=3457, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:34:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-06-05 16:34:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1525. [2021-06-05 16:34:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.356299212598425) internal successors, (5115), 1524 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5115 transitions. [2021-06-05 16:34:14,482 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5115 transitions. Word has length 26 [2021-06-05 16:34:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:14,482 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 5115 transitions. [2021-06-05 16:34:14,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) 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) [2021-06-05 16:34:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5115 transitions. [2021-06-05 16:34:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:14,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:14,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:14,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable682 [2021-06-05 16:34:14,684 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-06-05 16:34:14,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:14,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979505091] [2021-06-05 16:34:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:14,902 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-06-05 16:34:15,039 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-06-05 16:34:15,218 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-05 16:34:15,393 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 16:34:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:15,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:15,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979505091] [2021-06-05 16:34:15,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979505091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:15,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309041601] [2021-06-05 16:34:15,517 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:15,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:15,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:15,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-06-05 16:34:15,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,953 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 28 treesize of output 16 [2021-06-05 16:34:15,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:15,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:34:15,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:34:15,976 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:15,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:15,990 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:15,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:15,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:15,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:16,004 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:34:16,011 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:34:16,019 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:34:16,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:16,033 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:16,039 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:16,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:16,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:34:16,044 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:16,133 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-05 16:34:16,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:34:16,136 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-05 16:34:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:16,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309041601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:16,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:16,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:34:16,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073805786] [2021-06-05 16:34:16,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:16,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:16,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:16,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:16,206 INFO L87 Difference]: Start difference. First operand 1525 states and 5115 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) [2021-06-05 16:34:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:17,057 INFO L93 Difference]: Finished difference Result 1908 states and 6274 transitions. [2021-06-05 16:34:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:34:17,057 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 [2021-06-05 16:34:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:17,060 INFO L225 Difference]: With dead ends: 1908 [2021-06-05 16:34:17,060 INFO L226 Difference]: Without dead ends: 1893 [2021-06-05 16:34:17,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1523.6ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:34:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-06-05 16:34:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1533. [2021-06-05 16:34:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.352480417754569) internal successors, (5136), 1532 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5136 transitions. [2021-06-05 16:34:17,078 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5136 transitions. Word has length 26 [2021-06-05 16:34:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:17,078 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5136 transitions. [2021-06-05 16:34:17,078 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) [2021-06-05 16:34:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5136 transitions. [2021-06-05 16:34:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:17,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:17,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:17,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-05 16:34:17,281 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:17,281 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-06-05 16:34:17,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:17,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043869375] [2021-06-05 16:34:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:17,511 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-05 16:34:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:17,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043869375] [2021-06-05 16:34:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043869375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054375549] [2021-06-05 16:34:17,954 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:17,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:17,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:17,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:34:17,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:18,339 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 16:34:18,430 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_60, v_prenex_62], 3=[A, v_prenex_54, v_prenex_64, v_prenex_58, v_prenex_56, v_prenex_66]} [2021-06-05 16:34:18,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:18,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:34:18,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:18,653 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-06-05 16:34:18,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:18,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:18,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:34:18,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:18,876 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:34:18,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:18,906 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:18,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 [2021-06-05 16:34:18,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,102 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:34:19,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:19,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,127 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:19,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-06-05 16:34:19,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,269 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 16:34:19,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,289 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:34:19,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 26 [2021-06-05 16:34:19,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,424 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:34:19,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:19,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:19,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 28 [2021-06-05 16:34:19,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,586 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:34:19,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:19,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,605 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:34:19,605 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 16:34:19,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,737 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:34:19,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:19,758 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:34:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:19,760 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:19,892 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:34:19,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:19,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:19,907 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:391, output treesize:457 [2021-06-05 16:34:20,219 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-05 16:34:20,432 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 16:34:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:20,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054375549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:20,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:20,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:34:20,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165648100] [2021-06-05 16:34:20,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:20,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:20,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:20,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:20,532 INFO L87 Difference]: Start difference. First operand 1533 states and 5136 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) [2021-06-05 16:34:20,786 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 21 [2021-06-05 16:34:21,547 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2021-06-05 16:34:21,994 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:34:22,176 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 16:34:22,590 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-06-05 16:34:22,772 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:34:23,199 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 16:34:23,646 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-06-05 16:34:24,017 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-06-05 16:34:24,255 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-06-05 16:34:24,754 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-05 16:34:24,992 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 34 [2021-06-05 16:34:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:25,053 INFO L93 Difference]: Finished difference Result 2211 states and 7083 transitions. [2021-06-05 16:34:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:34:25,053 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 [2021-06-05 16:34:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:25,056 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 16:34:25,056 INFO L226 Difference]: Without dead ends: 2181 [2021-06-05 16:34:25,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 5215.8ms TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:34:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-06-05 16:34:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1518. [2021-06-05 16:34:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3513513513513513) internal successors, (5084), 1517 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5084 transitions. [2021-06-05 16:34:25,085 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5084 transitions. Word has length 26 [2021-06-05 16:34:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:25,085 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5084 transitions. [2021-06-05 16:34:25,085 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) [2021-06-05 16:34:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5084 transitions. [2021-06-05 16:34:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:25,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:25,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:25,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:25,308 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 15 times [2021-06-05 16:34:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:25,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387687851] [2021-06-05 16:34:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:25,592 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 16:34:25,865 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-05 16:34:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:26,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387687851] [2021-06-05 16:34:26,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387687851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:26,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973272365] [2021-06-05 16:34:26,036 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:26,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:34:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:26,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:34:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:26,384 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:26,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-06-05 16:34:26,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:34:26,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,421 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:26,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:34:26,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,451 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:26,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:34:26,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-06-05 16:34:26,489 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,510 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:34:26,511 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,521 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:26,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:26,522 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,531 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:26,531 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 22 [2021-06-05 16:34:26,532 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,544 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:26,544 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:26,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,553 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:26,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:26,554 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,573 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:26,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:34:26,577 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,596 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:26,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:34:26,603 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,616 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:26,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:26,617 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,630 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:26,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:26,631 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,643 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:26,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:26,644 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,665 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:26,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:26,667 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:26,787 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:34:26,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:26,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:26,812 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:430 [2021-06-05 16:34:27,047 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 16:34:27,270 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-05 16:34:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:27,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973272365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:27,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:27,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:34:27,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885676137] [2021-06-05 16:34:27,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:27,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:27,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:27,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:27,388 INFO L87 Difference]: Start difference. First operand 1518 states and 5084 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) [2021-06-05 16:34:28,258 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2021-06-05 16:34:28,652 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-05 16:34:29,056 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-06-05 16:34:29,247 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-06-05 16:34:29,503 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 58 [2021-06-05 16:34:29,667 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 16:34:29,891 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-05 16:34:30,157 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:34:30,434 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 16:34:30,716 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 16:34:31,027 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-05 16:34:31,273 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-06-05 16:34:31,597 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-06-05 16:34:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:31,674 INFO L93 Difference]: Finished difference Result 2207 states and 7076 transitions. [2021-06-05 16:34:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:34:31,674 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 [2021-06-05 16:34:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:31,678 INFO L225 Difference]: With dead ends: 2207 [2021-06-05 16:34:31,678 INFO L226 Difference]: Without dead ends: 2192 [2021-06-05 16:34:31,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 4866.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:34:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-05 16:34:31,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1522. [2021-06-05 16:34:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.356344510190664) internal successors, (5105), 1521 states have internal predecessors, (5105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:31,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5105 transitions. [2021-06-05 16:34:31,704 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5105 transitions. Word has length 26 [2021-06-05 16:34:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:31,704 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5105 transitions. [2021-06-05 16:34:31,704 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) [2021-06-05 16:34:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5105 transitions. [2021-06-05 16:34:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:31,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:31,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:31,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:31,917 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 16 times [2021-06-05 16:34:31,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:31,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563439404] [2021-06-05 16:34:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:32,333 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-06-05 16:34:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:32,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:32,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563439404] [2021-06-05 16:34:32,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563439404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:32,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751763232] [2021-06-05 16:34:32,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:32,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:32,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:32,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:34:32,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:32,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:32,824 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 16 treesize of output 18 [2021-06-05 16:34:32,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:32,839 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 33 treesize of output 27 [2021-06-05 16:34:32,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:32,852 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 33 treesize of output 27 [2021-06-05 16:34:32,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:32,865 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 24 [2021-06-05 16:34:32,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,876 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:32,876 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 [2021-06-05 16:34:32,877 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,886 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:32,886 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 33 treesize of output 19 [2021-06-05 16:34:32,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,895 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:32,895 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 [2021-06-05 16:34:32,896 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,905 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:32,905 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 28 treesize of output 16 [2021-06-05 16:34:32,905 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:32,917 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 28 treesize of output 24 [2021-06-05 16:34:32,921 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,932 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:32,933 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 28 treesize of output 20 [2021-06-05 16:34:32,934 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,945 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:32,945 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 21 treesize of output 17 [2021-06-05 16:34:32,946 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,955 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:32,955 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 33 treesize of output 19 [2021-06-05 16:34:32,956 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,967 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:32,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17 [2021-06-05 16:34:32,968 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,985 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:32,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:32,986 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,994 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:32,994 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 16 [2021-06-05 16:34:32,995 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,001 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:33,001 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 [2021-06-05 16:34:33,002 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:33,110 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 16:34:33,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:33,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:33,117 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:705, output treesize:180 [2021-06-05 16:34:33,277 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-06-05 16:34:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:33,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751763232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:33,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:33,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:34:33,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180756299] [2021-06-05 16:34:33,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:34:33,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:34:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:34:33,376 INFO L87 Difference]: Start difference. First operand 1522 states and 5105 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) [2021-06-05 16:34:33,876 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-06-05 16:34:34,308 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 16:34:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:34,347 INFO L93 Difference]: Finished difference Result 2055 states and 6709 transitions. [2021-06-05 16:34:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:34:34,347 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 [2021-06-05 16:34:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:34,351 INFO L225 Difference]: With dead ends: 2055 [2021-06-05 16:34:34,351 INFO L226 Difference]: Without dead ends: 2040 [2021-06-05 16:34:34,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1480.0ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:34:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-05 16:34:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1529. [2021-06-05 16:34:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 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) [2021-06-05 16:34:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-06-05 16:34:34,373 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-06-05 16:34:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:34,373 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-06-05 16:34:34,373 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) [2021-06-05 16:34:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-06-05 16:34:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:34,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:34,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:34,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:34,604 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:34,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 17 times [2021-06-05 16:34:34,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:34,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768014421] [2021-06-05 16:34:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:35,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768014421] [2021-06-05 16:34:35,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768014421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:35,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799596721] [2021-06-05 16:34:35,060 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 [2021-06-05 16:34:35,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:34:35,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:34:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:35,428 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 16:34:35,651 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-05 16:34:35,729 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_76], 2=[A, v_prenex_75]} [2021-06-05 16:34:35,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:34:35,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,839 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 16:34:35,839 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-05 16:34:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:35,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:35,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:35,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:35,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:35,892 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 28 treesize of output 16 [2021-06-05 16:34:35,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:35,896 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 21 treesize of output 13 [2021-06-05 16:34:35,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:35,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:34:35,935 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-05 16:34:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:35,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799596721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:35,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:35,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:34:35,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289495149] [2021-06-05 16:34:35,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:35,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:35,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:35,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:35,992 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 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) [2021-06-05 16:34:36,700 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-06-05 16:34:37,157 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:34:37,503 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 16:34:37,685 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 16:34:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:37,819 INFO L93 Difference]: Finished difference Result 2067 states and 6781 transitions. [2021-06-05 16:34:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:34:37,820 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 [2021-06-05 16:34:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:37,822 INFO L225 Difference]: With dead ends: 2067 [2021-06-05 16:34:37,822 INFO L226 Difference]: Without dead ends: 2052 [2021-06-05 16:34:37,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2300.4ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:34:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-06-05 16:34:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1532. [2021-06-05 16:34:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.357282821685173) internal successors, (5140), 1531 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5140 transitions. [2021-06-05 16:34:37,850 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5140 transitions. Word has length 26 [2021-06-05 16:34:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:37,850 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5140 transitions. [2021-06-05 16:34:37,851 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) [2021-06-05 16:34:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5140 transitions. [2021-06-05 16:34:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:37,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:37,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:38,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-06-05 16:34:38,069 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:38,069 INFO L82 PathProgramCache]: Analyzing trace with hash -808425550, now seen corresponding path program 18 times [2021-06-05 16:34:38,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:38,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799078797] [2021-06-05 16:34:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:38,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799078797] [2021-06-05 16:34:38,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799078797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093271429] [2021-06-05 16:34:38,549 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 [2021-06-05 16:34:38,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:34:38,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:38,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:34:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:39,050 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:34:39,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:39,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:39,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:34:39,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:39,512 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 150 [2021-06-05 16:34:39,512 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-06-05 16:34:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:39,542 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:39,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:34:39,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:39,676 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 16:34:39,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:39,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:39,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:39,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:34:39,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:39,852 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 16:34:39,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:39,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:39,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:34:39,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,119 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-06-05 16:34:40,120 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-06-05 16:34:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:40,140 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:40,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:34:40,142 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,263 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:34:40,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:40,285 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:40,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:40,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,407 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:34:40,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:40,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:40,428 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:40,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 25 [2021-06-05 16:34:40,431 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,545 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:34:40,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:40,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:40,564 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:40,564 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:34:40,565 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,677 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:34:40,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:40,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:40,700 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:365, output treesize:256 [2021-06-05 16:34:40,892 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 16:34:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:41,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093271429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:41,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:41,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:34:41,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320086250] [2021-06-05 16:34:41,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:41,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:41,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:41,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:41,002 INFO L87 Difference]: Start difference. First operand 1532 states and 5140 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) [2021-06-05 16:34:41,691 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-05 16:34:41,988 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 16:34:42,586 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 122 [2021-06-05 16:34:42,848 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 16:34:43,206 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:34:43,765 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-06-05 16:34:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:43,835 INFO L93 Difference]: Finished difference Result 2080 states and 6806 transitions. [2021-06-05 16:34:43,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:34:43,835 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 [2021-06-05 16:34:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:43,838 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 16:34:43,838 INFO L226 Difference]: Without dead ends: 2065 [2021-06-05 16:34:43,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3385.1ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:34:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2021-06-05 16:34:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1529. [2021-06-05 16:34:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.356020942408377) internal successors, (5128), 1528 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) [2021-06-05 16:34:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5128 transitions. [2021-06-05 16:34:43,858 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5128 transitions. Word has length 26 [2021-06-05 16:34:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:43,859 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5128 transitions. [2021-06-05 16:34:43,859 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) [2021-06-05 16:34:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5128 transitions. [2021-06-05 16:34:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:43,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:43,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:44,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable962,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:44,061 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-06-05 16:34:44,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:44,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231383802] [2021-06-05 16:34:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:44,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:44,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231383802] [2021-06-05 16:34:44,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231383802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:44,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881916116] [2021-06-05 16:34:44,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:34:44,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:45,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:34:45,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:34:45,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:34:45,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:45,041 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-06-05 16:34:45,047 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:34:45,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:34:45,060 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:34:45,066 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:45,072 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:45,079 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:45,086 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:45,092 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:34:45,097 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:45,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:45,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:34:45,101 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:45,175 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-05 16:34:45,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:34:45,177 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-05 16:34:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:45,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881916116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:45,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:45,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:34:45,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051573120] [2021-06-05 16:34:45,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:45,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:45,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:45,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:45,228 INFO L87 Difference]: Start difference. First operand 1529 states and 5128 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) [2021-06-05 16:34:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:46,099 INFO L93 Difference]: Finished difference Result 1986 states and 6507 transitions. [2021-06-05 16:34:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:34:46,100 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 [2021-06-05 16:34:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:46,102 INFO L225 Difference]: With dead ends: 1986 [2021-06-05 16:34:46,102 INFO L226 Difference]: Without dead ends: 1965 [2021-06-05 16:34:46,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1345.3ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:34:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-06-05 16:34:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1570. [2021-06-05 16:34:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3524537922243467) internal successors, (5260), 1569 states have internal predecessors, (5260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5260 transitions. [2021-06-05 16:34:46,122 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5260 transitions. Word has length 26 [2021-06-05 16:34:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:46,122 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5260 transitions. [2021-06-05 16:34:46,122 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) [2021-06-05 16:34:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5260 transitions. [2021-06-05 16:34:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:46,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:46,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:46,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 16:34:46,325 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:46,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-06-05 16:34:46,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:46,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230272228] [2021-06-05 16:34:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:46,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:46,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230272228] [2021-06-05 16:34:46,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230272228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:46,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401501121] [2021-06-05 16:34:46,830 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 [2021-06-05 16:34:46,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:46,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:34:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:47,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:47,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:34:47,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,217 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:47,218 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 28 treesize of output 16 [2021-06-05 16:34:47,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,227 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:47,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:47,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,248 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:47,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:34:47,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,270 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:47,271 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 28 treesize of output 24 [2021-06-05 16:34:47,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,293 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:47,293 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 26 treesize of output 28 [2021-06-05 16:34:47,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,305 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:47,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:47,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,315 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:47,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:47,316 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,336 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:47,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:34:47,340 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,358 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:47,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:34:47,360 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,370 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:47,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:47,371 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,380 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:47,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-06-05 16:34:47,381 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,391 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:47,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:34:47,392 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:47,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:34:47,411 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:47,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:34:47,429 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,435 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:47,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:34:47,436 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:47,547 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:34:47,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:47,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:47,560 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:737, output treesize:407 [2021-06-05 16:34:47,797 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 16:34:48,044 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-05 16:34:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:48,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401501121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:48,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:48,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:34:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772083946] [2021-06-05 16:34:48,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:48,162 INFO L87 Difference]: Start difference. First operand 1570 states and 5260 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) [2021-06-05 16:34:48,849 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:34:49,232 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-06-05 16:34:49,416 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 16:34:49,956 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-05 16:34:50,699 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-05 16:34:50,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:50,770 INFO L93 Difference]: Finished difference Result 2168 states and 6948 transitions. [2021-06-05 16:34:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:34:50,770 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 [2021-06-05 16:34:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:50,773 INFO L225 Difference]: With dead ends: 2168 [2021-06-05 16:34:50,773 INFO L226 Difference]: Without dead ends: 2143 [2021-06-05 16:34:50,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 3208.0ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:34:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-05 16:34:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1584. [2021-06-05 16:34:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.360707517372078) internal successors, (5320), 1583 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5320 transitions. [2021-06-05 16:34:50,798 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5320 transitions. Word has length 26 [2021-06-05 16:34:50,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:50,798 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5320 transitions. [2021-06-05 16:34:50,798 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) [2021-06-05 16:34:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5320 transitions. [2021-06-05 16:34:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:50,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:50,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:51,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-05 16:34:51,005 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-06-05 16:34:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:51,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980480197] [2021-06-05 16:34:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:51,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:51,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980480197] [2021-06-05 16:34:51,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980480197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:51,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88081338] [2021-06-05 16:34:51,490 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 [2021-06-05 16:34:51,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:34:51,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:51,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,861 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:51,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:51,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,873 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:51,873 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 17 [2021-06-05 16:34:51,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:51,885 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 24 [2021-06-05 16:34:51,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,895 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:51,895 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 28 treesize of output 16 [2021-06-05 16:34:51,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,907 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:51,908 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 28 treesize of output 20 [2021-06-05 16:34:51,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,918 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:51,918 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 [2021-06-05 16:34:51,919 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:51,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:34:51,933 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,942 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:51,942 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 33 treesize of output 19 [2021-06-05 16:34:51,943 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,951 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:51,951 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 28 treesize of output 16 [2021-06-05 16:34:51,952 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,961 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:51,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:51,962 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:51,972 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 16 treesize of output 18 [2021-06-05 16:34:51,982 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:51,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:51,994 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 33 treesize of output 27 [2021-06-05 16:34:51,996 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:52,007 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:52,007 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 21 treesize of output 17 [2021-06-05 16:34:52,009 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:52,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:52,021 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 28 treesize of output 24 [2021-06-05 16:34:52,025 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:52,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:52,035 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:52,035 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 33 treesize of output 19 [2021-06-05 16:34:52,036 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:52,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:52,042 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:52,042 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 16 [2021-06-05 16:34:52,043 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:52,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:52,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:52,132 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-05 16:34:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:52,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88081338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:52,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:52,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:34:52,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782032809] [2021-06-05 16:34:52,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:52,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:52,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:52,367 INFO L87 Difference]: Start difference. First operand 1584 states and 5320 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) [2021-06-05 16:34:53,219 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-06-05 16:34:53,671 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 16:34:53,911 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 16:34:54,242 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 16:34:54,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:54,320 INFO L93 Difference]: Finished difference Result 2090 states and 6847 transitions. [2021-06-05 16:34:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:34:54,321 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 [2021-06-05 16:34:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:54,324 INFO L225 Difference]: With dead ends: 2090 [2021-06-05 16:34:54,324 INFO L226 Difference]: Without dead ends: 2061 [2021-06-05 16:34:54,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2271.6ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:34:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-05 16:34:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1587. [2021-06-05 16:34:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.3612862547288778) internal successors, (5331), 1586 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5331 transitions. [2021-06-05 16:34:54,352 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5331 transitions. Word has length 26 [2021-06-05 16:34:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:54,352 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5331 transitions. [2021-06-05 16:34:54,352 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) [2021-06-05 16:34:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5331 transitions. [2021-06-05 16:34:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:54,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:54,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:54,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:54,580 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:54,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-06-05 16:34:54,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:54,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578807248] [2021-06-05 16:34:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:54,810 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-05 16:34:54,959 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-06-05 16:34:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:55,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:55,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578807248] [2021-06-05 16:34:55,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578807248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:55,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338547464] [2021-06-05 16:34:55,208 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 [2021-06-05 16:34:55,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:55,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:34:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:55,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:55,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:55,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:55,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:55,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:55,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:55,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:55,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:55,677 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 16:34:55,677 INFO L628 ElimStorePlain]: treesize reduction 121, result has 46.0 percent of original size [2021-06-05 16:34:55,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:55,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:34:55,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:55,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:55,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:55,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:34:55,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:55,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:55,760 INFO L518 ElimStorePlain]: Eliminatee v_prenex_113 vanished before elimination [2021-06-05 16:34:55,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:34:55,762 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:264, output treesize:51 [2021-06-05 16:34:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:55,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338547464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:55,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:55,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:34:55,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480404622] [2021-06-05 16:34:55,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:34:55,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:55,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:34:55,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:34:55,821 INFO L87 Difference]: Start difference. First operand 1587 states and 5331 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) [2021-06-05 16:34:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:56,164 INFO L93 Difference]: Finished difference Result 1662 states and 5522 transitions. [2021-06-05 16:34:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:34:56,164 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 [2021-06-05 16:34:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:56,166 INFO L225 Difference]: With dead ends: 1662 [2021-06-05 16:34:56,166 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 16:34:56,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 827.4ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 16:34:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1593. [2021-06-05 16:34:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.363065326633166) internal successors, (5354), 1592 states have internal predecessors, (5354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5354 transitions. [2021-06-05 16:34:56,184 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5354 transitions. Word has length 26 [2021-06-05 16:34:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:56,184 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5354 transitions. [2021-06-05 16:34:56,184 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) [2021-06-05 16:34:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5354 transitions. [2021-06-05 16:34:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:56,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:56,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:56,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:56,387 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-06-05 16:34:56,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:56,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004207004] [2021-06-05 16:34:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:56,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:56,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004207004] [2021-06-05 16:34:56,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004207004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:56,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498548523] [2021-06-05 16:34:56,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:56,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:34:56,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:56,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:34:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:57,190 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_115, v_prenex_117], 3=[A, v_prenex_119]} [2021-06-05 16:34:57,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,204 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 33 treesize of output 27 [2021-06-05 16:34:57,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:57,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:34:57,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:57,355 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 16:34:57,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,370 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:57,370 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 17 [2021-06-05 16:34:57,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:57,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,383 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 24 [2021-06-05 16:34:57,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:57,513 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:34:57,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,527 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:34:57,527 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 25 treesize of output 19 [2021-06-05 16:34:57,529 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:57,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 16:34:57,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:57,659 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:34:57,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:34:57,677 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:57,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:57,688 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:34:57,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-06-05 16:34:57,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:57,790 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 16:34:57,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:57,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:57,797 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:194 [2021-06-05 16:34:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:58,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498548523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:58,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:58,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:34:58,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227214839] [2021-06-05 16:34:58,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:58,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:58,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:58,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:58,003 INFO L87 Difference]: Start difference. First operand 1593 states and 5354 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) [2021-06-05 16:34:59,248 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-06-05 16:34:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:59,315 INFO L93 Difference]: Finished difference Result 2262 states and 7355 transitions. [2021-06-05 16:34:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:34:59,315 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 [2021-06-05 16:34:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:59,318 INFO L225 Difference]: With dead ends: 2262 [2021-06-05 16:34:59,318 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 16:34:59,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1609.5ms TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:34:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 16:34:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1600. [2021-06-05 16:34:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.367104440275172) internal successors, (5384), 1599 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5384 transitions. [2021-06-05 16:34:59,338 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5384 transitions. Word has length 26 [2021-06-05 16:34:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:59,338 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5384 transitions. [2021-06-05 16:34:59,338 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) [2021-06-05 16:34:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5384 transitions. [2021-06-05 16:34:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:59,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:59,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:59,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 16:34:59,541 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-06-05 16:34:59,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:59,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045067206] [2021-06-05 16:34:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:59,799 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-06-05 16:34:59,936 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-06-05 16:35:00,061 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 16:35:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:00,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045067206] [2021-06-05 16:35:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045067206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:00,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401409532] [2021-06-05 16:35:00,205 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 [2021-06-05 16:35:00,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:35:00,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:35:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:00,620 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:35:00,813 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-05 16:35:00,893 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_129], 2=[A, v_prenex_128]} [2021-06-05 16:35:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:00,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:00,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:01,007 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 16:35:01,008 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-06-05 16:35:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:01,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:01,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:35:01,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:01,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:01,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:01,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:01,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:01,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:01,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:01,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:35:01,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:01,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:01,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:35:01,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-06-05 16:35:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:01,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401409532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:01,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:01,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:35:01,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840044401] [2021-06-05 16:35:01,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:35:01,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:01,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:35:01,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:35:01,166 INFO L87 Difference]: Start difference. First operand 1600 states and 5384 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) [2021-06-05 16:35:02,071 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:35:02,456 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2021-06-05 16:35:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:02,575 INFO L93 Difference]: Finished difference Result 1991 states and 6587 transitions. [2021-06-05 16:35:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:35:02,576 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 [2021-06-05 16:35:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:02,578 INFO L225 Difference]: With dead ends: 1991 [2021-06-05 16:35:02,579 INFO L226 Difference]: Without dead ends: 1976 [2021-06-05 16:35:02,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2123.5ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:35:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-05 16:35:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1611. [2021-06-05 16:35:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3670807453416147) internal successors, (5421), 1610 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5421 transitions. [2021-06-05 16:35:02,598 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5421 transitions. Word has length 26 [2021-06-05 16:35:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:02,598 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5421 transitions. [2021-06-05 16:35:02,598 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) [2021-06-05 16:35:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5421 transitions. [2021-06-05 16:35:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:02,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:02,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:02,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 16:35:02,801 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 25 times [2021-06-05 16:35:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:02,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42181807] [2021-06-05 16:35:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:03,063 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-05 16:35:03,245 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-05 16:35:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:03,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:03,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42181807] [2021-06-05 16:35:03,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42181807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:03,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484040514] [2021-06-05 16:35:03,472 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 [2021-06-05 16:35:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:03,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:35:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,757 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:03,757 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 [2021-06-05 16:35:03,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:03,771 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 42 treesize of output 27 [2021-06-05 16:35:03,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,784 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:03,784 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 [2021-06-05 16:35:03,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,799 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:03,799 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 17 [2021-06-05 16:35:03,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:03,815 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 24 [2021-06-05 16:35:03,816 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,827 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:03,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:35:03,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,838 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:03,838 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 30 treesize of output 16 [2021-06-05 16:35:03,839 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:03,853 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 23 treesize of output 18 [2021-06-05 16:35:03,856 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,869 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:03,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:35:03,870 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:03,883 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 24 [2021-06-05 16:35:03,888 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,905 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:03,905 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 30 treesize of output 16 [2021-06-05 16:35:03,906 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,923 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:03,924 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 [2021-06-05 16:35:03,925 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,944 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:03,944 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 17 [2021-06-05 16:35:03,946 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,961 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:03,961 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 30 treesize of output 16 [2021-06-05 16:35:03,962 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:03,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-06-05 16:35:03,977 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:03,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:03,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 20 [2021-06-05 16:35:03,988 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:04,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:04,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:35:04,065 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-05 16:35:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:04,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484040514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:04,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:04,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:35:04,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622411986] [2021-06-05 16:35:04,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:35:04,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:35:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:35:04,269 INFO L87 Difference]: Start difference. First operand 1611 states and 5421 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) [2021-06-05 16:35:04,924 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-05 16:35:05,113 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 16:35:05,562 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 16:35:05,725 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-06-05 16:35:05,925 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 16:35:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:06,025 INFO L93 Difference]: Finished difference Result 2102 states and 6930 transitions. [2021-06-05 16:35:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:35:06,026 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 [2021-06-05 16:35:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:06,029 INFO L225 Difference]: With dead ends: 2102 [2021-06-05 16:35:06,029 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 16:35:06,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2217.3ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:35:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 16:35:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1612. [2021-06-05 16:35:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 3.3699565487274983) internal successors, (5429), 1611 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5429 transitions. [2021-06-05 16:35:06,050 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5429 transitions. Word has length 26 [2021-06-05 16:35:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:06,050 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 5429 transitions. [2021-06-05 16:35:06,050 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) [2021-06-05 16:35:06,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5429 transitions. [2021-06-05 16:35:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:06,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:06,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:06,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:06,253 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 26 times [2021-06-05 16:35:06,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:06,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093650278] [2021-06-05 16:35:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:06,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:06,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093650278] [2021-06-05 16:35:06,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093650278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:06,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545407171] [2021-06-05 16:35:06,689 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 [2021-06-05 16:35:06,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:06,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:06,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:35:06,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:06,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:06,980 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 28 treesize of output 16 [2021-06-05 16:35:06,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:06,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:06,990 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:06,990 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 28 treesize of output 16 [2021-06-05 16:35:06,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:06,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,001 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:07,001 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 33 treesize of output 19 [2021-06-05 16:35:07,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,016 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:07,016 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 17 [2021-06-05 16:35:07,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:07,052 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 33 treesize of output 27 [2021-06-05 16:35:07,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,068 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:07,068 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 17 [2021-06-05 16:35:07,070 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:07,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:07,083 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:07,097 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 24 [2021-06-05 16:35:07,099 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,110 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:07,110 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 26 treesize of output 16 [2021-06-05 16:35:07,111 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:07,124 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 16 treesize of output 18 [2021-06-05 16:35:07,128 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,139 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:07,139 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 [2021-06-05 16:35:07,140 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:07,151 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 33 treesize of output 27 [2021-06-05 16:35:07,159 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,174 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:07,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:35:07,176 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:07,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:35:07,198 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,208 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:07,208 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 [2021-06-05 16:35:07,209 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:07,216 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:07,216 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 31 treesize of output 19 [2021-06-05 16:35:07,217 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:07,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:07,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:35:07,295 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-05 16:35:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545407171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:07,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:07,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:35:07,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179232554] [2021-06-05 16:35:07,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:35:07,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:07,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:35:07,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:35:07,500 INFO L87 Difference]: Start difference. First operand 1612 states and 5429 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) [2021-06-05 16:35:08,082 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-05 16:35:08,759 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 16:35:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:08,812 INFO L93 Difference]: Finished difference Result 2116 states and 6975 transitions. [2021-06-05 16:35:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:35:08,812 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 [2021-06-05 16:35:08,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:08,815 INFO L225 Difference]: With dead ends: 2116 [2021-06-05 16:35:08,815 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 16:35:08,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1702.1ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:35:08,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 16:35:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1618. [2021-06-05 16:35:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.368583797155226) internal successors, (5447), 1617 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5447 transitions. [2021-06-05 16:35:08,838 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5447 transitions. Word has length 26 [2021-06-05 16:35:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:08,839 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5447 transitions. [2021-06-05 16:35:08,839 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) [2021-06-05 16:35:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5447 transitions. [2021-06-05 16:35:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:08,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:08,842 INFO L521 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] [2021-06-05 16:35:09,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-06-05 16:35:09,057 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:09,057 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-05 16:35:09,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:09,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174957196] [2021-06-05 16:35:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:09,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:09,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174957196] [2021-06-05 16:35:09,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174957196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:09,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136225293] [2021-06-05 16:35:09,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:09,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:35:09,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:09,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:35:09,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:10,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,238 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 30 treesize of output 13 [2021-06-05 16:35:10,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,249 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 13 [2021-06-05 16:35:10,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 19 [2021-06-05 16:35:10,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,273 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 19 [2021-06-05 16:35:10,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 16:35:10,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,296 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 37 treesize of output 13 [2021-06-05 16:35:10,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,309 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 16 [2021-06-05 16:35:10,309 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-06-05 16:35:10,321 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:35:10,333 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,343 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 25 treesize of output 7 [2021-06-05 16:35:10,344 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,356 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 16 [2021-06-05 16:35:10,356 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,367 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 37 treesize of output 19 [2021-06-05 16:35:10,368 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,377 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 16 [2021-06-05 16:35:10,378 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,388 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 19 [2021-06-05 16:35:10,389 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,398 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-05 16:35:10,399 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:10,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:10,404 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 16 [2021-06-05 16:35:10,405 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:10,443 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-06-05 16:35:10,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:35:10,444 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-06-05 16:35:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:10,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136225293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:10,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:10,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:35:10,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985827721] [2021-06-05 16:35:10,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:35:10,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:10,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:35:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:35:10,476 INFO L87 Difference]: Start difference. First operand 1618 states and 5447 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:12,135 INFO L93 Difference]: Finished difference Result 2097 states and 6880 transitions. [2021-06-05 16:35:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:35:12,135 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 [2021-06-05 16:35:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:12,138 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:35:12,138 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 16:35:12,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1976.6ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:35:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 16:35:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1622. [2021-06-05 16:35:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-06-05 16:35:12,159 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-06-05 16:35:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:12,159 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-06-05 16:35:12,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-06-05 16:35:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:12,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:12,161 INFO L521 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] [2021-06-05 16:35:12,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1205 [2021-06-05 16:35:12,361 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-05 16:35:12,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:12,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203607850] [2021-06-05 16:35:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:12,990 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-05 16:35:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:13,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203607850] [2021-06-05 16:35:13,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203607850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:13,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937779618] [2021-06-05 16:35:13,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:35:13,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:13,414 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-05 16:35:13,464 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_132, v_prenex_134], 6=[A, v_prenex_130]} [2021-06-05 16:35:13,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:13,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:13,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:35:13,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:13,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13 [2021-06-05 16:35:13,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,592 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 16:35:13,592 INFO L628 ElimStorePlain]: treesize reduction 180, result has 40.2 percent of original size [2021-06-05 16:35:13,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,596 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 13 treesize of output 7 [2021-06-05 16:35:13,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:13,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:13,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:13,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:35:13,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:13,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:35:13,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:13,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:35:13,706 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:43 [2021-06-05 16:35:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:13,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937779618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:13,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:13,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:35:13,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097794757] [2021-06-05 16:35:13,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:35:13,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:35:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:35:13,756 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 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) [2021-06-05 16:35:15,578 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 16:35:15,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:15,720 INFO L93 Difference]: Finished difference Result 2270 states and 7447 transitions. [2021-06-05 16:35:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:35:15,720 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 [2021-06-05 16:35:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:15,723 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 16:35:15,723 INFO L226 Difference]: Without dead ends: 2255 [2021-06-05 16:35:15,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2367.8ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:35:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-05 16:35:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1622. [2021-06-05 16:35:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.366440468846391) internal successors, (5457), 1621 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5457 transitions. [2021-06-05 16:35:15,746 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5457 transitions. Word has length 26 [2021-06-05 16:35:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:15,746 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5457 transitions. [2021-06-05 16:35:15,746 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) [2021-06-05 16:35:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5457 transitions. [2021-06-05 16:35:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:15,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:15,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:15,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:15,949 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 27 times [2021-06-05 16:35:15,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:15,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004126692] [2021-06-05 16:35:15,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:16,222 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-06-05 16:35:16,382 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 16:35:16,530 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-05 16:35:16,678 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 16:35:16,797 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-06-05 16:35:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:16,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004126692] [2021-06-05 16:35:16,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004126692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463485542] [2021-06-05 16:35:16,831 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 [2021-06-05 16:35:16,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:35:16,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:16,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:35:16,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:17,177 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 16:35:17,358 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:35:17,662 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-06-05 16:35:17,748 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_143, v_prenex_145], 6=[A, v_prenex_147]} [2021-06-05 16:35:17,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:17,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:17,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:17,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:17,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:17,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:17,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:17,769 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:17,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:17,996 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 16:35:17,997 INFO L628 ElimStorePlain]: treesize reduction 147, result has 51.5 percent of original size [2021-06-05 16:35:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:18,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:18,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:35:18,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:18,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:18,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:18,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:18,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:18,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:18,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:18,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:18,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:18,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:35:18,135 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:18,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:18,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:35:18,187 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:341, output treesize:61 [2021-06-05 16:35:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:18,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463485542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:18,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:18,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:35:18,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711016136] [2021-06-05 16:35:18,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:35:18,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:18,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:35:18,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:35:18,250 INFO L87 Difference]: Start difference. First operand 1622 states and 5457 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) [2021-06-05 16:35:18,696 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 16:35:19,024 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 16:35:19,195 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-06-05 16:35:19,676 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2021-06-05 16:35:20,283 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-06-05 16:35:20,821 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 89 [2021-06-05 16:35:21,494 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 87 [2021-06-05 16:35:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:21,609 INFO L93 Difference]: Finished difference Result 2122 states and 6912 transitions. [2021-06-05 16:35:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:35:21,609 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 [2021-06-05 16:35:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:21,612 INFO L225 Difference]: With dead ends: 2122 [2021-06-05 16:35:21,612 INFO L226 Difference]: Without dead ends: 2107 [2021-06-05 16:35:21,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4276.6ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:35:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-06-05 16:35:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1633. [2021-06-05 16:35:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.3670343137254903) internal successors, (5495), 1632 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5495 transitions. [2021-06-05 16:35:21,632 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5495 transitions. Word has length 26 [2021-06-05 16:35:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:21,632 INFO L482 AbstractCegarLoop]: Abstraction has 1633 states and 5495 transitions. [2021-06-05 16:35:21,632 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) [2021-06-05 16:35:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5495 transitions. [2021-06-05 16:35:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:21,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:21,634 INFO L521 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] [2021-06-05 16:35:21,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-06-05 16:35:21,834 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:21,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-05 16:35:21,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:21,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209011455] [2021-06-05 16:35:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:22,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:22,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209011455] [2021-06-05 16:35:22,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209011455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:22,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677042022] [2021-06-05 16:35:22,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:22,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:35:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:22,819 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-05 16:35:23,170 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_158], 6=[v_prenex_160, v_prenex_162]} [2021-06-05 16:35:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,195 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:35:23,196 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 25 treesize of output 27 [2021-06-05 16:35:23,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,221 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:35:23,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:35:23,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:23,410 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:35:23,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,432 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:35:23,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 16:35:23,434 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:23,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 18 treesize of output 28 [2021-06-05 16:35:23,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:23,630 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 16:35:23,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:23,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:23,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:23,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:23,653 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-05 16:35:23,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:23,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:23,678 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:35:23,678 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 32 treesize of output 26 [2021-06-05 16:35:23,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:23,835 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 16:35:23,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:23,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:23,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:23,861 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:35:23,861 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 34 treesize of output 30 [2021-06-05 16:35:23,863 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:23,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:23,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:23,881 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:35:23,881 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 34 treesize of output 30 [2021-06-05 16:35:23,884 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:24,020 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 16:35:24,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:24,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:35:24,036 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:433, output treesize:343 [2021-06-05 16:35:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:24,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677042022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:24,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:24,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:35:24,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083643621] [2021-06-05 16:35:24,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:35:24,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:24,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:35:24,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:35:24,196 INFO L87 Difference]: Start difference. First operand 1633 states and 5495 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) [2021-06-05 16:35:24,866 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-06-05 16:35:26,531 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-06-05 16:35:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:27,135 INFO L93 Difference]: Finished difference Result 2550 states and 8113 transitions. [2021-06-05 16:35:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:35:27,135 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 [2021-06-05 16:35:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:27,138 INFO L225 Difference]: With dead ends: 2550 [2021-06-05 16:35:27,138 INFO L226 Difference]: Without dead ends: 2506 [2021-06-05 16:35:27,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3328.5ms TimeCoverageRelationStatistics Valid=511, Invalid=2459, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:35:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2021-06-05 16:35:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 1640. [2021-06-05 16:35:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.36790726052471) internal successors, (5520), 1639 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5520 transitions. [2021-06-05 16:35:27,161 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5520 transitions. Word has length 26 [2021-06-05 16:35:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:27,161 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5520 transitions. [2021-06-05 16:35:27,161 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) [2021-06-05 16:35:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5520 transitions. [2021-06-05 16:35:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:27,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:27,164 INFO L521 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] [2021-06-05 16:35:27,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:27,372 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:27,372 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-06-05 16:35:27,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:27,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763878490] [2021-06-05 16:35:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:27,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:27,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763878490] [2021-06-05 16:35:27,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763878490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:27,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286896080] [2021-06-05 16:35:27,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:27,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:35:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:35:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:28,268 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:35:28,515 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:35:28,834 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:35:29,243 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:35:29,243 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 33 treesize of output 59 [2021-06-05 16:35:29,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:29,299 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-05 16:35:29,300 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 33 treesize of output 38 [2021-06-05 16:35:29,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:30,411 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 175 DAG size of output: 169 [2021-06-05 16:35:30,412 INFO L628 ElimStorePlain]: treesize reduction 23, result has 97.5 percent of original size [2021-06-05 16:35:30,483 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 16:35:30,483 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 33 treesize of output 51 [2021-06-05 16:35:30,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:30,539 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-05 16:35:30,539 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 28 treesize of output 44 [2021-06-05 16:35:30,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:31,089 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 16:35:31,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:31,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:31,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 67 [2021-06-05 16:35:31,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:31,220 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-06-05 16:35:31,221 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 43 [2021-06-05 16:35:31,226 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:32,896 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 185 DAG size of output: 168 [2021-06-05 16:35:32,897 INFO L628 ElimStorePlain]: treesize reduction 92, result has 90.6 percent of original size [2021-06-05 16:35:32,967 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:35:32,967 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 59 [2021-06-05 16:35:32,977 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:33,045 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-06-05 16:35:33,045 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 63 [2021-06-05 16:35:33,058 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,166 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 181 DAG size of output: 172 [2021-06-05 16:35:34,167 INFO L628 ElimStorePlain]: treesize reduction 83, result has 91.5 percent of original size [2021-06-05 16:35:34,231 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 16:35:34,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-06-05 16:35:34,239 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:34,281 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 21 treesize of output 61 [2021-06-05 16:35:34,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,853 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-05 16:35:34,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:34,922 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:35:34,922 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 33 treesize of output 59 [2021-06-05 16:35:34,931 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,988 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:35:34,989 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 28 treesize of output 56 [2021-06-05 16:35:35,008 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:36,008 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 152 [2021-06-05 16:35:36,009 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.8 percent of original size [2021-06-05 16:35:36,074 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-05 16:35:36,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-06-05 16:35:36,089 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:36,142 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-05 16:35:36,142 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 31 treesize of output 51 [2021-06-05 16:35:36,146 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:36,643 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-06-05 16:35:36,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:36,696 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-05 16:35:36,696 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 28 treesize of output 44 [2021-06-05 16:35:36,700 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:36,756 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-05 16:35:36,757 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 28 treesize of output 56 [2021-06-05 16:35:36,775 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:37,652 WARN L205 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 136 [2021-06-05 16:35:37,653 INFO L628 ElimStorePlain]: treesize reduction 68, result has 91.9 percent of original size [2021-06-05 16:35:37,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-05 16:35:37,776 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:913, output treesize:2294 [2021-06-05 16:35:38,484 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 69 [2021-06-05 16:35:38,659 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 16:35:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:38,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286896080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:38,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:38,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 16:35:38,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394650519] [2021-06-05 16:35:38,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:35:38,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:35:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:35:38,689 INFO L87 Difference]: Start difference. First operand 1640 states and 5520 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:41,289 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 16:35:41,699 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 16:35:42,443 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 89 [2021-06-05 16:35:42,851 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-05 16:35:43,231 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 16:35:43,402 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 33 [2021-06-05 16:35:44,044 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 90 [2021-06-05 16:35:44,561 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 92 [2021-06-05 16:35:45,525 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 96 [2021-06-05 16:35:45,946 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 16:35:46,193 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-06-05 16:35:46,353 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2021-06-05 16:35:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:46,494 INFO L93 Difference]: Finished difference Result 3086 states and 9767 transitions. [2021-06-05 16:35:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:35:46,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:46,499 INFO L225 Difference]: With dead ends: 3086 [2021-06-05 16:35:46,499 INFO L226 Difference]: Without dead ends: 3056 [2021-06-05 16:35:46,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 8412.8ms TimeCoverageRelationStatistics Valid=696, Invalid=4134, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:35:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-05 16:35:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 1671. [2021-06-05 16:35:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.3748502994011975) internal successors, (5636), 1670 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:46,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5636 transitions. [2021-06-05 16:35:46,528 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5636 transitions. Word has length 26 [2021-06-05 16:35:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:46,528 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5636 transitions. [2021-06-05 16:35:46,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5636 transitions. [2021-06-05 16:35:46,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:46,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:46,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:46,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:46,753 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1936410854, now seen corresponding path program 28 times [2021-06-05 16:35:46,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:46,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417008852] [2021-06-05 16:35:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:47,013 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 16:35:47,124 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-06-05 16:35:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:47,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:47,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417008852] [2021-06-05 16:35:47,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417008852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:47,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433983338] [2021-06-05 16:35:47,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:47,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:47,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:47,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:35:47,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:47,820 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:35:48,073 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-05 16:35:48,145 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_185], 2=[v_prenex_186, v_prenex_187], 3=[A]} [2021-06-05 16:35:48,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:48,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:48,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,280 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 16:35:48,281 INFO L628 ElimStorePlain]: treesize reduction 94, result has 60.3 percent of original size [2021-06-05 16:35:48,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:48,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:48,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:48,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:48,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:48,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:48,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:48,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:48,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:48,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:48,342 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:48,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:48,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:35:48,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:48,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:35:48,430 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:251, output treesize:56 [2021-06-05 16:35:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:48,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433983338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:48,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:48,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:35:48,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831010765] [2021-06-05 16:35:48,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:35:48,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:48,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:35:48,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:35:48,488 INFO L87 Difference]: Start difference. First operand 1671 states and 5636 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) [2021-06-05 16:35:48,885 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 16:35:49,143 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-05 16:35:49,990 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 16:35:50,131 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 16:35:50,369 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 16:35:50,622 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2021-06-05 16:35:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:50,812 INFO L93 Difference]: Finished difference Result 2244 states and 7296 transitions. [2021-06-05 16:35:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:35:50,812 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 [2021-06-05 16:35:50,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:50,815 INFO L225 Difference]: With dead ends: 2244 [2021-06-05 16:35:50,815 INFO L226 Difference]: Without dead ends: 2229 [2021-06-05 16:35:50,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2849.1ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:35:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-06-05 16:35:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1676. [2021-06-05 16:35:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3761194029850747) internal successors, (5655), 1675 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5655 transitions. [2021-06-05 16:35:50,834 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5655 transitions. Word has length 26 [2021-06-05 16:35:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:50,834 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5655 transitions. [2021-06-05 16:35:50,834 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) [2021-06-05 16:35:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5655 transitions. [2021-06-05 16:35:50,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:50,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:50,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:51,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:51,037 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash 318878074, now seen corresponding path program 29 times [2021-06-05 16:35:51,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:51,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045972706] [2021-06-05 16:35:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:51,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:51,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045972706] [2021-06-05 16:35:51,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045972706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:51,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492721681] [2021-06-05 16:35:51,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:51,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:35:51,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:51,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:35:51,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:51,918 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 16:35:52,126 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:35:52,180 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_195, v_prenex_197, v_prenex_199, v_prenex_200, v_prenex_201], 3=[v_prenex_196, v_prenex_198]} [2021-06-05 16:35:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,195 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:35:52,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,322 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:35:52,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,336 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 33 treesize of output 27 [2021-06-05 16:35:52,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,473 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 16:35:52,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:35:52,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,626 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:35:52,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,638 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 28 treesize of output 24 [2021-06-05 16:35:52,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,755 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:35:52,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,767 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 33 treesize of output 27 [2021-06-05 16:35:52,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,876 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:35:52,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,888 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:52,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17 [2021-06-05 16:35:52,890 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,995 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:35:52,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:53,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:53,007 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:35:53,007 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 23 treesize of output 19 [2021-06-05 16:35:53,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:53,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:53,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:53,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:53,116 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 18 treesize of output 20 [2021-06-05 16:35:53,119 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:53,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:53,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:35:53,218 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-06-05 16:35:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:53,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492721681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:53,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:53,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:35:53,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328724285] [2021-06-05 16:35:53,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:35:53,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:53,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:35:53,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:35:53,409 INFO L87 Difference]: Start difference. First operand 1676 states and 5655 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) [2021-06-05 16:35:53,751 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 16:35:54,852 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-05 16:35:55,407 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2021-06-05 16:35:55,834 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-06-05 16:35:56,281 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-06-05 16:35:56,800 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 110 [2021-06-05 16:35:57,297 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-06-05 16:35:57,550 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 16:35:57,904 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-05 16:35:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:58,076 INFO L93 Difference]: Finished difference Result 2686 states and 8637 transitions. [2021-06-05 16:35:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:35:58,077 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 [2021-06-05 16:35:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:58,080 INFO L225 Difference]: With dead ends: 2686 [2021-06-05 16:35:58,081 INFO L226 Difference]: Without dead ends: 2652 [2021-06-05 16:35:58,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 4754.7ms TimeCoverageRelationStatistics Valid=371, Invalid=1435, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:35:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-06-05 16:35:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1683. [2021-06-05 16:35:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.381688466111772) internal successors, (5688), 1682 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5688 transitions. [2021-06-05 16:35:58,105 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5688 transitions. Word has length 26 [2021-06-05 16:35:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:58,105 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5688 transitions. [2021-06-05 16:35:58,105 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) [2021-06-05 16:35:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5688 transitions. [2021-06-05 16:35:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:58,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:58,107 INFO L521 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] [2021-06-05 16:35:58,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-06-05 16:35:58,307 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:58,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-06-05 16:35:58,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:58,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256393256] [2021-06-05 16:35:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:58,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:58,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256393256] [2021-06-05 16:35:58,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256393256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:58,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362624771] [2021-06-05 16:35:58,701 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 [2021-06-05 16:35:58,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:58,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:35:58,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:59,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 16:35:59,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:35:59,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,329 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:35:59,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,342 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 16 [2021-06-05 16:35:59,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,355 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 16 [2021-06-05 16:35:59,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,368 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 37 treesize of output 19 [2021-06-05 16:35:59,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 19 [2021-06-05 16:35:59,382 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,394 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 19 [2021-06-05 16:35:59,395 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,405 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 16 [2021-06-05 16:35:59,406 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,415 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 25 treesize of output 13 [2021-06-05 16:35:59,416 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-06-05 16:35:59,426 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,434 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:35:59,435 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,445 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 19 [2021-06-05 16:35:59,446 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,455 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 19 [2021-06-05 16:35:59,457 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,468 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 19 [2021-06-05 16:35:59,469 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,476 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 16 [2021-06-05 16:35:59,477 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,573 INFO L628 ElimStorePlain]: treesize reduction 237, result has 13.5 percent of original size [2021-06-05 16:35:59,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:35:59,574 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-06-05 16:35:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:59,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362624771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:59,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:59,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:35:59,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149336145] [2021-06-05 16:35:59,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:35:59,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:35:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:35:59,626 INFO L87 Difference]: Start difference. First operand 1683 states and 5688 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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) [2021-06-05 16:36:00,332 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-06-05 16:36:00,457 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-06-05 16:36:01,059 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-05 16:36:01,727 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 16:36:01,848 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-05 16:36:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:02,451 INFO L93 Difference]: Finished difference Result 3384 states and 10825 transitions. [2021-06-05 16:36:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:36:02,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 [2021-06-05 16:36:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:02,456 INFO L225 Difference]: With dead ends: 3384 [2021-06-05 16:36:02,456 INFO L226 Difference]: Without dead ends: 3348 [2021-06-05 16:36:02,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 2858.9ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:36:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-06-05 16:36:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 1796. [2021-06-05 16:36:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 3.403899721448468) internal successors, (6110), 1795 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6110 transitions. [2021-06-05 16:36:02,484 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6110 transitions. Word has length 26 [2021-06-05 16:36:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:02,484 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 6110 transitions. [2021-06-05 16:36:02,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) 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) [2021-06-05 16:36:02,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6110 transitions. [2021-06-05 16:36:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:02,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:02,487 INFO L521 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] [2021-06-05 16:36:02,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:02,687 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:02,688 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-06-05 16:36:02,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:02,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916728426] [2021-06-05 16:36:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:03,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916728426] [2021-06-05 16:36:03,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916728426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40389401] [2021-06-05 16:36:03,209 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 [2021-06-05 16:36:03,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:36:03,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:03,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:36:03,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,749 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-05 16:36:03,749 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 37 [2021-06-05 16:36:03,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,786 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-05 16:36:03,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2021-06-05 16:36:03,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,817 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-05 16:36:03,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 16:36:03,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,848 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-05 16:36:03,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-05 16:36:03,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,877 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-05 16:36:03,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 28 [2021-06-05 16:36:03,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,898 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:36:03,898 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 1 [2021-06-05 16:36:03,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,925 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-05 16:36:03,925 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 43 treesize of output 28 [2021-06-05 16:36:03,926 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,944 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:36:03,944 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 [2021-06-05 16:36:03,945 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,963 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:36:03,963 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 1 [2021-06-05 16:36:03,964 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,981 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:36:03,981 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 37 treesize of output 1 [2021-06-05 16:36:03,982 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:03,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,008 INFO L354 Elim1Store]: treesize reduction 23, result has 30.3 percent of original size [2021-06-05 16:36:04,008 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 32 treesize of output 25 [2021-06-05 16:36:04,009 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,025 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:36:04,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2021-06-05 16:36:04,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,044 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:36:04,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-05 16:36:04,044 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,061 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:36:04,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:36:04,062 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,086 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 25 treesize of output 45 [2021-06-05 16:36:04,092 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,102 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:36:04,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:36:04,103 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,286 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-06-05 16:36:04,286 INFO L628 ElimStorePlain]: treesize reduction 116, result has 51.7 percent of original size [2021-06-05 16:36:04,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:36:04,288 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:841, output treesize:133 [2021-06-05 16:36:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:04,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40389401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:04,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:04,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:36:04,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860545528] [2021-06-05 16:36:04,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:36:04,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:04,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:36:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:04,426 INFO L87 Difference]: Start difference. First operand 1796 states and 6110 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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) [2021-06-05 16:36:05,764 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-06-05 16:36:05,992 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 16:36:06,297 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 16:36:06,544 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 16:36:06,773 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 16:36:07,290 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-06-05 16:36:07,560 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 16:36:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:07,829 INFO L93 Difference]: Finished difference Result 3832 states and 12118 transitions. [2021-06-05 16:36:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:36:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 [2021-06-05 16:36:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:07,834 INFO L225 Difference]: With dead ends: 3832 [2021-06-05 16:36:07,834 INFO L226 Difference]: Without dead ends: 3775 [2021-06-05 16:36:07,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3500.2ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:36:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-05 16:36:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 1819. [2021-06-05 16:36:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 3.407590759075908) internal successors, (6195), 1818 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 6195 transitions. [2021-06-05 16:36:07,864 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 6195 transitions. Word has length 26 [2021-06-05 16:36:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:07,864 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 6195 transitions. [2021-06-05 16:36:07,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) 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) [2021-06-05 16:36:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 6195 transitions. [2021-06-05 16:36:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:07,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:07,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:08,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-05 16:36:08,067 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:08,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 30 times [2021-06-05 16:36:08,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:08,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737389731] [2021-06-05 16:36:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:08,372 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 16:36:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:08,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:08,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737389731] [2021-06-05 16:36:08,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737389731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:08,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071314876] [2021-06-05 16:36:08,710 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 [2021-06-05 16:36:08,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:08,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:08,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:36:08,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:09,246 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:36:09,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:09,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:09,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:36:09,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:09,900 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-05 16:36:09,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:09,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:09,922 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:09,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:36:09,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,071 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:36:10,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,096 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:10,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:36:10,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,247 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 16:36:10,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,272 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:10,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:36:10,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,431 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 16:36:10,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,455 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:10,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:36:10,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,601 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 16:36:10,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,621 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:10,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:36:10,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,762 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 16:36:10,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:36:10,783 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,925 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:36:10,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-06-05 16:36:10,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:11,084 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:36:11,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:11,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:36:11,106 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:373, output treesize:497 [2021-06-05 16:36:11,421 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 16:36:11,678 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 16:36:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:11,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071314876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:11,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:11,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:36:11,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854929603] [2021-06-05 16:36:11,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:36:11,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:11,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:36:11,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:11,801 INFO L87 Difference]: Start difference. First operand 1819 states and 6195 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) [2021-06-05 16:36:12,048 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-06-05 16:36:12,267 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 16:36:12,847 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-05 16:36:13,030 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2021-06-05 16:36:13,391 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2021-06-05 16:36:13,723 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-05 16:36:14,316 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-06-05 16:36:14,819 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 16:36:15,234 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-06-05 16:36:15,511 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-05 16:36:16,083 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 83 [2021-06-05 16:36:16,309 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:36:16,557 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 16:36:17,071 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2021-06-05 16:36:17,729 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2021-06-05 16:36:18,190 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 133 [2021-06-05 16:36:19,084 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 140 [2021-06-05 16:36:19,491 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2021-06-05 16:36:19,924 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-06-05 16:36:20,324 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 44 [2021-06-05 16:36:20,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:20,386 INFO L93 Difference]: Finished difference Result 2671 states and 8693 transitions. [2021-06-05 16:36:20,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:36:20,386 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 [2021-06-05 16:36:20,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:20,389 INFO L225 Difference]: With dead ends: 2671 [2021-06-05 16:36:20,389 INFO L226 Difference]: Without dead ends: 2637 [2021-06-05 16:36:20,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 9264.5ms TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:36:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-05 16:36:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1837. [2021-06-05 16:36:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.411764705882353) internal successors, (6264), 1836 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6264 transitions. [2021-06-05 16:36:20,414 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6264 transitions. Word has length 26 [2021-06-05 16:36:20,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:20,414 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6264 transitions. [2021-06-05 16:36:20,414 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) [2021-06-05 16:36:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6264 transitions. [2021-06-05 16:36:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:20,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:20,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:20,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1885 [2021-06-05 16:36:20,617 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash 461518918, now seen corresponding path program 31 times [2021-06-05 16:36:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:20,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532578582] [2021-06-05 16:36:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:21,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:21,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532578582] [2021-06-05 16:36:21,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532578582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:21,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683922811] [2021-06-05 16:36:21,019 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 [2021-06-05 16:36:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:21,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:36:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:21,256 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 43 treesize of output 31 [2021-06-05 16:36:21,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,266 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:21,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:36:21,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:21,278 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 40 treesize of output 28 [2021-06-05 16:36:21,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,294 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:21,295 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 29 treesize of output 23 [2021-06-05 16:36:21,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,309 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:21,309 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 29 treesize of output 23 [2021-06-05 16:36:21,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:21,320 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 45 treesize of output 25 [2021-06-05 16:36:21,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:21,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-05 16:36:21,332 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-06-05 16:36:21,342 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,351 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:21,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-05 16:36:21,352 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,362 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:21,362 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 45 treesize of output 27 [2021-06-05 16:36:21,362 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,372 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:21,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:36:21,373 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:21,386 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 24 treesize of output 24 [2021-06-05 16:36:21,389 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:21,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 16:36:21,403 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:21,415 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 45 treesize of output 31 [2021-06-05 16:36:21,417 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,429 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:21,429 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 38 treesize of output 24 [2021-06-05 16:36:21,430 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:21,436 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:21,436 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 42 treesize of output 22 [2021-06-05 16:36:21,437 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:21,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:21,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:36:21,530 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:221 [2021-06-05 16:36:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:21,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683922811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:21,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:21,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:36:21,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029875461] [2021-06-05 16:36:21,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:21,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:21,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:21,743 INFO L87 Difference]: Start difference. First operand 1837 states and 6264 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) [2021-06-05 16:36:22,624 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 16:36:23,546 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 16:36:23,914 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 16:36:24,104 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-06-05 16:36:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:24,268 INFO L93 Difference]: Finished difference Result 2618 states and 8665 transitions. [2021-06-05 16:36:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:36:24,268 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 [2021-06-05 16:36:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:24,272 INFO L225 Difference]: With dead ends: 2618 [2021-06-05 16:36:24,272 INFO L226 Difference]: Without dead ends: 2584 [2021-06-05 16:36:24,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2531.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:36:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-06-05 16:36:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1832. [2021-06-05 16:36:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.409612233752048) internal successors, (6243), 1831 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6243 transitions. [2021-06-05 16:36:24,298 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6243 transitions. Word has length 26 [2021-06-05 16:36:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:24,298 INFO L482 AbstractCegarLoop]: Abstraction has 1832 states and 6243 transitions. [2021-06-05 16:36:24,298 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) [2021-06-05 16:36:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6243 transitions. [2021-06-05 16:36:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:24,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:24,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:24,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:24,501 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 32 times [2021-06-05 16:36:24,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:24,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292302282] [2021-06-05 16:36:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:24,704 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 16:36:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:24,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:24,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292302282] [2021-06-05 16:36:24,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292302282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:24,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755482763] [2021-06-05 16:36:24,980 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 [2021-06-05 16:36:25,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:25,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:25,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:36:25,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:25,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:25,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-06-05 16:36:25,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:25,436 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:25,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:36:25,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:25,579 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 16:36:25,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:25,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:25,597 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:36:25,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:25,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:25,612 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 33 treesize of output 35 [2021-06-05 16:36:25,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:25,770 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:36:25,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:25,806 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:25,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:36:25,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:25,831 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:25,832 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:36:25,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:25,994 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:36:25,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:26,014 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:26,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:36:26,016 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:26,031 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:36:26,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:26,159 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:36:26,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:26,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:36:26,189 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:349, output treesize:430 [2021-06-05 16:36:26,465 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 16:36:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:26,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755482763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:26,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:26,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:36:26,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489861717] [2021-06-05 16:36:26,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:36:26,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:26,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:36:26,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:26,743 INFO L87 Difference]: Start difference. First operand 1832 states and 6243 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) [2021-06-05 16:36:26,922 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 27 [2021-06-05 16:36:27,420 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 16:36:27,566 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-06-05 16:36:27,799 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-05 16:36:28,437 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 16:36:28,811 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-06-05 16:36:29,098 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2021-06-05 16:36:29,485 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 16:36:29,887 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-05 16:36:30,174 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 16:36:30,479 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2021-06-05 16:36:30,823 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-05 16:36:31,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:31,145 INFO L93 Difference]: Finished difference Result 2647 states and 8625 transitions. [2021-06-05 16:36:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:36:31,145 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 [2021-06-05 16:36:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:31,149 INFO L225 Difference]: With dead ends: 2647 [2021-06-05 16:36:31,149 INFO L226 Difference]: Without dead ends: 2578 [2021-06-05 16:36:31,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 4804.1ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:36:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-06-05 16:36:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1826. [2021-06-05 16:36:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.4076712328767123) internal successors, (6219), 1825 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6219 transitions. [2021-06-05 16:36:31,173 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6219 transitions. Word has length 26 [2021-06-05 16:36:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:31,173 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6219 transitions. [2021-06-05 16:36:31,173 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) [2021-06-05 16:36:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6219 transitions. [2021-06-05 16:36:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:31,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:31,175 INFO L521 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] [2021-06-05 16:36:31,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1963,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:31,377 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-06-05 16:36:31,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:31,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071564135] [2021-06-05 16:36:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:31,636 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-06-05 16:36:31,785 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-06-05 16:36:31,935 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-06-05 16:36:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:32,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:32,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071564135] [2021-06-05 16:36:32,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071564135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:32,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046234028] [2021-06-05 16:36:32,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:32,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:36:32,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:36:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:32,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,702 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 30 treesize of output 16 [2021-06-05 16:36:32,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,709 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 13 [2021-06-05 16:36:32,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:36:32,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,724 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:36:32,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:36:32,732 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,738 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 30 treesize of output 16 [2021-06-05 16:36:32,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,746 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:36:32,746 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,753 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 13 [2021-06-05 16:36:32,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,764 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 16 [2021-06-05 16:36:32,765 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,772 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 23 treesize of output 7 [2021-06-05 16:36:32,773 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-06-05 16:36:32,780 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,787 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 41 treesize of output 16 [2021-06-05 16:36:32,787 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:36:32,796 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,802 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 16 [2021-06-05 16:36:32,803 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,810 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 35 treesize of output 19 [2021-06-05 16:36:32,810 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,814 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 19 [2021-06-05 16:36:32,815 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,848 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-06-05 16:36:32,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:36:32,849 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:21 [2021-06-05 16:36:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:32,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046234028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:32,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:32,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:36:32,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428462388] [2021-06-05 16:36:32,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:36:32,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:32,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:36:32,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:36:32,879 INFO L87 Difference]: Start difference. First operand 1826 states and 6219 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) [2021-06-05 16:36:33,432 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-05 16:36:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:34,568 INFO L93 Difference]: Finished difference Result 2336 states and 7723 transitions. [2021-06-05 16:36:34,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:36:34,568 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 [2021-06-05 16:36:34,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:34,571 INFO L225 Difference]: With dead ends: 2336 [2021-06-05 16:36:34,572 INFO L226 Difference]: Without dead ends: 2314 [2021-06-05 16:36:34,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2123.9ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:36:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-05 16:36:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1818. [2021-06-05 16:36:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-06-05 16:36:34,593 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-06-05 16:36:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:34,593 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-06-05 16:36:34,593 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) [2021-06-05 16:36:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-06-05 16:36:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:34,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:34,595 INFO L521 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] [2021-06-05 16:36:34,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2004 [2021-06-05 16:36:34,796 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-06-05 16:36:34,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:34,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365590840] [2021-06-05 16:36:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:34,994 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-05 16:36:35,117 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-06-05 16:36:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:35,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:35,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365590840] [2021-06-05 16:36:35,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365590840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:35,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328701108] [2021-06-05 16:36:35,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:35,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:36:35,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:35,757 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 16:36:35,806 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_263, v_prenex_259], 5=[A, v_prenex_261]} [2021-06-05 16:36:35,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:35,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:35,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:35,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:35,909 INFO L628 ElimStorePlain]: treesize reduction 150, result has 45.5 percent of original size [2021-06-05 16:36:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:35,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:35,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:35,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:35,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:35,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:35,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2021-06-05 16:36:35,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:35,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:35,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:35,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2021-06-05 16:36:35,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:36,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:36,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:36:36,008 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:314, output treesize:41 [2021-06-05 16:36:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:36,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328701108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:36,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:36,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:36:36,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865816979] [2021-06-05 16:36:36,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:36,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:36,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:36,058 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:38,081 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-06-05 16:36:38,639 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-05 16:36:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:38,790 INFO L93 Difference]: Finished difference Result 2526 states and 8350 transitions. [2021-06-05 16:36:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:36:38,790 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 [2021-06-05 16:36:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:38,794 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 16:36:38,794 INFO L226 Difference]: Without dead ends: 2511 [2021-06-05 16:36:38,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2985.1ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:36:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-05 16:36:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1818. [2021-06-05 16:36:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.4072647220693453) internal successors, (6191), 1817 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6191 transitions. [2021-06-05 16:36:38,816 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6191 transitions. Word has length 26 [2021-06-05 16:36:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:38,816 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 6191 transitions. [2021-06-05 16:36:38,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6191 transitions. [2021-06-05 16:36:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:38,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:38,819 INFO L521 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] [2021-06-05 16:36:39,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:39,019 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:39,019 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-06-05 16:36:39,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:39,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422787186] [2021-06-05 16:36:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:39,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:39,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422787186] [2021-06-05 16:36:39,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422787186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:39,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473460330] [2021-06-05 16:36:39,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:39,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:39,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:36:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,770 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:36:39,770 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 33 [2021-06-05 16:36:39,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,799 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:36:39,799 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 26 [2021-06-05 16:36:39,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,827 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:36:39,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-06-05 16:36:39,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,854 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:36:39,854 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 32 treesize of output 30 [2021-06-05 16:36:39,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,873 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:36:39,874 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 1 [2021-06-05 16:36:39,874 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,902 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:36:39,903 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 32 treesize of output 34 [2021-06-05 16:36:39,906 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,931 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:36:39,931 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 26 [2021-06-05 16:36:39,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,949 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:36:39,949 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 32 treesize of output 1 [2021-06-05 16:36:39,949 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,966 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:36:39,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-05 16:36:39,967 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,991 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:36:39,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 23 [2021-06-05 16:36:39,993 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:40,018 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 25 treesize of output 43 [2021-06-05 16:36:40,027 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:40,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,043 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:36:40,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-05 16:36:40,044 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,061 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:36:40,061 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 1 [2021-06-05 16:36:40,062 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:40,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,077 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:36:40,078 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 1 [2021-06-05 16:36:40,078 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:40,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,096 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:36:40,097 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 [2021-06-05 16:36:40,097 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:40,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:40,107 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:36:40,107 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 [2021-06-05 16:36:40,108 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:40,200 INFO L628 ElimStorePlain]: treesize reduction 76, result has 55.0 percent of original size [2021-06-05 16:36:40,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:36:40,201 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-06-05 16:36:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:40,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473460330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:40,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:40,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 16:36:40,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170141223] [2021-06-05 16:36:40,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:36:40,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:40,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:36:40,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:40,300 INFO L87 Difference]: Start difference. First operand 1818 states and 6191 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:43,054 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-06-05 16:36:43,469 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 16:36:43,920 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-06-05 16:36:44,173 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 16:36:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:44,554 INFO L93 Difference]: Finished difference Result 3017 states and 9720 transitions. [2021-06-05 16:36:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:36:44,554 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 [2021-06-05 16:36:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:44,558 INFO L225 Difference]: With dead ends: 3017 [2021-06-05 16:36:44,558 INFO L226 Difference]: Without dead ends: 2970 [2021-06-05 16:36:44,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 4043.0ms TimeCoverageRelationStatistics Valid=708, Invalid=3452, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:36:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-06-05 16:36:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1841. [2021-06-05 16:36:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.3967391304347827) internal successors, (6250), 1840 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6250 transitions. [2021-06-05 16:36:44,585 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6250 transitions. Word has length 26 [2021-06-05 16:36:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:44,585 INFO L482 AbstractCegarLoop]: Abstraction has 1841 states and 6250 transitions. [2021-06-05 16:36:44,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6250 transitions. [2021-06-05 16:36:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:44,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:44,588 INFO L521 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] [2021-06-05 16:36:44,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-06-05 16:36:44,788 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:44,788 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-06-05 16:36:44,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:44,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572899970] [2021-06-05 16:36:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:45,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:45,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572899970] [2021-06-05 16:36:45,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572899970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:45,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559718794] [2021-06-05 16:36:45,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:45,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:36:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:36:45,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:45,620 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 16:36:45,848 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_273, v_prenex_265, v_prenex_277, v_prenex_267, v_prenex_269], 6=[v_prenex_271, v_prenex_275]} [2021-06-05 16:36:45,931 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:36:45,931 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 33 treesize of output 51 [2021-06-05 16:36:45,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,023 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-06-05 16:36:46,023 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 33 treesize of output 34 [2021-06-05 16:36:46,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:47,096 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 177 DAG size of output: 176 [2021-06-05 16:36:47,097 INFO L628 ElimStorePlain]: treesize reduction 5, result has 99.5 percent of original size [2021-06-05 16:36:47,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:47,144 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-06-05 16:36:47,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:47,206 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:36:47,206 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:36:47,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:48,777 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 183 DAG size of output: 171 [2021-06-05 16:36:48,778 INFO L628 ElimStorePlain]: treesize reduction 45, result has 95.3 percent of original size [2021-06-05 16:36:48,842 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:36:48,842 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 35 treesize of output 55 [2021-06-05 16:36:48,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:48,910 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:36:48,910 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 35 treesize of output 55 [2021-06-05 16:36:48,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:49,985 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 182 DAG size of output: 176 [2021-06-05 16:36:49,986 INFO L628 ElimStorePlain]: treesize reduction 44, result has 95.4 percent of original size [2021-06-05 16:36:50,049 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:36:50,050 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 33 treesize of output 55 [2021-06-05 16:36:50,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:50,104 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:36:50,105 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 28 treesize of output 48 [2021-06-05 16:36:50,114 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:51,130 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 177 DAG size of output: 167 [2021-06-05 16:36:51,131 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.0 percent of original size [2021-06-05 16:36:51,185 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:36:51,185 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 31 treesize of output 47 [2021-06-05 16:36:51,189 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:51,232 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:36:51,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 16:36:51,237 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:51,726 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 16:36:51,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:51,771 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-05 16:36:51,771 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 28 treesize of output 36 [2021-06-05 16:36:51,773 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:51,821 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:36:51,821 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 33 treesize of output 47 [2021-06-05 16:36:51,824 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:52,304 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-05 16:36:52,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:52,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:52,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:52,343 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 23 treesize of output 57 [2021-06-05 16:36:52,359 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:52,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:52,403 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 16:36:52,404 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 30 treesize of output 52 [2021-06-05 16:36:52,411 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:52,885 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 16:36:52,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:52,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:52,936 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 16:36:52,937 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-06-05 16:36:52,948 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:52,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:52,965 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 16:36:52,965 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:36:52,966 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:53,383 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-05 16:36:53,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:53,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-05 16:36:53,426 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:957, output treesize:1656 [2021-06-05 16:36:53,988 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-06-05 16:36:54,285 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 16:36:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559718794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:54,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:54,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:36:54,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58517992] [2021-06-05 16:36:54,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:36:54,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:54,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:36:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:36:54,449 INFO L87 Difference]: Start difference. First operand 1841 states and 6250 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) [2021-06-05 16:36:54,793 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 16:36:55,162 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 41 [2021-06-05 16:36:55,371 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 16:36:55,754 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-06-05 16:36:56,246 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2021-06-05 16:36:56,763 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 16:36:56,925 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 16:36:57,481 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2021-06-05 16:36:57,962 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-06-05 16:36:58,359 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 16:36:58,529 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2021-06-05 16:36:58,842 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2021-06-05 16:36:59,463 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 76 [2021-06-05 16:36:59,752 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2021-06-05 16:36:59,998 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 50 [2021-06-05 16:37:00,783 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2021-06-05 16:37:01,697 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 77 [2021-06-05 16:37:02,032 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 52 [2021-06-05 16:37:02,524 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-06-05 16:37:02,754 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 33 [2021-06-05 16:37:02,967 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 39 [2021-06-05 16:37:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:03,091 INFO L93 Difference]: Finished difference Result 3177 states and 10241 transitions. [2021-06-05 16:37:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:37:03,091 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 [2021-06-05 16:37:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:03,096 INFO L225 Difference]: With dead ends: 3177 [2021-06-05 16:37:03,096 INFO L226 Difference]: Without dead ends: 3132 [2021-06-05 16:37:03,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 9246.1ms TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:37:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-06-05 16:37:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 1888. [2021-06-05 16:37:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 3.3995760466348703) internal successors, (6415), 1887 states have internal predecessors, (6415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 6415 transitions. [2021-06-05 16:37:03,154 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 6415 transitions. Word has length 26 [2021-06-05 16:37:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:03,154 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 6415 transitions. [2021-06-05 16:37:03,154 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) [2021-06-05 16:37:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 6415 transitions. [2021-06-05 16:37:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:03,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:03,156 INFO L521 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] [2021-06-05 16:37:03,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2138 [2021-06-05 16:37:03,361 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:03,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:03,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-06-05 16:37:03,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:03,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73332314] [2021-06-05 16:37:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:03,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:03,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73332314] [2021-06-05 16:37:03,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73332314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:03,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356918032] [2021-06-05 16:37:03,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:03,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:03,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:37:03,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:04,192 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 16:37:04,335 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_287], 6=[v_prenex_285, v_prenex_289]} [2021-06-05 16:37:04,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:04,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:04,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 16:37:04,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:04,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:04,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:37:04,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:04,458 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-05 16:37:04,459 INFO L628 ElimStorePlain]: treesize reduction 154, result has 43.2 percent of original size [2021-06-05 16:37:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,463 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 13 treesize of output 7 [2021-06-05 16:37:04,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:04,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:04,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:04,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:37:04,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:04,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:04,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:04,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:37:04,543 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:04,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:04,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:37:04,572 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:337, output treesize:55 [2021-06-05 16:37:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356918032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:04,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:04,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:37:04,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791985314] [2021-06-05 16:37:04,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:04,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:04,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:04,621 INFO L87 Difference]: Start difference. First operand 1888 states and 6415 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:05,952 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-06-05 16:37:06,146 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-06-05 16:37:06,651 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-06-05 16:37:06,826 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 16:37:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:07,025 INFO L93 Difference]: Finished difference Result 2395 states and 7935 transitions. [2021-06-05 16:37:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:37:07,026 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 [2021-06-05 16:37:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:07,029 INFO L225 Difference]: With dead ends: 2395 [2021-06-05 16:37:07,029 INFO L226 Difference]: Without dead ends: 2380 [2021-06-05 16:37:07,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2555.1ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:37:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-05 16:37:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1886. [2021-06-05 16:37:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-06-05 16:37:07,051 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-06-05 16:37:07,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:07,052 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-06-05 16:37:07,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-06-05 16:37:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:07,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:07,054 INFO L521 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] [2021-06-05 16:37:07,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2263 [2021-06-05 16:37:07,257 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-06-05 16:37:07,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:07,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428451095] [2021-06-05 16:37:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:07,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428451095] [2021-06-05 16:37:07,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428451095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622828002] [2021-06-05 16:37:07,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:07,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:37:07,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:37:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:08,109 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-05 16:37:08,334 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 16:37:08,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,554 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:37:08,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 16:37:08,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:08,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:08,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 16:37:08,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:08,986 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 16:37:08,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,030 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:37:09,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-05 16:37:09,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,063 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:37:09,064 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 28 treesize of output 30 [2021-06-05 16:37:09,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,452 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-05 16:37:09,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,490 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:37:09,490 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 [2021-06-05 16:37:09,492 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,519 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:37:09,519 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 28 [2021-06-05 16:37:09,521 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,907 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-05 16:37:09,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,942 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:37:09,942 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 41 treesize of output 33 [2021-06-05 16:37:09,944 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 16:37:09,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:10,632 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 140 [2021-06-05 16:37:10,633 INFO L628 ElimStorePlain]: treesize reduction 36, result has 94.8 percent of original size [2021-06-05 16:37:10,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:10,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:10,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:10,666 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 47 [2021-06-05 16:37:10,671 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:10,700 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:37:10,701 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 33 [2021-06-05 16:37:10,704 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:11,325 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 129 [2021-06-05 16:37:11,326 INFO L628 ElimStorePlain]: treesize reduction 38, result has 94.0 percent of original size [2021-06-05 16:37:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,357 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:37:11,358 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 32 treesize of output 26 [2021-06-05 16:37:11,359 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,401 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:37:11,401 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 37 treesize of output 35 [2021-06-05 16:37:11,404 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:11,684 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:37:11,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,716 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:37:11,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:37:11,720 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,733 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:11,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:37:11,734 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:11,966 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 16:37:11,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:11,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:11,993 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:37:11,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:37:11,995 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:12,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:12,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:12,018 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:37:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:37:12,022 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:12,428 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2021-06-05 16:37:12,429 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.7 percent of original size [2021-06-05 16:37:12,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 16:37:12,442 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:841, output treesize:391 [2021-06-05 16:37:12,576 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-06-05 16:37:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:12,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622828002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:12,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:12,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 16:37:12,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991525488] [2021-06-05 16:37:12,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:37:12,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:37:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:37:12,637 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 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) [2021-06-05 16:37:12,993 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 16:37:13,253 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 16:37:20,678 WARN L205 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2021-06-05 16:37:27,831 WARN L205 SmtUtils]: Spent 6.85 s on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-06-05 16:37:28,723 WARN L205 SmtUtils]: Spent 839.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 154 [2021-06-05 16:37:28,924 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 16:37:29,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:29,224 INFO L93 Difference]: Finished difference Result 2712 states and 8977 transitions. [2021-06-05 16:37:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:37:29,224 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 [2021-06-05 16:37:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:29,228 INFO L225 Difference]: With dead ends: 2712 [2021-06-05 16:37:29,228 INFO L226 Difference]: Without dead ends: 2682 [2021-06-05 16:37:29,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 16974.7ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:37:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-05 16:37:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1886. [2021-06-05 16:37:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.39946949602122) internal successors, (6408), 1885 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6408 transitions. [2021-06-05 16:37:29,256 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6408 transitions. Word has length 26 [2021-06-05 16:37:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:29,256 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6408 transitions. [2021-06-05 16:37:29,256 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) [2021-06-05 16:37:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6408 transitions. [2021-06-05 16:37:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:29,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:29,259 INFO L521 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] [2021-06-05 16:37:29,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2277 [2021-06-05 16:37:29,481 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 54 times [2021-06-05 16:37:29,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:29,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483890904] [2021-06-05 16:37:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:30,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:30,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483890904] [2021-06-05 16:37:30,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483890904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:30,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038846428] [2021-06-05 16:37:30,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:30,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:37:30,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:30,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:37:30,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:30,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,283 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:37:30,284 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 32 treesize of output 30 [2021-06-05 16:37:30,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,317 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:37:30,318 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 33 [2021-06-05 16:37:30,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,339 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,339 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 [2021-06-05 16:37:30,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,357 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,358 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 32 treesize of output 1 [2021-06-05 16:37:30,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,386 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:37:30,387 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 32 treesize of output 34 [2021-06-05 16:37:30,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:30,417 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 25 treesize of output 43 [2021-06-05 16:37:30,424 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,441 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,442 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 1 [2021-06-05 16:37:30,442 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,459 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,459 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 32 treesize of output 1 [2021-06-05 16:37:30,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,477 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-05 16:37:30,478 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,503 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:37:30,504 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 25 [2021-06-05 16:37:30,505 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,522 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,522 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 1 [2021-06-05 16:37:30,523 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,540 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:37:30,541 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,558 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,558 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 1 [2021-06-05 16:37:30,559 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,576 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:37:30,577 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,593 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-06-05 16:37:30,594 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:30,603 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:30,604 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 1 [2021-06-05 16:37:30,604 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:30,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:37:30,648 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:753, output treesize:93 [2021-06-05 16:37:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:30,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038846428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:30,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:30,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:37:30,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671817343] [2021-06-05 16:37:30,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:37:30,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:30,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:37:30,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:37:30,748 INFO L87 Difference]: Start difference. First operand 1886 states and 6408 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) [2021-06-05 16:37:31,674 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-06-05 16:37:32,232 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-05 16:37:32,907 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-06-05 16:37:33,266 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-05 16:37:33,610 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 16:37:33,834 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-05 16:37:34,008 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 16:37:34,217 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-06-05 16:37:34,604 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 16:37:34,794 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-06-05 16:37:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:35,033 INFO L93 Difference]: Finished difference Result 3398 states and 10882 transitions. [2021-06-05 16:37:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:37:35,033 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 [2021-06-05 16:37:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:35,038 INFO L225 Difference]: With dead ends: 3398 [2021-06-05 16:37:35,038 INFO L226 Difference]: Without dead ends: 3364 [2021-06-05 16:37:35,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4281.5ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:37:35,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-06-05 16:37:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 1892. [2021-06-05 16:37:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.405076679005817) internal successors, (6439), 1891 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6439 transitions. [2021-06-05 16:37:35,068 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6439 transitions. Word has length 26 [2021-06-05 16:37:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:35,068 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6439 transitions. [2021-06-05 16:37:35,068 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) [2021-06-05 16:37:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6439 transitions. [2021-06-05 16:37:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:35,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:35,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:35,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2347 [2021-06-05 16:37:35,273 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 33 times [2021-06-05 16:37:35,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:35,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951057744] [2021-06-05 16:37:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:35,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:35,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951057744] [2021-06-05 16:37:35,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951057744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:35,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134458142] [2021-06-05 16:37:35,689 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 [2021-06-05 16:37:35,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:37:35,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:35,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:37:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:36,200 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 16:37:36,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:36,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:37:36,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,520 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 16:37:36,520 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-06-05 16:37:36,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,526 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 21 treesize of output 13 [2021-06-05 16:37:36,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:36,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:37:36,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:36,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:36,660 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 28 treesize of output 16 [2021-06-05 16:37:36,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:37:36,666 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:36,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:37:36,716 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-06-05 16:37:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:36,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134458142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:36,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:36,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:37:36,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376543255] [2021-06-05 16:37:36,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:37:36,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:36,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:37:36,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:37:36,770 INFO L87 Difference]: Start difference. First operand 1892 states and 6439 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) [2021-06-05 16:37:37,604 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 16:37:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:37,793 INFO L93 Difference]: Finished difference Result 2313 states and 7725 transitions. [2021-06-05 16:37:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:37:37,794 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 [2021-06-05 16:37:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:37,796 INFO L225 Difference]: With dead ends: 2313 [2021-06-05 16:37:37,796 INFO L226 Difference]: Without dead ends: 2298 [2021-06-05 16:37:37,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1525.7ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:37:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-05 16:37:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1884. [2021-06-05 16:37:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.4083908656399364) internal successors, (6418), 1883 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6418 transitions. [2021-06-05 16:37:37,817 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6418 transitions. Word has length 26 [2021-06-05 16:37:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:37,817 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6418 transitions. [2021-06-05 16:37:37,817 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) [2021-06-05 16:37:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6418 transitions. [2021-06-05 16:37:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:37,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:37,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:38,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-06-05 16:37:38,020 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:38,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1200955766, now seen corresponding path program 34 times [2021-06-05 16:37:38,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:38,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652530105] [2021-06-05 16:37:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:38,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652530105] [2021-06-05 16:37:38,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652530105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744303731] [2021-06-05 16:37:38,421 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 [2021-06-05 16:37:38,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:38,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:37:38,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:38,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:37:38,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:37:38,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:37:38,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:37:38,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:38,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:37:38,813 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,819 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:38,820 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:37:38,828 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:38,835 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:37:38,842 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,848 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:38,849 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:37:38,855 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,861 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-05 16:37:38,862 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:37:38,868 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:38,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:38,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:37:38,872 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:38,953 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-05 16:37:38,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:37:38,954 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-05 16:37:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:39,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744303731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:39,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:39,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:37:39,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627588542] [2021-06-05 16:37:39,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:37:39,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:37:39,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:37:39,010 INFO L87 Difference]: Start difference. First operand 1884 states and 6418 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) [2021-06-05 16:37:39,325 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-05 16:37:39,457 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-05 16:37:39,699 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 39 [2021-06-05 16:37:40,235 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 16:37:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:40,485 INFO L93 Difference]: Finished difference Result 2549 states and 8455 transitions. [2021-06-05 16:37:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:37:40,486 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 [2021-06-05 16:37:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:40,490 INFO L225 Difference]: With dead ends: 2549 [2021-06-05 16:37:40,490 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 16:37:40,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1643.3ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:37:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 16:37:40,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1876. [2021-06-05 16:37:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 3.4074666666666666) internal successors, (6389), 1875 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:40,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 6389 transitions. [2021-06-05 16:37:40,520 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 6389 transitions. Word has length 26 [2021-06-05 16:37:40,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:40,520 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 6389 transitions. [2021-06-05 16:37:40,520 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) [2021-06-05 16:37:40,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 6389 transitions. [2021-06-05 16:37:40,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:40,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:40,522 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:40,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:40,723 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:40,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:40,723 INFO L82 PathProgramCache]: Analyzing trace with hash -179287784, now seen corresponding path program 35 times [2021-06-05 16:37:40,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:40,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266088603] [2021-06-05 16:37:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:41,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:41,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266088603] [2021-06-05 16:37:41,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266088603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:41,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467881072] [2021-06-05 16:37:41,054 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 [2021-06-05 16:37:41,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:37:41,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:37:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:41,691 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:37:41,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:37:41,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:41,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:41,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:41,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-06-05 16:37:41,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:41,872 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:37:41,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:41,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:41,897 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:37:41,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:37:41,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:41,919 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:37:41,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:37:41,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,077 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 16:37:42,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:37:42,099 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,119 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:37:42,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:37:42,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,269 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 16:37:42,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,294 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:37:42,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:37:42,298 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:37:42,316 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,464 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 16:37:42,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:37:42,493 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:314 [2021-06-05 16:37:42,724 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 16:37:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:42,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467881072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:42,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:42,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:37:42,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619411251] [2021-06-05 16:37:42,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:37:42,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:37:42,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:37:42,832 INFO L87 Difference]: Start difference. First operand 1876 states and 6389 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) [2021-06-05 16:37:43,609 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 16:37:43,813 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-06-05 16:37:44,142 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 16:37:44,567 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 16:37:44,810 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 16:37:45,105 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 16:37:45,454 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-06-05 16:37:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:45,533 INFO L93 Difference]: Finished difference Result 2284 states and 7582 transitions. [2021-06-05 16:37:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:37:45,533 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 [2021-06-05 16:37:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:45,536 INFO L225 Difference]: With dead ends: 2284 [2021-06-05 16:37:45,536 INFO L226 Difference]: Without dead ends: 2269 [2021-06-05 16:37:45,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2657.1ms TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:37:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-06-05 16:37:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1867. [2021-06-05 16:37:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.404608788853162) internal successors, (6353), 1866 states have internal predecessors, (6353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6353 transitions. [2021-06-05 16:37:45,560 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6353 transitions. Word has length 26 [2021-06-05 16:37:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:45,560 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 6353 transitions. [2021-06-05 16:37:45,560 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) [2021-06-05 16:37:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6353 transitions. [2021-06-05 16:37:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:45,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:45,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:45,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2424,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:45,785 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1269968860, now seen corresponding path program 36 times [2021-06-05 16:37:45,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:45,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387133237] [2021-06-05 16:37:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:46,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:46,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387133237] [2021-06-05 16:37:46,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387133237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:46,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197319922] [2021-06-05 16:37:46,131 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 [2021-06-05 16:37:46,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:37:46,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:37:46,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,397 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:46,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:37:46,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,406 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:46,406 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 28 treesize of output 16 [2021-06-05 16:37:46,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,415 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:46,416 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 33 treesize of output 19 [2021-06-05 16:37:46,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,428 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:46,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17 [2021-06-05 16:37:46,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:46,441 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 33 treesize of output 27 [2021-06-05 16:37:46,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,454 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:46,454 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 17 [2021-06-05 16:37:46,456 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,465 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:46,465 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 33 treesize of output 19 [2021-06-05 16:37:46,466 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:46,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:37:46,479 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,488 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:46,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-06-05 16:37:46,489 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:46,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:37:46,504 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,514 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:46,514 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 [2021-06-05 16:37:46,514 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:46,527 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 33 treesize of output 27 [2021-06-05 16:37:46,529 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,542 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:46,543 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 28 treesize of output 20 [2021-06-05 16:37:46,544 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:46,555 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 28 treesize of output 24 [2021-06-05 16:37:46,559 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,569 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:46,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:37:46,570 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:46,576 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:46,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:37:46,576 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:46,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:46,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:37:46,657 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-05 16:37:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:46,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197319922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:46,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:46,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:37:46,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758623634] [2021-06-05 16:37:46,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:46,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:46,852 INFO L87 Difference]: Start difference. First operand 1867 states and 6353 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) [2021-06-05 16:37:47,427 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-05 16:37:47,594 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 16:37:47,813 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-06-05 16:37:47,998 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-05 16:37:48,159 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-05 16:37:48,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:48,359 INFO L93 Difference]: Finished difference Result 2064 states and 6910 transitions. [2021-06-05 16:37:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:37:48,360 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 [2021-06-05 16:37:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:48,362 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 16:37:48,362 INFO L226 Difference]: Without dead ends: 2049 [2021-06-05 16:37:48,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1725.6ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:37:48,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-05 16:37:48,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1860. [2021-06-05 16:37:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-06-05 16:37:48,389 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-06-05 16:37:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:48,389 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-06-05 16:37:48,389 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) [2021-06-05 16:37:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-06-05 16:37:48,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:48,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:48,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:48,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2491,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:48,593 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:48,593 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 37 times [2021-06-05 16:37:48,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:48,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381010275] [2021-06-05 16:37:48,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:48,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381010275] [2021-06-05 16:37:48,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381010275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039199937] [2021-06-05 16:37:48,959 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:48,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:37:48,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:37:49,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:49,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:37:49,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:37:49,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:37:49,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:49,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:37:49,421 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:37:49,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:37:49,433 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:49,439 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,444 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 26 treesize of output 13 [2021-06-05 16:37:49,445 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:37:49,450 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,455 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 28 treesize of output 16 [2021-06-05 16:37:49,456 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:37:49,462 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:49,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:49,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:49,466 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:49,548 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-05 16:37:49,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:37:49,550 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-05 16:37:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:49,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039199937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:49,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:49,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:37:49,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463805471] [2021-06-05 16:37:49,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:37:49,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:37:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:37:49,605 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 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) [2021-06-05 16:37:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:50,352 INFO L93 Difference]: Finished difference Result 2341 states and 7786 transitions. [2021-06-05 16:37:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:37:50,353 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 [2021-06-05 16:37:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:50,356 INFO L225 Difference]: With dead ends: 2341 [2021-06-05 16:37:50,356 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 16:37:50,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1012.8ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:37:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 16:37:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1860. [2021-06-05 16:37:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 3.4023668639053253) internal successors, (6325), 1859 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 6325 transitions. [2021-06-05 16:37:50,378 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 6325 transitions. Word has length 26 [2021-06-05 16:37:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:50,378 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 6325 transitions. [2021-06-05 16:37:50,378 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) [2021-06-05 16:37:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 6325 transitions. [2021-06-05 16:37:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:50,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:50,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:50,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2508 [2021-06-05 16:37:50,581 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 38 times [2021-06-05 16:37:50,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:50,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808299921] [2021-06-05 16:37:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:50,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808299921] [2021-06-05 16:37:50,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808299921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:50,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860042227] [2021-06-05 16:37:50,946 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:50,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:50,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:37:50,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:51,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:51,302 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 33 treesize of output 19 [2021-06-05 16:37:51,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,316 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:51,317 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 16 [2021-06-05 16:37:51,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,330 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:51,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:37:51,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,343 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:51,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:37:51,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,355 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:51,355 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 [2021-06-05 16:37:51,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,364 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:51,365 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 28 treesize of output 16 [2021-06-05 16:37:51,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:51,376 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 24 [2021-06-05 16:37:51,377 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:51,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:37:51,392 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,401 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:51,401 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 [2021-06-05 16:37:51,402 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:51,414 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 33 treesize of output 27 [2021-06-05 16:37:51,415 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:51,426 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 33 treesize of output 27 [2021-06-05 16:37:51,429 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:51,440 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 16 treesize of output 18 [2021-06-05 16:37:51,443 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,454 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:51,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17 [2021-06-05 16:37:51,456 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,467 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:51,467 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 17 [2021-06-05 16:37:51,469 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,480 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:51,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:37:51,481 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:51,487 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:51,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:51,488 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:51,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:51,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:37:51,583 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-06-05 16:37:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:51,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860042227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:51,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:51,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:37:51,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765990760] [2021-06-05 16:37:51,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:51,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:51,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:51,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:51,778 INFO L87 Difference]: Start difference. First operand 1860 states and 6325 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) [2021-06-05 16:37:52,413 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 16:37:53,018 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-06-05 16:37:53,231 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 16:37:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:53,294 INFO L93 Difference]: Finished difference Result 2236 states and 7452 transitions. [2021-06-05 16:37:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:37:53,294 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 [2021-06-05 16:37:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:53,297 INFO L225 Difference]: With dead ends: 2236 [2021-06-05 16:37:53,297 INFO L226 Difference]: Without dead ends: 2207 [2021-06-05 16:37:53,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1701.8ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:37:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-05 16:37:53,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1840. [2021-06-05 16:37:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.3953235454051116) internal successors, (6244), 1839 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:53,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6244 transitions. [2021-06-05 16:37:53,318 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6244 transitions. Word has length 26 [2021-06-05 16:37:53,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:53,318 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6244 transitions. [2021-06-05 16:37:53,318 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) [2021-06-05 16:37:53,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6244 transitions. [2021-06-05 16:37:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:53,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:53,320 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:53,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2542 [2021-06-05 16:37:53,521 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 39 times [2021-06-05 16:37:53,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:53,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227589939] [2021-06-05 16:37:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:53,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:53,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227589939] [2021-06-05 16:37:53,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227589939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:53,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347831142] [2021-06-05 16:37:53,826 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:53,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:37:53,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:53,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:37:53,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:54,361 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:37:54,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:37:54,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:54,388 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:37:54,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:37:54,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:54,553 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 16:37:54,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:54,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:54,575 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:37:54,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:54,600 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:37:54,600 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:37:54,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:54,915 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-05 16:37:54,916 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.1 percent of original size [2021-06-05 16:37:54,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:54,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:54,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:37:54,939 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:54,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:54,956 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:37:54,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:37:54,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:55,099 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:37:55,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:55,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:55,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:37:55,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:55,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:55,143 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:37:55,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:37:55,144 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:55,398 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 16:37:55,398 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-06-05 16:37:55,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:37:55,414 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:259 [2021-06-05 16:37:55,610 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-06-05 16:37:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:55,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347831142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:55,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:55,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:37:55,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142175090] [2021-06-05 16:37:55,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:55,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:55,711 INFO L87 Difference]: Start difference. First operand 1840 states and 6244 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) [2021-06-05 16:37:56,423 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-05 16:37:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:56,644 INFO L93 Difference]: Finished difference Result 2047 states and 6843 transitions. [2021-06-05 16:37:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:37:56,644 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 [2021-06-05 16:37:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:56,647 INFO L225 Difference]: With dead ends: 2047 [2021-06-05 16:37:56,647 INFO L226 Difference]: Without dead ends: 2022 [2021-06-05 16:37:56,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1355.9ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:37:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-06-05 16:37:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1822. [2021-06-05 16:37:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.399231191652938) internal successors, (6190), 1821 states have internal predecessors, (6190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 6190 transitions. [2021-06-05 16:37:56,667 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 6190 transitions. Word has length 26 [2021-06-05 16:37:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:56,668 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 6190 transitions. [2021-06-05 16:37:56,668 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) [2021-06-05 16:37:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 6190 transitions. [2021-06-05 16:37:56,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:56,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:56,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:56,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:56,873 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash 827344434, now seen corresponding path program 40 times [2021-06-05 16:37:56,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:56,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178946804] [2021-06-05 16:37:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:57,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178946804] [2021-06-05 16:37:57,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178946804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659094610] [2021-06-05 16:37:57,275 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:57,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:57,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:37:57,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:57,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:37:57,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:57,569 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 42 treesize of output 27 [2021-06-05 16:37:57,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,583 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:57,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-05 16:37:57,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,600 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:57,600 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 17 [2021-06-05 16:37:57,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:57,618 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 24 [2021-06-05 16:37:57,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,631 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:57,631 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 [2021-06-05 16:37:57,632 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,643 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:57,644 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 30 treesize of output 16 [2021-06-05 16:37:57,644 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:57,659 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 23 treesize of output 18 [2021-06-05 16:37:57,663 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,677 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:57,677 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 [2021-06-05 16:37:57,678 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:57,693 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 24 [2021-06-05 16:37:57,697 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,710 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:57,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:37:57,710 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,723 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:57,723 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 [2021-06-05 16:37:57,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,738 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:57,738 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 17 [2021-06-05 16:37:57,740 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:57,751 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 30 treesize of output 16 [2021-06-05 16:37:57,752 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:57,765 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 42 treesize of output 27 [2021-06-05 16:37:57,766 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:57,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:57,776 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:57,776 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 20 [2021-06-05 16:37:57,777 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:57,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:57,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:37:57,856 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-06-05 16:37:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:58,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659094610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:58,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:58,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:37:58,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005079475] [2021-06-05 16:37:58,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:58,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:58,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:58,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:58,057 INFO L87 Difference]: Start difference. First operand 1822 states and 6190 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) [2021-06-05 16:37:58,701 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 16:37:59,336 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 16:37:59,492 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-05 16:37:59,779 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-05 16:38:00,112 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 16:38:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:00,191 INFO L93 Difference]: Finished difference Result 2419 states and 8019 transitions. [2021-06-05 16:38:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:38:00,191 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 [2021-06-05 16:38:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:00,195 INFO L225 Difference]: With dead ends: 2419 [2021-06-05 16:38:00,195 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 16:38:00,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2303.9ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:38:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 16:38:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1803. [2021-06-05 16:38:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.3990011098779136) internal successors, (6125), 1802 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 6125 transitions. [2021-06-05 16:38:00,220 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 6125 transitions. Word has length 26 [2021-06-05 16:38:00,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:00,220 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 6125 transitions. [2021-06-05 16:38:00,220 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) [2021-06-05 16:38:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 6125 transitions. [2021-06-05 16:38:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:00,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:00,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:00,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2637,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:00,423 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:00,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:00,423 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 41 times [2021-06-05 16:38:00,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:00,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414528592] [2021-06-05 16:38:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:00,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414528592] [2021-06-05 16:38:00,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414528592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:00,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052471659] [2021-06-05 16:38:00,788 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:00,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:38:00,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:38:00,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:01,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:38:01,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,260 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 28 treesize of output 16 [2021-06-05 16:38:01,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:38:01,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:38:01,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-06-05 16:38:01,283 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:38:01,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:38:01,298 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,304 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2021-06-05 16:38:01,305 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:38:01,312 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:38:01,320 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 [2021-06-05 16:38:01,328 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:38:01,335 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,342 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:38:01,343 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:38:01,355 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:01,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:01,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:38:01,361 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:01,461 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-06-05 16:38:01,461 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-06-05 16:38:01,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:38:01,463 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-06-05 16:38:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:01,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052471659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:01,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:01,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:38:01,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819248388] [2021-06-05 16:38:01,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:38:01,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:01,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:38:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:38:01,519 INFO L87 Difference]: Start difference. First operand 1803 states and 6125 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) [2021-06-05 16:38:02,095 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 16:38:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:02,425 INFO L93 Difference]: Finished difference Result 2310 states and 7688 transitions. [2021-06-05 16:38:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:38:02,426 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 [2021-06-05 16:38:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:02,429 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 16:38:02,429 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 16:38:02,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1181.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:38:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 16:38:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1848. [2021-06-05 16:38:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-06-05 16:38:02,451 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-06-05 16:38:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:02,451 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-06-05 16:38:02,451 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) [2021-06-05 16:38:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-06-05 16:38:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:02,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:02,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:02,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-06-05 16:38:02,654 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash 137480694, now seen corresponding path program 42 times [2021-06-05 16:38:02,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:02,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359809494] [2021-06-05 16:38:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:02,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:02,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359809494] [2021-06-05 16:38:02,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359809494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:02,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963463156] [2021-06-05 16:38:02,963 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:02,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:38:02,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:38:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:03,268 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:38:03,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:38:03,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,289 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:38:03,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:38:03,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,300 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:38:03,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:38:03,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,327 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:38:03,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:38:03,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,354 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:38:03,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:38:03,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,370 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:38:03,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:38:03,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:03,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-06-05 16:38:03,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,420 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:38:03,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:38:03,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:03,443 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:38:03,444 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,467 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:38:03,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:38:03,469 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,479 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:38:03,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:38:03,480 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,503 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:38:03,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:38:03,508 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,518 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:38:03,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 [2021-06-05 16:38:03,519 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,529 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:38:03,529 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:38:03,530 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,540 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:38:03,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:38:03,541 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:03,554 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 33 treesize of output 35 [2021-06-05 16:38:03,556 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:03,679 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:38:03,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:03,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:38:03,692 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:769, output treesize:357 [2021-06-05 16:38:03,931 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-05 16:38:04,171 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 16:38:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:04,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963463156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:04,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:04,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:38:04,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596443905] [2021-06-05 16:38:04,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:38:04,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:04,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:38:04,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:38:04,291 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 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) [2021-06-05 16:38:04,767 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-05 16:38:05,147 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 16:38:05,331 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-06-05 16:38:05,537 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 16:38:05,709 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-05 16:38:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:05,782 INFO L93 Difference]: Finished difference Result 2570 states and 8519 transitions. [2021-06-05 16:38:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:38:05,783 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 [2021-06-05 16:38:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:05,786 INFO L225 Difference]: With dead ends: 2570 [2021-06-05 16:38:05,786 INFO L226 Difference]: Without dead ends: 2555 [2021-06-05 16:38:05,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2057.2ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:38:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-06-05 16:38:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1848. [2021-06-05 16:38:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 3.394152680021657) internal successors, (6269), 1847 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 6269 transitions. [2021-06-05 16:38:05,810 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 6269 transitions. Word has length 26 [2021-06-05 16:38:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:05,811 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 6269 transitions. [2021-06-05 16:38:05,811 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) [2021-06-05 16:38:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 6269 transitions. [2021-06-05 16:38:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:05,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:05,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:06,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2690 [2021-06-05 16:38:06,016 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:06,016 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 43 times [2021-06-05 16:38:06,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:06,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572691435] [2021-06-05 16:38:06,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:06,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:06,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572691435] [2021-06-05 16:38:06,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572691435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:06,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130929382] [2021-06-05 16:38:06,290 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:38:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:06,631 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_327, v_prenex_329], 3=[A, v_prenex_331]} [2021-06-05 16:38:06,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:06,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:06,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:06,640 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:38:06,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:06,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:06,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:06,647 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:38:06,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:06,803 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 16:38:06,804 INFO L628 ElimStorePlain]: treesize reduction 129, result has 54.9 percent of original size [2021-06-05 16:38:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:06,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:06,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:06,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:38:06,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:06,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:06,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:06,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:38:06,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:06,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:06,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:06,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:38:06,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:06,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:06,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:06,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:06,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:38:06,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:06,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:06,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:38:06,966 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:325, output treesize:51 [2021-06-05 16:38:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:07,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130929382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:07,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:07,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:38:07,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169571459] [2021-06-05 16:38:07,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:38:07,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:38:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:38:07,031 INFO L87 Difference]: Start difference. First operand 1848 states and 6269 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) [2021-06-05 16:38:07,790 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 16:38:07,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:07,930 INFO L93 Difference]: Finished difference Result 2415 states and 7997 transitions. [2021-06-05 16:38:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:38:07,931 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 [2021-06-05 16:38:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:07,934 INFO L225 Difference]: With dead ends: 2415 [2021-06-05 16:38:07,934 INFO L226 Difference]: Without dead ends: 2385 [2021-06-05 16:38:07,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1088.7ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:38:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-05 16:38:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1850. [2021-06-05 16:38:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1849 states have (on average 3.3958896700919414) internal successors, (6279), 1849 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 6279 transitions. [2021-06-05 16:38:07,957 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 6279 transitions. Word has length 26 [2021-06-05 16:38:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:07,957 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 6279 transitions. [2021-06-05 16:38:07,957 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) [2021-06-05 16:38:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 6279 transitions. [2021-06-05 16:38:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:07,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:07,959 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:08,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-06-05 16:38:08,159 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:08,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 44 times [2021-06-05 16:38:08,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:08,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992233737] [2021-06-05 16:38:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:08,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:08,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992233737] [2021-06-05 16:38:08,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992233737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:08,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435074016] [2021-06-05 16:38:08,529 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:08,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:08,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:08,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:38:08,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:08,777 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-05 16:38:08,931 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 16:38:09,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:09,169 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:38:09,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:38:09,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:09,195 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:38:09,195 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:38:09,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:09,367 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:38:09,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:09,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:09,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:09,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-06-05 16:38:09,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:09,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:09,412 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:38:09,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:38:09,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:09,577 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:38:09,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:09,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:09,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:09,598 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 33 treesize of output 35 [2021-06-05 16:38:09,602 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:09,623 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:38:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:38:09,624 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:09,931 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-06-05 16:38:09,931 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-06-05 16:38:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:09,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:09,950 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:38:09,956 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:09,973 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:38:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:38:09,975 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:10,244 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 16:38:10,245 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.7 percent of original size [2021-06-05 16:38:10,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:38:10,263 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:256 [2021-06-05 16:38:10,480 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 16:38:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:10,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435074016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:10,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:10,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 16:38:10,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905943597] [2021-06-05 16:38:10,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:10,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:10,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:10,581 INFO L87 Difference]: Start difference. First operand 1850 states and 6279 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:10,834 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2021-06-05 16:38:11,072 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 16:38:11,599 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 16:38:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:11,627 INFO L93 Difference]: Finished difference Result 2425 states and 8078 transitions. [2021-06-05 16:38:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:38:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:38:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:11,631 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 16:38:11,631 INFO L226 Difference]: Without dead ends: 2410 [2021-06-05 16:38:11,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1699.0ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:38:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-05 16:38:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1868. [2021-06-05 16:38:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.392072844134976) internal successors, (6333), 1867 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6333 transitions. [2021-06-05 16:38:11,658 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6333 transitions. Word has length 26 [2021-06-05 16:38:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:11,658 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6333 transitions. [2021-06-05 16:38:11,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6333 transitions. [2021-06-05 16:38:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:11,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:11,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:11,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2752,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:11,861 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 45 times [2021-06-05 16:38:11,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:11,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305755288] [2021-06-05 16:38:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:12,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:12,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305755288] [2021-06-05 16:38:12,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305755288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:12,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529850616] [2021-06-05 16:38:12,254 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:12,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:38:12,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:12,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:38:12,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:12,709 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 16:38:12,967 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-06-05 16:38:13,045 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_349, v_prenex_347], 2=[A, v_prenex_348]} [2021-06-05 16:38:13,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:13,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:38:13,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:13,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:13,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:38:13,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:13,205 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-06-05 16:38:13,205 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-06-05 16:38:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:13,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:38:13,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:13,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:13,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:13,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:13,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:13,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:38:13,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:13,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:13,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:38:13,276 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:13,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:13,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:13,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:13,325 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 28 treesize of output 16 [2021-06-05 16:38:13,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:13,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:13,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:38:13,368 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:285, output treesize:51 [2021-06-05 16:38:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:13,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529850616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:13,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:13,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:38:13,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294759168] [2021-06-05 16:38:13,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:13,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:13,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:13,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:13,428 INFO L87 Difference]: Start difference. First operand 1868 states and 6333 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:14,292 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:38:14,544 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2021-06-05 16:38:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:14,652 INFO L93 Difference]: Finished difference Result 2321 states and 7745 transitions. [2021-06-05 16:38:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:38:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:38:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:14,656 INFO L225 Difference]: With dead ends: 2321 [2021-06-05 16:38:14,656 INFO L226 Difference]: Without dead ends: 2306 [2021-06-05 16:38:14,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1886.4ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:38:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-05 16:38:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1889. [2021-06-05 16:38:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 3.3887711864406778) internal successors, (6398), 1888 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:14,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 6398 transitions. [2021-06-05 16:38:14,680 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 6398 transitions. Word has length 26 [2021-06-05 16:38:14,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:14,680 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 6398 transitions. [2021-06-05 16:38:14,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 6398 transitions. [2021-06-05 16:38:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:14,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:14,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:14,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-06-05 16:38:14,883 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:14,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:14,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1962618678, now seen corresponding path program 46 times [2021-06-05 16:38:14,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:14,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644784862] [2021-06-05 16:38:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:15,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:15,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644784862] [2021-06-05 16:38:15,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644784862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:15,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006131435] [2021-06-05 16:38:15,225 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:15,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:15,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:15,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:38:15,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:15,665 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 16:38:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:15,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:15,727 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 28 treesize of output 24 [2021-06-05 16:38:15,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:15,849 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:38:15,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:15,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:15,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:15,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:38:15,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:15,980 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 16:38:15,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:15,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:15,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:15,994 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 17 [2021-06-05 16:38:15,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:16,110 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:38:16,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:16,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,123 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 33 treesize of output 27 [2021-06-05 16:38:16,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:16,239 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:38:16,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:16,252 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:16,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:38:16,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:16,364 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:38:16,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:16,376 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:16,376 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 17 [2021-06-05 16:38:16,377 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:16,482 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:38:16,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:16,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:38:16,497 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:16,597 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:38:16,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:16,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,608 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 16 treesize of output 18 [2021-06-05 16:38:16,611 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:16,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:16,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:38:16,712 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-05 16:38:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:16,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006131435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:16,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:16,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:38:16,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925750282] [2021-06-05 16:38:16,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:16,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:16,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:16,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:16,912 INFO L87 Difference]: Start difference. First operand 1889 states and 6398 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:17,689 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 16:38:18,065 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-05 16:38:18,400 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:38:18,520 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-05 16:38:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:18,607 INFO L93 Difference]: Finished difference Result 2617 states and 8667 transitions. [2021-06-05 16:38:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:38:18,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:38:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:18,612 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 16:38:18,612 INFO L226 Difference]: Without dead ends: 2602 [2021-06-05 16:38:18,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2120.3ms TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:38:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-06-05 16:38:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 1886. [2021-06-05 16:38:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.389920424403183) internal successors, (6390), 1885 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6390 transitions. [2021-06-05 16:38:18,637 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6390 transitions. Word has length 26 [2021-06-05 16:38:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:18,637 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6390 transitions. [2021-06-05 16:38:18,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6390 transitions. [2021-06-05 16:38:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:18,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:18,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:18,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2825,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:18,841 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-06-05 16:38:18,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:18,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347107370] [2021-06-05 16:38:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:19,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:19,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347107370] [2021-06-05 16:38:19,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347107370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:19,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489574003] [2021-06-05 16:38:19,173 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:19,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:38:19,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:19,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:38:19,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:19,597 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:38:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:19,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:19,716 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 16 treesize of output 18 [2021-06-05 16:38:19,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:19,731 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:19,731 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 17 [2021-06-05 16:38:19,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:19,869 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:38:19,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:19,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:19,883 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 26 treesize of output 24 [2021-06-05 16:38:19,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:19,896 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 17 [2021-06-05 16:38:19,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:20,027 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 16:38:20,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:20,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:20,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:20,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:38:20,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:20,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:20,056 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:20,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:38:20,057 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:20,172 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 16:38:20,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:20,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:20,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:20,186 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 33 treesize of output 27 [2021-06-05 16:38:20,187 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:20,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:20,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:38:20,200 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:20,306 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 16:38:20,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:20,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:38:20,313 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:325, output treesize:174 [2021-06-05 16:38:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:20,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489574003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:20,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:20,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:38:20,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934847012] [2021-06-05 16:38:20,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:38:20,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:20,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:38:20,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:38:20,526 INFO L87 Difference]: Start difference. First operand 1886 states and 6390 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) [2021-06-05 16:38:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:21,579 INFO L93 Difference]: Finished difference Result 2461 states and 8175 transitions. [2021-06-05 16:38:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:38:21,579 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 [2021-06-05 16:38:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:21,583 INFO L225 Difference]: With dead ends: 2461 [2021-06-05 16:38:21,583 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 16:38:21,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1436.3ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:38:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 16:38:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1886. [2021-06-05 16:38:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-06-05 16:38:21,606 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-06-05 16:38:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:21,606 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-06-05 16:38:21,606 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) [2021-06-05 16:38:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-06-05 16:38:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:21,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:21,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:21,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-06-05 16:38:21,809 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:21,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-06-05 16:38:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:21,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680438985] [2021-06-05 16:38:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:22,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:22,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680438985] [2021-06-05 16:38:22,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680438985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:22,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128259641] [2021-06-05 16:38:22,177 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:22,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:38:22,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:22,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:38:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,410 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:38:22,410 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 28 treesize of output 16 [2021-06-05 16:38:22,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,419 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:38:22,419 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 28 treesize of output 16 [2021-06-05 16:38:22,420 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,428 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:38:22,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:38:22,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,440 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:22,440 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 17 [2021-06-05 16:38:22,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:22,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:38:22,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,465 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:22,465 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 17 [2021-06-05 16:38:22,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,476 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:38:22,476 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 33 treesize of output 19 [2021-06-05 16:38:22,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:22,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 24 [2021-06-05 16:38:22,489 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,498 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:38:22,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-06-05 16:38:22,498 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:22,509 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 16 treesize of output 18 [2021-06-05 16:38:22,513 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,522 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:38:22,522 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 [2021-06-05 16:38:22,523 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:22,534 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 33 treesize of output 27 [2021-06-05 16:38:22,537 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:38:22,550 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:22,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:38:22,564 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,572 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:38:22,572 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 [2021-06-05 16:38:22,573 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:22,579 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:38:22,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:38:22,579 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:22,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:22,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:38:22,657 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-05 16:38:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:22,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128259641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:22,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:22,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:38:22,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172471477] [2021-06-05 16:38:22,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:38:22,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:38:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:38:22,868 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 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) [2021-06-05 16:38:23,628 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 16:38:23,831 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-06-05 16:38:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:23,907 INFO L93 Difference]: Finished difference Result 2412 states and 8043 transitions. [2021-06-05 16:38:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:38:23,907 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 [2021-06-05 16:38:23,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:23,911 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:38:23,911 INFO L226 Difference]: Without dead ends: 2397 [2021-06-05 16:38:23,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1380.8ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:38:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-06-05 16:38:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 1886. [2021-06-05 16:38:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.3920424403183023) internal successors, (6394), 1885 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6394 transitions. [2021-06-05 16:38:23,936 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6394 transitions. Word has length 26 [2021-06-05 16:38:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:23,936 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 6394 transitions. [2021-06-05 16:38:23,936 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) [2021-06-05 16:38:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6394 transitions. [2021-06-05 16:38:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:23,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:23,938 INFO L521 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] [2021-06-05 16:38:24,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:24,139 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-06-05 16:38:24,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:24,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860697118] [2021-06-05 16:38:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:24,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860697118] [2021-06-05 16:38:24,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860697118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050860860] [2021-06-05 16:38:24,575 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:38:24,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,051 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 13 [2021-06-05 16:38:25,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,059 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 37 treesize of output 19 [2021-06-05 16:38:25,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,067 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 35 treesize of output 19 [2021-06-05 16:38:25,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:38:25,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,082 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 16 [2021-06-05 16:38:25,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,090 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 16 [2021-06-05 16:38:25,091 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:38:25,099 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:38:25,107 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,114 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 30 treesize of output 16 [2021-06-05 16:38:25,115 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,122 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 13 [2021-06-05 16:38:25,123 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,130 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 39 treesize of output 19 [2021-06-05 16:38:25,131 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:38:25,139 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,146 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 16 [2021-06-05 16:38:25,146 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,153 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 30 treesize of output 16 [2021-06-05 16:38:25,154 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:25,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:25,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16 [2021-06-05 16:38:25,158 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:25,185 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-05 16:38:25,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:38:25,186 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-05 16:38:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:25,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050860860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:25,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:25,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:38:25,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468072916] [2021-06-05 16:38:25,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:25,217 INFO L87 Difference]: Start difference. First operand 1886 states and 6394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:25,985 INFO L93 Difference]: Finished difference Result 2181 states and 7107 transitions. [2021-06-05 16:38:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:38:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:38:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:25,989 INFO L225 Difference]: With dead ends: 2181 [2021-06-05 16:38:25,989 INFO L226 Difference]: Without dead ends: 2144 [2021-06-05 16:38:25,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1039.7ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:38:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-05 16:38:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1906. [2021-06-05 16:38:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.391076115485564) internal successors, (6460), 1905 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6460 transitions. [2021-06-05 16:38:26,011 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6460 transitions. Word has length 26 [2021-06-05 16:38:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:26,011 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6460 transitions. [2021-06-05 16:38:26,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6460 transitions. [2021-06-05 16:38:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:26,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:26,013 INFO L521 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] [2021-06-05 16:38:26,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-06-05 16:38:26,214 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-06-05 16:38:26,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:26,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025925013] [2021-06-05 16:38:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:26,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025925013] [2021-06-05 16:38:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025925013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679381500] [2021-06-05 16:38:26,564 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:26,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:26,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:38:26,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:26,857 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 16:38:26,907 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_376, v_prenex_378], 6=[A, v_prenex_374]} [2021-06-05 16:38:26,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:26,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:26,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:26,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-06-05 16:38:26,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:26,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:26,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:26,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:26,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2021-06-05 16:38:26,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:27,032 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 16:38:27,032 INFO L628 ElimStorePlain]: treesize reduction 156, result has 44.9 percent of original size [2021-06-05 16:38:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:27,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:38:27,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:27,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:27,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:27,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:27,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:38:27,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:27,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:27,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:27,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:27,120 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:38:27,121 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:27,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:27,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:38:27,152 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:341, output treesize:41 [2021-06-05 16:38:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:27,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679381500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:27,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:27,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:38:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661321766] [2021-06-05 16:38:27,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:27,203 INFO L87 Difference]: Start difference. First operand 1906 states and 6460 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:28,150 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 16:38:28,302 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 16:38:28,465 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-05 16:38:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:28,581 INFO L93 Difference]: Finished difference Result 2358 states and 7788 transitions. [2021-06-05 16:38:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:38:28,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:38:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:28,584 INFO L225 Difference]: With dead ends: 2358 [2021-06-05 16:38:28,584 INFO L226 Difference]: Without dead ends: 2312 [2021-06-05 16:38:28,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1608.2ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:38:28,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-06-05 16:38:28,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1906. [2021-06-05 16:38:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.3858267716535435) internal successors, (6450), 1905 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6450 transitions. [2021-06-05 16:38:28,608 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6450 transitions. Word has length 26 [2021-06-05 16:38:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:28,608 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 6450 transitions. [2021-06-05 16:38:28,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6450 transitions. [2021-06-05 16:38:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:28,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:28,610 INFO L521 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] [2021-06-05 16:38:28,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2988 [2021-06-05 16:38:28,811 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:28,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-06-05 16:38:28,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:28,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720280241] [2021-06-05 16:38:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:29,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:29,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720280241] [2021-06-05 16:38:29,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720280241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:29,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124916205] [2021-06-05 16:38:29,168 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:29,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:38:29,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:38:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:29,624 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:38:29,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:29,936 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:38:29,936 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 28 [2021-06-05 16:38:29,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:29,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:29,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:29,969 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:38:29,969 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 [2021-06-05 16:38:29,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:30,379 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-06-05 16:38:30,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:30,420 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:38:30,420 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 [2021-06-05 16:38:30,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:30,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:30,452 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:38:30,452 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 25 [2021-06-05 16:38:30,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:30,828 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:38:30,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:30,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:30,866 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:38:30,867 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 28 treesize of output 30 [2021-06-05 16:38:30,870 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:30,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:30,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:30,910 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:38:30,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-05 16:38:30,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:31,256 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:38:31,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:31,289 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:38:31,289 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 28 treesize of output 26 [2021-06-05 16:38:31,291 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:31,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:31,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:31,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 16:38:31,323 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:31,676 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:38:31,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:31,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:31,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:31,713 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:38:31,713 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 [2021-06-05 16:38:31,714 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:31,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:31,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:31,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:31,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 16:38:31,748 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:32,328 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2021-06-05 16:38:32,329 INFO L628 ElimStorePlain]: treesize reduction 33, result has 94.4 percent of original size [2021-06-05 16:38:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,360 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:38:32,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:38:32,364 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,377 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:38:32,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:38:32,378 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:32,627 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 16:38:32,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,660 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:38:32,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 16:38:32,663 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:32,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,685 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:38:32,686 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 32 treesize of output 28 [2021-06-05 16:38:32,687 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:32,923 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:38:32,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,956 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:38:32,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:38:32,960 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:32,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:32,974 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:38:32,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:38:32,974 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:33,165 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:38:33,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:33,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 16:38:33,177 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:340 [2021-06-05 16:38:33,305 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2021-06-05 16:38:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:33,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124916205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:33,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:33,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:38:33,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924666063] [2021-06-05 16:38:33,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:38:33,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:38:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:38:33,362 INFO L87 Difference]: Start difference. First operand 1906 states and 6450 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:34,517 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:38:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:34,835 INFO L93 Difference]: Finished difference Result 2168 states and 7234 transitions. [2021-06-05 16:38:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:38:34,835 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 [2021-06-05 16:38:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:34,838 INFO L225 Difference]: With dead ends: 2168 [2021-06-05 16:38:34,838 INFO L226 Difference]: Without dead ends: 2153 [2021-06-05 16:38:34,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1751.7ms TimeCoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:38:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-06-05 16:38:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 1921. [2021-06-05 16:38:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.3921875) internal successors, (6513), 1920 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6513 transitions. [2021-06-05 16:38:34,860 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6513 transitions. Word has length 26 [2021-06-05 16:38:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:34,860 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6513 transitions. [2021-06-05 16:38:34,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6513 transitions. [2021-06-05 16:38:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:34,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:34,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:35,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:35,062 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:35,063 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-06-05 16:38:35,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:35,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081879514] [2021-06-05 16:38:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:35,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:35,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081879514] [2021-06-05 16:38:35,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081879514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:35,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63876953] [2021-06-05 16:38:35,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:38:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:35,844 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-05 16:38:36,030 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:38:36,524 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-06-05 16:38:36,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:36,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:36,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:38:36,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:36,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:36,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:38:36,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:36,717 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 16:38:36,718 INFO L628 ElimStorePlain]: treesize reduction 44, result has 75.1 percent of original size [2021-06-05 16:38:36,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:36,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:38:36,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:36,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:36,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:36,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:36,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:36,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 28 treesize of output 16 [2021-06-05 16:38:36,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:36,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:36,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:36,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:38:36,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:36,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:36,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:38:36,856 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-06-05 16:38:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:36,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63876953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:36,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:36,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:38:36,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824575270] [2021-06-05 16:38:36,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:38:36,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:36,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:38:36,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:38:36,917 INFO L87 Difference]: Start difference. First operand 1921 states and 6513 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) [2021-06-05 16:38:37,459 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 16:38:37,620 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 16:38:38,304 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 73 [2021-06-05 16:38:38,773 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-06-05 16:38:39,326 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-06-05 16:38:39,819 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 92 [2021-06-05 16:38:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:40,040 INFO L93 Difference]: Finished difference Result 2468 states and 8139 transitions. [2021-06-05 16:38:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:38:40,040 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 [2021-06-05 16:38:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:40,043 INFO L225 Difference]: With dead ends: 2468 [2021-06-05 16:38:40,043 INFO L226 Difference]: Without dead ends: 2453 [2021-06-05 16:38:40,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3805.8ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:38:40,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-05 16:38:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1932. [2021-06-05 16:38:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.392542723977214) internal successors, (6551), 1931 states have internal predecessors, (6551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6551 transitions. [2021-06-05 16:38:40,065 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6551 transitions. Word has length 26 [2021-06-05 16:38:40,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:40,065 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 6551 transitions. [2021-06-05 16:38:40,066 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) [2021-06-05 16:38:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6551 transitions. [2021-06-05 16:38:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:40,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:40,068 INFO L521 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] [2021-06-05 16:38:40,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 16:38:40,268 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-06-05 16:38:40,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:40,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693127492] [2021-06-05 16:38:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:40,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693127492] [2021-06-05 16:38:40,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693127492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:40,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499735868] [2021-06-05 16:38:40,559 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:40,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:40,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:38:40,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:41,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,154 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 16 [2021-06-05 16:38:41,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 13 [2021-06-05 16:38:41,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,171 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 33 treesize of output 13 [2021-06-05 16:38:41,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,181 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 19 [2021-06-05 16:38:41,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,190 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 30 treesize of output 16 [2021-06-05 16:38:41,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,199 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 13 [2021-06-05 16:38:41,199 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,207 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 16 [2021-06-05 16:38:41,208 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,216 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 41 treesize of output 16 [2021-06-05 16:38:41,217 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,224 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 13 [2021-06-05 16:38:41,225 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,233 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 30 treesize of output 16 [2021-06-05 16:38:41,233 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:38:41,241 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,249 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 37 treesize of output 19 [2021-06-05 16:38:41,249 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,256 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 16 [2021-06-05 16:38:41,257 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,264 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 13 [2021-06-05 16:38:41,265 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:41,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:38:41,269 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 35 treesize of output 19 [2021-06-05 16:38:41,270 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:41,298 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-06-05 16:38:41,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:38:41,300 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-05 16:38:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:41,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499735868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:41,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:41,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:38:41,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212292364] [2021-06-05 16:38:41,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:38:41,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:38:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:38:41,318 INFO L87 Difference]: Start difference. First operand 1932 states and 6551 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:41,716 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-05 16:38:41,961 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 16:38:42,210 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 16:38:42,552 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 16:38:42,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:42,854 INFO L93 Difference]: Finished difference Result 2505 states and 8099 transitions. [2021-06-05 16:38:42,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:38:42,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:38:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:42,858 INFO L225 Difference]: With dead ends: 2505 [2021-06-05 16:38:42,858 INFO L226 Difference]: Without dead ends: 2483 [2021-06-05 16:38:42,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1624.2ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:38:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-06-05 16:38:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 1948. [2021-06-05 16:38:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.3954802259887007) internal successors, (6611), 1947 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6611 transitions. [2021-06-05 16:38:42,881 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6611 transitions. Word has length 26 [2021-06-05 16:38:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:42,881 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6611 transitions. [2021-06-05 16:38:42,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6611 transitions. [2021-06-05 16:38:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:42,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:42,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:43,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:43,084 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 50 times [2021-06-05 16:38:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:43,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657252575] [2021-06-05 16:38:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:43,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:43,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657252575] [2021-06-05 16:38:43,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657252575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:43,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085445537] [2021-06-05 16:38:43,486 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:43,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:43,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:43,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:38:43,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:44,045 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:38:44,357 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:38:44,507 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_421, v_prenex_422, v_prenex_425], 6=[v_prenex_426, A, v_prenex_420, v_prenex_423, v_prenex_424]} [2021-06-05 16:38:44,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:44,548 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:38:44,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:45,006 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 136 [2021-06-05 16:38:45,006 INFO L628 ElimStorePlain]: treesize reduction 307, result has 56.1 percent of original size [2021-06-05 16:38:45,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:45,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:38:45,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:45,192 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:38:45,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:45,217 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:38:45,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:38:45,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:45,408 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:38:45,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:45,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:45,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:45,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-05 16:38:45,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:45,589 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:38:45,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:45,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:45,613 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:38:45,613 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 25 treesize of output 27 [2021-06-05 16:38:45,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:45,768 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:38:45,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:45,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:45,790 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:38:45,790 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 16:38:45,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:45,942 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:38:45,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:45,967 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:38:45,967 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 30 treesize of output 30 [2021-06-05 16:38:45,971 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:46,116 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:38:46,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:46,137 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:38:46,137 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 32 treesize of output 26 [2021-06-05 16:38:46,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:46,279 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:38:46,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:46,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:38:46,292 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:706, output treesize:429 [2021-06-05 16:38:46,547 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-05 16:38:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:46,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085445537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:46,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:46,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:38:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262434359] [2021-06-05 16:38:46,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:38:46,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:46,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:38:46,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:38:46,672 INFO L87 Difference]: Start difference. First operand 1948 states and 6611 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) [2021-06-05 16:38:47,252 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 16:38:47,648 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-06-05 16:38:47,943 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 16:38:48,205 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-05 16:38:48,487 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 16:38:49,259 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2021-06-05 16:38:50,149 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2021-06-05 16:38:51,016 WARN L205 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 95 [2021-06-05 16:38:51,612 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 105 [2021-06-05 16:38:52,584 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-05 16:38:53,106 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 84 [2021-06-05 16:38:53,849 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 101 [2021-06-05 16:38:54,089 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 16:38:54,305 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-06-05 16:38:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:54,550 INFO L93 Difference]: Finished difference Result 2657 states and 8685 transitions. [2021-06-05 16:38:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:38:54,551 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 [2021-06-05 16:38:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:54,554 INFO L225 Difference]: With dead ends: 2657 [2021-06-05 16:38:54,555 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 16:38:54,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 8162.0ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:38:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 16:38:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1952. [2021-06-05 16:38:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 3.3956945156330085) internal successors, (6625), 1951 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 6625 transitions. [2021-06-05 16:38:54,578 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 6625 transitions. Word has length 26 [2021-06-05 16:38:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:54,578 INFO L482 AbstractCegarLoop]: Abstraction has 1952 states and 6625 transitions. [2021-06-05 16:38:54,578 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) [2021-06-05 16:38:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 6625 transitions. [2021-06-05 16:38:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:54,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:54,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:54,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3193,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:54,781 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 51 times [2021-06-05 16:38:54,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:54,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163191713] [2021-06-05 16:38:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:55,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:55,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163191713] [2021-06-05 16:38:55,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163191713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:55,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775294638] [2021-06-05 16:38:55,128 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:55,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:38:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:55,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:38:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:55,487 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:38:55,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:55,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:55,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:38:55,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:55,686 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:38:55,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:55,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:55,701 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:55,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:38:55,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:55,816 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:38:55,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:55,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:55,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:55,830 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 16 treesize of output 18 [2021-06-05 16:38:55,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:55,940 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:38:55,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:55,954 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:55,954 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 17 [2021-06-05 16:38:55,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:56,060 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:38:56,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:56,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:56,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:56,073 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 24 [2021-06-05 16:38:56,074 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:56,178 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:38:56,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:56,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:56,191 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 33 treesize of output 27 [2021-06-05 16:38:56,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:56,295 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:38:56,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:56,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:56,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:56,307 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 33 treesize of output 27 [2021-06-05 16:38:56,308 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:56,409 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:38:56,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:38:56,421 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:38:56,421 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 17 [2021-06-05 16:38:56,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:38:56,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:38:56,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:38:56,527 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:325, output treesize:174 [2021-06-05 16:38:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:56,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775294638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:56,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:56,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:38:56,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907642366] [2021-06-05 16:38:56,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:38:56,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:56,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:38:56,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:38:56,723 INFO L87 Difference]: Start difference. First operand 1952 states and 6625 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) [2021-06-05 16:38:57,016 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 16:38:57,848 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-05 16:38:58,155 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 16:38:58,298 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 16:38:58,656 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 16:38:58,914 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-05 16:38:59,132 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 16:38:59,341 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-05 16:38:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:59,452 INFO L93 Difference]: Finished difference Result 2972 states and 9683 transitions. [2021-06-05 16:38:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:38:59,452 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 [2021-06-05 16:38:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:59,456 INFO L225 Difference]: With dead ends: 2972 [2021-06-05 16:38:59,456 INFO L226 Difference]: Without dead ends: 2942 [2021-06-05 16:38:59,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2966.6ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:38:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-05 16:38:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1949. [2021-06-05 16:38:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1948 states have (on average 3.3983572895277208) internal successors, (6620), 1948 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 6620 transitions. [2021-06-05 16:38:59,484 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 6620 transitions. Word has length 26 [2021-06-05 16:38:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:59,484 INFO L482 AbstractCegarLoop]: Abstraction has 1949 states and 6620 transitions. [2021-06-05 16:38:59,484 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) [2021-06-05 16:38:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 6620 transitions. [2021-06-05 16:38:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:38:59,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:59,486 INFO L521 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] [2021-06-05 16:38:59,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-06-05 16:38:59,687 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:59,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:59,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-06-05 16:38:59,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:59,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138884689] [2021-06-05 16:38:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:59,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:59,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138884689] [2021-06-05 16:38:59,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138884689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:59,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203138890] [2021-06-05 16:38:59,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:00,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:39:00,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:00,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:39:00,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,546 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 16 [2021-06-05 16:39:00,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,555 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 13 [2021-06-05 16:39:00,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,565 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 16 [2021-06-05 16:39:00,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,575 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 28 treesize of output 13 [2021-06-05 16:39:00,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,584 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 37 treesize of output 19 [2021-06-05 16:39:00,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,593 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 33 treesize of output 13 [2021-06-05 16:39:00,594 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,603 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 30 treesize of output 16 [2021-06-05 16:39:00,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,612 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 35 treesize of output 19 [2021-06-05 16:39:00,613 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,621 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 35 treesize of output 19 [2021-06-05 16:39:00,622 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,631 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 16 [2021-06-05 16:39:00,631 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,639 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 13 [2021-06-05 16:39:00,640 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,648 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 16 [2021-06-05 16:39:00,649 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,657 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 19 [2021-06-05 16:39:00,658 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,666 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 30 treesize of output 16 [2021-06-05 16:39:00,666 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:00,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:00,671 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 13 [2021-06-05 16:39:00,672 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:00,699 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-05 16:39:00,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:39:00,700 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-05 16:39:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:00,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203138890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:00,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:00,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:39:00,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921592492] [2021-06-05 16:39:00,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:39:00,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:00,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:39:00,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:39:00,737 INFO L87 Difference]: Start difference. First operand 1949 states and 6620 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) [2021-06-05 16:39:01,624 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 16:39:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:02,095 INFO L93 Difference]: Finished difference Result 3403 states and 10936 transitions. [2021-06-05 16:39:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:39:02,095 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 [2021-06-05 16:39:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:02,100 INFO L225 Difference]: With dead ends: 3403 [2021-06-05 16:39:02,100 INFO L226 Difference]: Without dead ends: 3373 [2021-06-05 16:39:02,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1437.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:39:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2021-06-05 16:39:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 2041. [2021-06-05 16:39:02,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4073529411764705) internal successors, (6951), 2040 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6951 transitions. [2021-06-05 16:39:02,133 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6951 transitions. Word has length 26 [2021-06-05 16:39:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:02,133 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 6951 transitions. [2021-06-05 16:39:02,133 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) [2021-06-05 16:39:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6951 transitions. [2021-06-05 16:39:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:02,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:02,135 INFO L521 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] [2021-06-05 16:39:02,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:02,336 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:02,336 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-06-05 16:39:02,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:02,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238032264] [2021-06-05 16:39:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:02,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238032264] [2021-06-05 16:39:02,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238032264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198084951] [2021-06-05 16:39:02,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:02,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:39:02,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:39:02,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:03,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,202 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-05 16:39:03,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 41 [2021-06-05 16:39:03,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:03,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 59 [2021-06-05 16:39:03,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,271 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:03,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:39:03,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,307 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-05 16:39:03,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-06-05 16:39:03,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,331 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:03,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 16:39:03,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,363 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-05 16:39:03,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 28 [2021-06-05 16:39:03,364 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,385 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:03,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:39:03,386 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:03,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 16:39:03,431 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,469 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-05 16:39:03,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 16:39:03,473 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,494 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:03,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 16:39:03,495 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,526 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-05 16:39:03,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 25 [2021-06-05 16:39:03,528 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,559 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-06-05 16:39:03,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-06-05 16:39:03,560 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,582 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:03,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-06-05 16:39:03,582 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,602 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:03,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:39:03,602 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,621 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:03,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 16:39:03,622 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:03,650 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:39:03,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:39:03,651 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:03,909 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-06-05 16:39:03,909 INFO L628 ElimStorePlain]: treesize reduction 193, result has 41.2 percent of original size [2021-06-05 16:39:03,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:39:03,914 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:150 [2021-06-05 16:39:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:04,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198084951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:04,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:04,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:39:04,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704770056] [2021-06-05 16:39:04,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:39:04,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:04,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:39:04,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:39:04,165 INFO L87 Difference]: Start difference. First operand 2041 states and 6951 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) [2021-06-05 16:39:05,475 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-05 16:39:05,604 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-06-05 16:39:06,023 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:39:06,325 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-05 16:39:06,691 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-05 16:39:06,876 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-05 16:39:07,197 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 16:39:07,383 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-05 16:39:07,612 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 16:39:07,743 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-05 16:39:08,003 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-05 16:39:08,166 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-06-05 16:39:08,353 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 16:39:08,654 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-06-05 16:39:08,834 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 16:39:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:09,021 INFO L93 Difference]: Finished difference Result 3293 states and 10339 transitions. [2021-06-05 16:39:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:39:09,021 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 [2021-06-05 16:39:09,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:09,026 INFO L225 Difference]: With dead ends: 3293 [2021-06-05 16:39:09,026 INFO L226 Difference]: Without dead ends: 3220 [2021-06-05 16:39:09,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 4744.6ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:39:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-06-05 16:39:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2049. [2021-06-05 16:39:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-06-05 16:39:09,055 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-06-05 16:39:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:09,056 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-06-05 16:39:09,056 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) [2021-06-05 16:39:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-06-05 16:39:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:09,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:09,058 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:09,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-06-05 16:39:09,269 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash -272116042, now seen corresponding path program 52 times [2021-06-05 16:39:09,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:09,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559894928] [2021-06-05 16:39:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:09,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:09,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559894928] [2021-06-05 16:39:09,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559894928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:09,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985899122] [2021-06-05 16:39:09,690 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:09,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:09,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:09,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:39:09,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:10,155 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:39:10,261 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_460, v_prenex_455, v_prenex_457], 6=[A, v_prenex_450, v_prenex_453, v_prenex_444, v_prenex_446]} [2021-06-05 16:39:10,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:10,293 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:39:10,293 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 26 treesize of output 28 [2021-06-05 16:39:10,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:10,685 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2021-06-05 16:39:10,686 INFO L628 ElimStorePlain]: treesize reduction 283, result has 56.5 percent of original size [2021-06-05 16:39:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:10,713 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:39:10,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:39:10,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:10,867 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-06-05 16:39:10,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:10,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:10,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:10,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:39:10,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:11,202 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 149 [2021-06-05 16:39:11,203 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-06-05 16:39:11,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:11,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:11,223 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 28 treesize of output 32 [2021-06-05 16:39:11,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:11,513 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 140 [2021-06-05 16:39:11,514 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-06-05 16:39:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:11,538 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:39:11,538 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:39:11,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:11,682 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-05 16:39:11,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:11,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:11,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 26 [2021-06-05 16:39:11,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:11,855 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:39:11,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:11,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:11,879 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:39:11,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:39:11,882 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:12,009 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 16:39:12,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:12,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:12,030 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:39:12,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:39:12,031 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:12,155 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 16:39:12,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:12,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:39:12,173 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:658, output treesize:346 [2021-06-05 16:39:12,398 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 16:39:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:12,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985899122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:12,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:12,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:39:12,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363701464] [2021-06-05 16:39:12,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:39:12,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:12,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:39:12,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:39:12,504 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 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) [2021-06-05 16:39:13,851 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 16:39:13,978 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 16:39:14,424 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 16:39:14,660 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:39:15,072 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-05 16:39:15,408 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2021-06-05 16:39:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:15,473 INFO L93 Difference]: Finished difference Result 2966 states and 9810 transitions. [2021-06-05 16:39:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:39:15,473 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 [2021-06-05 16:39:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:15,477 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 16:39:15,477 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 16:39:15,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 3405.5ms TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:39:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 16:39:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2061. [2021-06-05 16:39:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-06-05 16:39:15,504 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-06-05 16:39:15,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:15,504 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-06-05 16:39:15,504 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) [2021-06-05 16:39:15,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-06-05 16:39:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:15,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:15,506 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:15,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:15,706 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:15,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 53 times [2021-06-05 16:39:15,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:15,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571299473] [2021-06-05 16:39:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:16,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:16,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571299473] [2021-06-05 16:39:16,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571299473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:16,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484652539] [2021-06-05 16:39:16,096 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:16,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:39:16,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:39:16,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:16,675 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 16:39:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:16,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:16,783 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 16 treesize of output 18 [2021-06-05 16:39:16,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:16,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:16,798 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:16,799 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 17 [2021-06-05 16:39:16,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:16,935 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-05 16:39:16,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:16,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:16,949 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 33 treesize of output 27 [2021-06-05 16:39:16,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:16,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:16,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:39:16,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:17,105 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:39:17,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:17,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:17,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:17,122 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 24 [2021-06-05 16:39:17,124 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:17,134 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:17,134 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 21 treesize of output 17 [2021-06-05 16:39:17,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:17,257 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:39:17,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:17,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:17,270 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:17,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:39:17,272 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:17,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:17,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:17,281 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 28 treesize of output 24 [2021-06-05 16:39:17,285 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:17,388 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 16:39:17,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:17,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:39:17,394 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:341, output treesize:174 [2021-06-05 16:39:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:17,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484652539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:17,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:17,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:39:17,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020190140] [2021-06-05 16:39:17,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:39:17,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:39:17,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:39:17,595 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 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) [2021-06-05 16:39:18,171 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 16:39:18,400 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 16:39:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:18,886 INFO L93 Difference]: Finished difference Result 2612 states and 8738 transitions. [2021-06-05 16:39:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:39:18,887 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 [2021-06-05 16:39:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:18,890 INFO L225 Difference]: With dead ends: 2612 [2021-06-05 16:39:18,890 INFO L226 Difference]: Without dead ends: 2587 [2021-06-05 16:39:18,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1862.4ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:39:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-06-05 16:39:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2061. [2021-06-05 16:39:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.404368932038835) internal successors, (7013), 2060 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7013 transitions. [2021-06-05 16:39:18,915 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7013 transitions. Word has length 26 [2021-06-05 16:39:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:18,915 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7013 transitions. [2021-06-05 16:39:18,915 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) [2021-06-05 16:39:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7013 transitions. [2021-06-05 16:39:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:18,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:18,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:19,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:19,118 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1086187700, now seen corresponding path program 54 times [2021-06-05 16:39:19,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:19,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580839446] [2021-06-05 16:39:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:19,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580839446] [2021-06-05 16:39:19,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580839446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648457168] [2021-06-05 16:39:19,582 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:19,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:39:19,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:19,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:39:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,842 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:19,842 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 28 treesize of output 16 [2021-06-05 16:39:19,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:19,851 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 28 treesize of output 16 [2021-06-05 16:39:19,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:19,860 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 33 treesize of output 19 [2021-06-05 16:39:19,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,872 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:19,872 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 17 [2021-06-05 16:39:19,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:19,885 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 33 treesize of output 27 [2021-06-05 16:39:19,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,898 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:19,898 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 17 [2021-06-05 16:39:19,899 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,908 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:19,908 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 33 treesize of output 19 [2021-06-05 16:39:19,909 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:19,920 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 24 [2021-06-05 16:39:19,922 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,930 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:19,931 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 16 [2021-06-05 16:39:19,931 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:19,942 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 16 treesize of output 18 [2021-06-05 16:39:19,946 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,955 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:19,955 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 [2021-06-05 16:39:19,956 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:19,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:39:19,969 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,981 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:19,981 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 28 treesize of output 20 [2021-06-05 16:39:19,983 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:19,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:19,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:19,993 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 28 treesize of output 24 [2021-06-05 16:39:19,997 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:20,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:20,005 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:20,005 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 [2021-06-05 16:39:20,006 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:20,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:20,011 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:20,011 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 [2021-06-05 16:39:20,012 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:20,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:20,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:39:20,090 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-05 16:39:20,213 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 16:39:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:20,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648457168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:20,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:20,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:39:20,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839970071] [2021-06-05 16:39:20,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:39:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:39:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:39:20,312 INFO L87 Difference]: Start difference. First operand 2061 states and 7013 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) [2021-06-05 16:39:20,704 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-05 16:39:21,795 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 16:39:22,085 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-05 16:39:22,275 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 16:39:22,570 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-05 16:39:22,928 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 16:39:23,247 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-06-05 16:39:23,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:23,316 INFO L93 Difference]: Finished difference Result 2664 states and 8880 transitions. [2021-06-05 16:39:23,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:39:23,317 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 [2021-06-05 16:39:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:23,321 INFO L225 Difference]: With dead ends: 2664 [2021-06-05 16:39:23,321 INFO L226 Difference]: Without dead ends: 2649 [2021-06-05 16:39:23,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 3100.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:39:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-06-05 16:39:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2049. [2021-06-05 16:39:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.4072265625) internal successors, (6978), 2048 states have internal predecessors, (6978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6978 transitions. [2021-06-05 16:39:23,349 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6978 transitions. Word has length 26 [2021-06-05 16:39:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:23,349 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 6978 transitions. [2021-06-05 16:39:23,349 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) [2021-06-05 16:39:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6978 transitions. [2021-06-05 16:39:23,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:23,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:23,352 INFO L521 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] [2021-06-05 16:39:23,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:23,552 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-06-05 16:39:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689492744] [2021-06-05 16:39:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:23,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:23,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689492744] [2021-06-05 16:39:23,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689492744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:23,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393886218] [2021-06-05 16:39:23,935 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:39:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:24,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,473 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 35 treesize of output 19 [2021-06-05 16:39:24,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,481 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 35 treesize of output 19 [2021-06-05 16:39:24,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,489 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 13 [2021-06-05 16:39:24,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,498 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 30 treesize of output 16 [2021-06-05 16:39:24,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,506 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 13 [2021-06-05 16:39:24,506 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,514 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 30 treesize of output 16 [2021-06-05 16:39:24,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,522 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 16 [2021-06-05 16:39:24,523 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,530 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:39:24,531 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,538 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 16 [2021-06-05 16:39:24,539 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,546 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 13 [2021-06-05 16:39:24,547 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,555 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 37 treesize of output 19 [2021-06-05 16:39:24,555 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,562 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 32 treesize of output 16 [2021-06-05 16:39:24,563 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,570 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 13 [2021-06-05 16:39:24,571 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,578 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 19 [2021-06-05 16:39:24,578 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:24,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:24,582 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 13 [2021-06-05 16:39:24,583 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:24,611 INFO L628 ElimStorePlain]: treesize reduction 16, result has 62.8 percent of original size [2021-06-05 16:39:24,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:39:24,612 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-05 16:39:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393886218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:24,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:24,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:39:24,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060149673] [2021-06-05 16:39:24,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:39:24,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:24,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:39:24,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:39:24,632 INFO L87 Difference]: Start difference. First operand 2049 states and 6978 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:27,045 INFO L93 Difference]: Finished difference Result 2625 states and 8625 transitions. [2021-06-05 16:39:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:39:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:39:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:27,049 INFO L225 Difference]: With dead ends: 2625 [2021-06-05 16:39:27,049 INFO L226 Difference]: Without dead ends: 2603 [2021-06-05 16:39:27,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2505.9ms TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:39:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-05 16:39:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2047. [2021-06-05 16:39:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.40811339198436) internal successors, (6973), 2046 states have internal predecessors, (6973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 6973 transitions. [2021-06-05 16:39:27,077 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 6973 transitions. Word has length 26 [2021-06-05 16:39:27,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:27,077 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 6973 transitions. [2021-06-05 16:39:27,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 6973 transitions. [2021-06-05 16:39:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:27,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:27,079 INFO L521 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] [2021-06-05 16:39:27,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-06-05 16:39:27,280 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:27,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-06-05 16:39:27,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:27,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987646306] [2021-06-05 16:39:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:27,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:27,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987646306] [2021-06-05 16:39:27,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987646306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:27,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567260543] [2021-06-05 16:39:27,589 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:27,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:27,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:27,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:39:27,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:27,952 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 16:39:28,003 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_470], 6=[v_prenex_472, v_prenex_474]} [2021-06-05 16:39:28,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:28,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:28,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2021-06-05 16:39:28,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:28,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:28,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:28,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 7 [2021-06-05 16:39:28,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:28,150 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-06-05 16:39:28,150 INFO L628 ElimStorePlain]: treesize reduction 162, result has 46.2 percent of original size [2021-06-05 16:39:28,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:28,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:28,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:28,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13 [2021-06-05 16:39:28,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:28,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:28,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:28,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:28,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:28,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:39:28,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:28,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:28,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:28,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:28,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:28,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:28,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:39:28,242 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:28,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:28,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:39:28,275 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:33 [2021-06-05 16:39:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:28,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567260543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:28,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:28,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:39:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022463931] [2021-06-05 16:39:28,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:39:28,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:28,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:39:28,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:39:28,325 INFO L87 Difference]: Start difference. First operand 2047 states and 6973 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) [2021-06-05 16:39:29,733 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 16:39:29,993 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 16:39:30,146 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 16:39:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:30,264 INFO L93 Difference]: Finished difference Result 2959 states and 9765 transitions. [2021-06-05 16:39:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:39:30,265 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 [2021-06-05 16:39:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:30,269 INFO L225 Difference]: With dead ends: 2959 [2021-06-05 16:39:30,269 INFO L226 Difference]: Without dead ends: 2919 [2021-06-05 16:39:30,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2081.9ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:39:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-06-05 16:39:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2063. [2021-06-05 16:39:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.41270611057226) internal successors, (7037), 2062 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7037 transitions. [2021-06-05 16:39:30,294 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7037 transitions. Word has length 26 [2021-06-05 16:39:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:30,295 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7037 transitions. [2021-06-05 16:39:30,295 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) [2021-06-05 16:39:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7037 transitions. [2021-06-05 16:39:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:30,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:30,297 INFO L521 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] [2021-06-05 16:39:30,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:30,498 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:30,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-06-05 16:39:30,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:30,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785916256] [2021-06-05 16:39:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:30,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:30,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785916256] [2021-06-05 16:39:30,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785916256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:30,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895821671] [2021-06-05 16:39:30,782 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:30,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:39:30,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:30,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:39:30,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:31,209 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 16:39:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:31,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:31,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:31,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:39:31,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:31,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:31,462 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-05 16:39:31,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 39 [2021-06-05 16:39:31,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:32,704 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 198 DAG size of output: 183 [2021-06-05 16:39:32,705 INFO L628 ElimStorePlain]: treesize reduction 42, result has 95.5 percent of original size [2021-06-05 16:39:32,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:32,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:32,770 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-06-05 16:39:32,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:39:32,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:32,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:32,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:32,832 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-05 16:39:32,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 16:39:32,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:34,091 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 188 DAG size of output: 183 [2021-06-05 16:39:34,091 INFO L628 ElimStorePlain]: treesize reduction 24, result has 97.4 percent of original size [2021-06-05 16:39:34,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:34,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:34,143 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-05 16:39:34,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:39:34,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:34,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:34,192 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-05 16:39:34,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:39:34,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:35,341 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2021-06-05 16:39:35,342 INFO L628 ElimStorePlain]: treesize reduction 44, result has 94.9 percent of original size [2021-06-05 16:39:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:35,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:35,392 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-06-05 16:39:35,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:39:35,394 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:35,438 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-06-05 16:39:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:39:35,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:35,966 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:39:35,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:35,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:36,016 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-05 16:39:36,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 39 [2021-06-05 16:39:36,022 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:36,065 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-05 16:39:36,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 16:39:36,070 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:37,032 WARN L205 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2021-06-05 16:39:37,033 INFO L628 ElimStorePlain]: treesize reduction 18, result has 97.7 percent of original size [2021-06-05 16:39:37,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:37,093 INFO L354 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2021-06-05 16:39:37,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 16:39:37,101 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:37,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:37,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:37,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 16:39:37,149 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:37,625 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-05 16:39:37,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:37,676 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-05 16:39:37,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:39:37,679 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:37,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:37,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:37,720 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-06-05 16:39:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:39:37,722 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:38,574 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-06-05 16:39:38,574 INFO L628 ElimStorePlain]: treesize reduction 11, result has 98.4 percent of original size [2021-06-05 16:39:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:38,625 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2021-06-05 16:39:38,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 43 [2021-06-05 16:39:38,629 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:38,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:38,670 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-06-05 16:39:38,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 36 [2021-06-05 16:39:38,674 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:39,080 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:39:39,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:39,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-05 16:39:39,126 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:945, output treesize:1467 [2021-06-05 16:39:39,619 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-06-05 16:39:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:39,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895821671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:39,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:39,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:39:39,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511425037] [2021-06-05 16:39:39,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:39:39,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:39,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:39:39,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:39:39,736 INFO L87 Difference]: Start difference. First operand 2063 states and 7037 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:40,417 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2021-06-05 16:39:40,677 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2021-06-05 16:39:41,116 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-06-05 16:39:41,660 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 16:39:41,835 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-06-05 16:39:42,183 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2021-06-05 16:39:42,656 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 16:39:42,898 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 16:39:43,108 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2021-06-05 16:39:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:43,198 INFO L93 Difference]: Finished difference Result 2842 states and 9205 transitions. [2021-06-05 16:39:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:39:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:39:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:43,202 INFO L225 Difference]: With dead ends: 2842 [2021-06-05 16:39:43,202 INFO L226 Difference]: Without dead ends: 2798 [2021-06-05 16:39:43,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3956.0ms TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:39:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-06-05 16:39:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2136. [2021-06-05 16:39:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.406088992974239) internal successors, (7272), 2135 states have internal predecessors, (7272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7272 transitions. [2021-06-05 16:39:43,230 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7272 transitions. Word has length 26 [2021-06-05 16:39:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:43,231 INFO L482 AbstractCegarLoop]: Abstraction has 2136 states and 7272 transitions. [2021-06-05 16:39:43,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7272 transitions. [2021-06-05 16:39:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:43,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:43,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:43,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:43,433 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash -550813574, now seen corresponding path program 55 times [2021-06-05 16:39:43,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:43,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635509877] [2021-06-05 16:39:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:43,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:43,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635509877] [2021-06-05 16:39:43,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635509877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:43,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655339605] [2021-06-05 16:39:43,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:43,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:39:43,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:44,287 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:39:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:44,407 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:39:44,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:39:44,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:44,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:44,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:44,433 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 21 treesize of output 29 [2021-06-05 16:39:44,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:44,790 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 147 [2021-06-05 16:39:44,791 INFO L628 ElimStorePlain]: treesize reduction 194, result has 64.3 percent of original size [2021-06-05 16:39:44,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:44,817 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:39:44,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 16:39:44,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:44,962 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-05 16:39:44,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:44,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:44,987 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:39:44,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 [2021-06-05 16:39:44,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:45,129 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 16:39:45,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:45,155 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:39:45,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-05 16:39:45,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:45,296 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 16:39:45,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:45,320 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:39:45,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 [2021-06-05 16:39:45,324 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:45,458 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 16:39:45,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:45,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:45,481 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:39:45,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:39:45,482 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:45,627 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:39:45,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:45,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:45,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:45,645 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:39:45,651 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:45,902 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 120 [2021-06-05 16:39:45,903 INFO L628 ElimStorePlain]: treesize reduction 12, result has 95.8 percent of original size [2021-06-05 16:39:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:45,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:45,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:39:45,924 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:46,168 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-06-05 16:39:46,168 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-06-05 16:39:46,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:39:46,186 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:583, output treesize:253 [2021-06-05 16:39:46,383 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-05 16:39:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:46,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655339605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:46,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:46,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:39:46,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068540301] [2021-06-05 16:39:46,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:39:46,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:46,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:39:46,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:39:46,485 INFO L87 Difference]: Start difference. First operand 2136 states and 7272 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) [2021-06-05 16:39:47,672 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-05 16:39:47,903 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 16:39:48,124 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:39:48,546 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-05 16:39:48,914 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-05 16:39:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:48,983 INFO L93 Difference]: Finished difference Result 3051 states and 10102 transitions. [2021-06-05 16:39:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:39:48,983 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 [2021-06-05 16:39:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:48,988 INFO L225 Difference]: With dead ends: 3051 [2021-06-05 16:39:48,988 INFO L226 Difference]: Without dead ends: 3036 [2021-06-05 16:39:48,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2941.9ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:39:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-06-05 16:39:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2138. [2021-06-05 16:39:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.402433317735143) internal successors, (7271), 2137 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7271 transitions. [2021-06-05 16:39:49,017 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7271 transitions. Word has length 26 [2021-06-05 16:39:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:49,017 INFO L482 AbstractCegarLoop]: Abstraction has 2138 states and 7271 transitions. [2021-06-05 16:39:49,017 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) [2021-06-05 16:39:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7271 transitions. [2021-06-05 16:39:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:49,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:49,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:49,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3761,119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:49,220 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 56 times [2021-06-05 16:39:49,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:49,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930938072] [2021-06-05 16:39:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:49,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:49,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930938072] [2021-06-05 16:39:49,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930938072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:49,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046295776] [2021-06-05 16:39:49,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:49,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:49,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:49,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:39:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,893 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:49,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:39:49,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,902 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:49,903 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 28 treesize of output 16 [2021-06-05 16:39:49,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,911 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:49,911 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 33 treesize of output 19 [2021-06-05 16:39:49,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,924 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:49,924 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 17 [2021-06-05 16:39:49,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:49,937 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 33 treesize of output 27 [2021-06-05 16:39:49,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,949 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:49,949 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 17 [2021-06-05 16:39:49,951 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,960 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:49,960 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 33 treesize of output 19 [2021-06-05 16:39:49,961 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:49,972 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 24 [2021-06-05 16:39:49,973 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,982 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:49,982 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 26 treesize of output 16 [2021-06-05 16:39:49,982 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:49,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:49,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:49,993 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 16 treesize of output 18 [2021-06-05 16:39:49,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:50,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:50,007 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 36 treesize of output 22 [2021-06-05 16:39:50,007 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:50,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:50,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:39:50,021 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:50,033 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:50,033 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 28 treesize of output 20 [2021-06-05 16:39:50,034 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:50,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:50,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:39:50,048 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:50,057 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:50,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-05 16:39:50,057 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:50,064 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:39:50,064 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 [2021-06-05 16:39:50,065 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:50,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:50,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:39:50,144 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-06-05 16:39:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:50,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046295776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:50,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:50,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:39:50,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926791199] [2021-06-05 16:39:50,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:39:50,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:50,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:39:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:39:50,355 INFO L87 Difference]: Start difference. First operand 2138 states and 7271 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) [2021-06-05 16:39:50,668 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 16:39:51,541 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 16:39:51,730 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-06-05 16:39:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:51,814 INFO L93 Difference]: Finished difference Result 2900 states and 9631 transitions. [2021-06-05 16:39:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:39:51,814 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 [2021-06-05 16:39:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:51,818 INFO L225 Difference]: With dead ends: 2900 [2021-06-05 16:39:51,818 INFO L226 Difference]: Without dead ends: 2875 [2021-06-05 16:39:51,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1710.8ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:39:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-06-05 16:39:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2131. [2021-06-05 16:39:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.3995305164319247) internal successors, (7241), 2130 states have internal predecessors, (7241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7241 transitions. [2021-06-05 16:39:51,856 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7241 transitions. Word has length 26 [2021-06-05 16:39:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:51,856 INFO L482 AbstractCegarLoop]: Abstraction has 2131 states and 7241 transitions. [2021-06-05 16:39:51,857 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) [2021-06-05 16:39:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7241 transitions. [2021-06-05 16:39:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:51,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:51,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:52,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:52,061 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash 807490168, now seen corresponding path program 57 times [2021-06-05 16:39:52,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:52,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066082773] [2021-06-05 16:39:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:52,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066082773] [2021-06-05 16:39:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066082773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154456614] [2021-06-05 16:39:52,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:52,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:39:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:39:52,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:53,025 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:39:53,386 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 68 [2021-06-05 16:39:53,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:53,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:53,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:53,531 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 28 treesize of output 16 [2021-06-05 16:39:53,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:53,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:53,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:53,538 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 33 treesize of output 19 [2021-06-05 16:39:53,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:53,722 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 16:39:53,723 INFO L628 ElimStorePlain]: treesize reduction 143, result has 51.5 percent of original size [2021-06-05 16:39:53,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:53,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:39:53,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:53,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:53,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:53,804 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:39:53,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:53,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:53,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:53,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:39:53,810 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 28 treesize of output 16 [2021-06-05 16:39:53,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:53,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:53,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:53,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:39:53,869 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:53,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:53,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:39:53,921 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:333, output treesize:51 [2021-06-05 16:39:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:53,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154456614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:53,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:53,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:39:53,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844324152] [2021-06-05 16:39:53,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:39:53,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:53,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:39:53,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:39:53,978 INFO L87 Difference]: Start difference. First operand 2131 states and 7241 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) [2021-06-05 16:39:54,791 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 16:39:55,183 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:39:55,634 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 83 [2021-06-05 16:39:55,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:55,762 INFO L93 Difference]: Finished difference Result 2671 states and 8927 transitions. [2021-06-05 16:39:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:39:55,762 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 [2021-06-05 16:39:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:55,766 INFO L225 Difference]: With dead ends: 2671 [2021-06-05 16:39:55,766 INFO L226 Difference]: Without dead ends: 2656 [2021-06-05 16:39:55,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2357.1ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:39:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-06-05 16:39:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2119. [2021-06-05 16:39:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.4022662889518416) internal successors, (7206), 2118 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:55,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7206 transitions. [2021-06-05 16:39:55,790 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7206 transitions. Word has length 26 [2021-06-05 16:39:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:55,790 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7206 transitions. [2021-06-05 16:39:55,791 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) [2021-06-05 16:39:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7206 transitions. [2021-06-05 16:39:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:55,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:55,793 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:55,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-06-05 16:39:55,993 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-05 16:39:55,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:55,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940216270] [2021-06-05 16:39:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:56,226 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-06-05 16:39:56,371 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-06-05 16:39:56,574 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 16:39:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:56,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:56,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940216270] [2021-06-05 16:39:56,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940216270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:56,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453684758] [2021-06-05 16:39:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:56,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:56,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:39:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:57,079 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:39:57,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:57,200 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:57,200 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 28 treesize of output 20 [2021-06-05 16:39:57,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:57,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:57,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,212 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 28 treesize of output 24 [2021-06-05 16:39:57,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:57,351 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:39:57,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:57,365 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:57,366 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 17 [2021-06-05 16:39:57,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:57,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,378 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 16 treesize of output 18 [2021-06-05 16:39:57,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:57,502 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 16:39:57,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:57,515 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:39:57,516 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 17 [2021-06-05 16:39:57,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:57,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,527 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 24 [2021-06-05 16:39:57,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:57,642 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 16:39:57,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:57,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,656 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 33 treesize of output 27 [2021-06-05 16:39:57,657 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:39:57,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,667 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 33 treesize of output 27 [2021-06-05 16:39:57,669 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:39:57,785 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 16:39:57,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:39:57,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:39:57,791 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:333, output treesize:174 [2021-06-05 16:39:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:57,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453684758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:57,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:57,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:39:57,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701347719] [2021-06-05 16:39:57,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:39:57,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:39:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:39:57,987 INFO L87 Difference]: Start difference. First operand 2119 states and 7206 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) [2021-06-05 16:39:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:59,108 INFO L93 Difference]: Finished difference Result 2740 states and 9175 transitions. [2021-06-05 16:39:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:39:59,109 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 [2021-06-05 16:39:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:59,113 INFO L225 Difference]: With dead ends: 2740 [2021-06-05 16:39:59,113 INFO L226 Difference]: Without dead ends: 2725 [2021-06-05 16:39:59,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1753.6ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:39:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-05 16:39:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 2113. [2021-06-05 16:39:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.403409090909091) internal successors, (7188), 2112 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7188 transitions. [2021-06-05 16:39:59,138 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7188 transitions. Word has length 26 [2021-06-05 16:39:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:59,138 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 7188 transitions. [2021-06-05 16:39:59,138 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) [2021-06-05 16:39:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7188 transitions. [2021-06-05 16:39:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:39:59,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:59,140 INFO L521 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] [2021-06-05 16:39:59,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-06-05 16:39:59,341 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:59,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1128807410, now seen corresponding path program 64 times [2021-06-05 16:39:59,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:59,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680939110] [2021-06-05 16:39:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:59,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:59,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680939110] [2021-06-05 16:39:59,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680939110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:59,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066866893] [2021-06-05 16:39:59,753 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:59,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:59,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:59,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:39:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:00,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,226 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 30 treesize of output 16 [2021-06-05 16:40:00,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,234 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 16 [2021-06-05 16:40:00,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,242 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 16 [2021-06-05 16:40:00,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,250 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 34 treesize of output 16 [2021-06-05 16:40:00,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,258 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 13 [2021-06-05 16:40:00,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,266 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 16 [2021-06-05 16:40:00,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,274 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 37 treesize of output 19 [2021-06-05 16:40:00,274 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,281 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 13 [2021-06-05 16:40:00,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 19 [2021-06-05 16:40:00,290 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:40:00,297 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,304 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 13 [2021-06-05 16:40:00,305 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,312 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 13 [2021-06-05 16:40:00,312 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:40:00,320 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,327 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 35 treesize of output 19 [2021-06-05 16:40:00,328 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:40:00,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:40:00,331 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 13 [2021-06-05 16:40:00,332 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:40:00,360 INFO L628 ElimStorePlain]: treesize reduction 32, result has 45.8 percent of original size [2021-06-05 16:40:00,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:40:00,362 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-06-05 16:40:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:00,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066866893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:00,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:00,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:40:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936273188] [2021-06-05 16:40:00,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:40:00,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:40:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:40:00,398 INFO L87 Difference]: Start difference. First operand 2113 states and 7188 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) [2021-06-05 16:40:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:01,905 INFO L93 Difference]: Finished difference Result 2992 states and 9892 transitions. [2021-06-05 16:40:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:40:01,906 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 [2021-06-05 16:40:01,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:01,910 INFO L225 Difference]: With dead ends: 2992 [2021-06-05 16:40:01,910 INFO L226 Difference]: Without dead ends: 2955 [2021-06-05 16:40:01,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1657.5ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:40:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-06-05 16:40:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2104. [2021-06-05 16:40:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.4013314312886354) internal successors, (7153), 2103 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7153 transitions. [2021-06-05 16:40:01,939 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7153 transitions. Word has length 26 [2021-06-05 16:40:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:01,939 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 7153 transitions. [2021-06-05 16:40:01,939 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) [2021-06-05 16:40:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7153 transitions. [2021-06-05 16:40:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:01,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:01,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:02,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3871,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:02,142 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:02,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-05 16:40:02,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:02,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756202680] [2021-06-05 16:40:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:02,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:02,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756202680] [2021-06-05 16:40:02,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756202680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:02,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423887258] [2021-06-05 16:40:02,185 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:02,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:40:02,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:02,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:02,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423887258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:02,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:02,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:40:02,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507337656] [2021-06-05 16:40:02,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:02,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:02,314 INFO L87 Difference]: Start difference. First operand 2104 states and 7153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:03,308 INFO L93 Difference]: Finished difference Result 5069 states and 15729 transitions. [2021-06-05 16:40:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:40:03,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:03,315 INFO L225 Difference]: With dead ends: 5069 [2021-06-05 16:40:03,316 INFO L226 Difference]: Without dead ends: 5069 [2021-06-05 16:40:03,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 579.7ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:40:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-06-05 16:40:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 2297. [2021-06-05 16:40:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2296 states have (on average 3.451219512195122) internal successors, (7924), 2296 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 7924 transitions. [2021-06-05 16:40:03,360 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 7924 transitions. Word has length 28 [2021-06-05 16:40:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:03,360 INFO L482 AbstractCegarLoop]: Abstraction has 2297 states and 7924 transitions. [2021-06-05 16:40:03,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 7924 transitions. [2021-06-05 16:40:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:03,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:03,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:03,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:03,563 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-05 16:40:03,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:03,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032875446] [2021-06-05 16:40:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:03,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:03,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032875446] [2021-06-05 16:40:03,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032875446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:03,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23458508] [2021-06-05 16:40:03,651 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:03,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:40:03,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:03,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:03,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23458508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:03,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:03,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:40:03,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231478386] [2021-06-05 16:40:03,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:40:03,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:03,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:40:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:40:03,824 INFO L87 Difference]: Start difference. First operand 2297 states and 7924 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:05,253 INFO L93 Difference]: Finished difference Result 6700 states and 20456 transitions. [2021-06-05 16:40:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:40:05,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:05,263 INFO L225 Difference]: With dead ends: 6700 [2021-06-05 16:40:05,264 INFO L226 Difference]: Without dead ends: 6700 [2021-06-05 16:40:05,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 844.4ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:40:05,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-06-05 16:40:05,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 2308. [2021-06-05 16:40:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.4581707845687037) internal successors, (7978), 2307 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 7978 transitions. [2021-06-05 16:40:05,320 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 7978 transitions. Word has length 28 [2021-06-05 16:40:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:05,320 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 7978 transitions. [2021-06-05 16:40:05,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 7978 transitions. [2021-06-05 16:40:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:05,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:05,323 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:05,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:05,525 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:05,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-05 16:40:05,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:05,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41265180] [2021-06-05 16:40:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:05,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:05,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41265180] [2021-06-05 16:40:05,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41265180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:05,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271671697] [2021-06-05 16:40:05,570 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:05,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271671697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:05,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:05,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:40:05,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716949213] [2021-06-05 16:40:05,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:40:05,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:05,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:40:05,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:40:05,712 INFO L87 Difference]: Start difference. First operand 2308 states and 7978 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:06,940 INFO L93 Difference]: Finished difference Result 6089 states and 18976 transitions. [2021-06-05 16:40:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:40:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:06,952 INFO L225 Difference]: With dead ends: 6089 [2021-06-05 16:40:06,952 INFO L226 Difference]: Without dead ends: 6089 [2021-06-05 16:40:06,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 765.2ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:40:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2021-06-05 16:40:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 2256. [2021-06-05 16:40:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.4350332594235033) internal successors, (7746), 2255 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7746 transitions. [2021-06-05 16:40:07,014 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7746 transitions. Word has length 28 [2021-06-05 16:40:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:07,014 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 7746 transitions. [2021-06-05 16:40:07,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7746 transitions. [2021-06-05 16:40:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:07,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:07,017 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:07,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3963 [2021-06-05 16:40:07,221 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-05 16:40:07,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:07,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723012705] [2021-06-05 16:40:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:07,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:07,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723012705] [2021-06-05 16:40:07,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723012705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:07,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609478820] [2021-06-05 16:40:07,265 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:07,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:07,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:07,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609478820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:07,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:07,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:40:07,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758963577] [2021-06-05 16:40:07,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:07,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:07,399 INFO L87 Difference]: Start difference. First operand 2256 states and 7746 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:08,510 INFO L93 Difference]: Finished difference Result 5162 states and 15913 transitions. [2021-06-05 16:40:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:40:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:08,517 INFO L225 Difference]: With dead ends: 5162 [2021-06-05 16:40:08,517 INFO L226 Difference]: Without dead ends: 5162 [2021-06-05 16:40:08,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:40:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-05 16:40:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 2269. [2021-06-05 16:40:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 3.432980599647266) internal successors, (7786), 2268 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 7786 transitions. [2021-06-05 16:40:08,560 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 7786 transitions. Word has length 28 [2021-06-05 16:40:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:08,560 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 7786 transitions. [2021-06-05 16:40:08,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 7786 transitions. [2021-06-05 16:40:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:08,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:08,563 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:08,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:08,763 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 65 times [2021-06-05 16:40:08,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:08,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703861297] [2021-06-05 16:40:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:08,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:08,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703861297] [2021-06-05 16:40:08,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703861297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:08,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326433538] [2021-06-05 16:40:08,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:08,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:40:08,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:08,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326433538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:08,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:08,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:40:08,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364870539] [2021-06-05 16:40:08,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:08,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:08,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:08,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:08,928 INFO L87 Difference]: Start difference. First operand 2269 states and 7786 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:09,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:09,526 INFO L93 Difference]: Finished difference Result 4589 states and 14330 transitions. [2021-06-05 16:40:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:40:09,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 16:40:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:09,532 INFO L225 Difference]: With dead ends: 4589 [2021-06-05 16:40:09,532 INFO L226 Difference]: Without dead ends: 4589 [2021-06-05 16:40:09,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:40:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-06-05 16:40:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 2339. [2021-06-05 16:40:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.417023096663815) internal successors, (7989), 2338 states have internal predecessors, (7989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7989 transitions. [2021-06-05 16:40:09,573 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7989 transitions. Word has length 28 [2021-06-05 16:40:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:09,573 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 7989 transitions. [2021-06-05 16:40:09,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7989 transitions. [2021-06-05 16:40:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:09,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:09,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:09,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3965 [2021-06-05 16:40:09,776 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:09,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-05 16:40:09,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:09,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335756327] [2021-06-05 16:40:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:09,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:09,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335756327] [2021-06-05 16:40:09,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335756327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:09,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238751495] [2021-06-05 16:40:09,805 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:09,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:40:09,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:09,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:40:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:09,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238751495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:09,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:09,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:40:09,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429311389] [2021-06-05 16:40:09,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:40:09,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:40:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:40:09,898 INFO L87 Difference]: Start difference. First operand 2339 states and 7989 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:10,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:10,087 INFO L93 Difference]: Finished difference Result 3853 states and 12551 transitions. [2021-06-05 16:40:10,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:40:10,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:10,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:10,092 INFO L225 Difference]: With dead ends: 3853 [2021-06-05 16:40:10,093 INFO L226 Difference]: Without dead ends: 3829 [2021-06-05 16:40:10,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:40:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-06-05 16:40:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 2701. [2021-06-05 16:40:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 3.4851851851851854) internal successors, (9410), 2700 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 9410 transitions. [2021-06-05 16:40:10,132 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 9410 transitions. Word has length 28 [2021-06-05 16:40:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:10,132 INFO L482 AbstractCegarLoop]: Abstraction has 2701 states and 9410 transitions. [2021-06-05 16:40:10,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 9410 transitions. [2021-06-05 16:40:10,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:10,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:10,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:10,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3966 [2021-06-05 16:40:10,336 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:10,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-05 16:40:10,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:10,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319147809] [2021-06-05 16:40:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:10,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:10,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319147809] [2021-06-05 16:40:10,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319147809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:10,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250002452] [2021-06-05 16:40:10,384 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:10,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:10,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:10,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:10,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:10,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250002452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:10,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:10,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:40:10,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999785125] [2021-06-05 16:40:10,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:10,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:10,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:10,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:10,490 INFO L87 Difference]: Start difference. First operand 2701 states and 9410 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:11,095 INFO L93 Difference]: Finished difference Result 4524 states and 14456 transitions. [2021-06-05 16:40:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:40:11,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:40:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:11,102 INFO L225 Difference]: With dead ends: 4524 [2021-06-05 16:40:11,102 INFO L226 Difference]: Without dead ends: 4477 [2021-06-05 16:40:11,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 365.4ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:40:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2021-06-05 16:40:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2866. [2021-06-05 16:40:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 3.505759162303665) internal successors, (10044), 2865 states have internal predecessors, (10044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 10044 transitions. [2021-06-05 16:40:11,150 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 10044 transitions. Word has length 28 [2021-06-05 16:40:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:11,150 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 10044 transitions. [2021-06-05 16:40:11,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:11,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 10044 transitions. [2021-06-05 16:40:11,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:11,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:11,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:11,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3967 [2021-06-05 16:40:11,369 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-05 16:40:11,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:11,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192515466] [2021-06-05 16:40:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:11,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:11,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192515466] [2021-06-05 16:40:11,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192515466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:11,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887984733] [2021-06-05 16:40:11,404 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:11,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:40:11,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:11,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:11,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:11,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887984733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:11,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:11,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:40:11,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630425270] [2021-06-05 16:40:11,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:11,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:11,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:11,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:11,523 INFO L87 Difference]: Start difference. First operand 2866 states and 10044 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:12,230 INFO L93 Difference]: Finished difference Result 4809 states and 15088 transitions. [2021-06-05 16:40:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:40:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 16:40:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:12,237 INFO L225 Difference]: With dead ends: 4809 [2021-06-05 16:40:12,237 INFO L226 Difference]: Without dead ends: 4783 [2021-06-05 16:40:12,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:40:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-06-05 16:40:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2887. [2021-06-05 16:40:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.512127512127512) internal successors, (10136), 2886 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10136 transitions. [2021-06-05 16:40:12,285 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10136 transitions. Word has length 28 [2021-06-05 16:40:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:12,285 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10136 transitions. [2021-06-05 16:40:12,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10136 transitions. [2021-06-05 16:40:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:12,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:12,289 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:12,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3968,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:12,489 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:12,490 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-05 16:40:12,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:12,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586815873] [2021-06-05 16:40:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:12,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:12,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586815873] [2021-06-05 16:40:12,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586815873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:12,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999499342] [2021-06-05 16:40:12,524 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:12,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:40:12,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:12,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:12,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:12,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999499342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:12,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:12,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:40:12,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085987978] [2021-06-05 16:40:12,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:12,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:12,644 INFO L87 Difference]: Start difference. First operand 2887 states and 10136 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:13,350 INFO L93 Difference]: Finished difference Result 4801 states and 15088 transitions. [2021-06-05 16:40:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:40:13,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 16:40:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:13,357 INFO L225 Difference]: With dead ends: 4801 [2021-06-05 16:40:13,357 INFO L226 Difference]: Without dead ends: 4786 [2021-06-05 16:40:13,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:40:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-05 16:40:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2887. [2021-06-05 16:40:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 3.5076230076230077) internal successors, (10123), 2886 states have internal predecessors, (10123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 10123 transitions. [2021-06-05 16:40:13,407 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 10123 transitions. Word has length 28 [2021-06-05 16:40:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:13,407 INFO L482 AbstractCegarLoop]: Abstraction has 2887 states and 10123 transitions. [2021-06-05 16:40:13,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:13,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 10123 transitions. [2021-06-05 16:40:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:13,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:13,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:13,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-06-05 16:40:13,611 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:13,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:13,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-05 16:40:13,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:13,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495333913] [2021-06-05 16:40:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:13,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:13,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495333913] [2021-06-05 16:40:13,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495333913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:13,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471043355] [2021-06-05 16:40:13,646 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:13,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471043355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:13,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:13,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:40:13,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476661137] [2021-06-05 16:40:13,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:13,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:13,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:13,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:13,743 INFO L87 Difference]: Start difference. First operand 2887 states and 10123 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:14,310 INFO L93 Difference]: Finished difference Result 5555 states and 17807 transitions. [2021-06-05 16:40:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:40:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:14,317 INFO L225 Difference]: With dead ends: 5555 [2021-06-05 16:40:14,318 INFO L226 Difference]: Without dead ends: 5508 [2021-06-05 16:40:14,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 337.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:40:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-06-05 16:40:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3028. [2021-06-05 16:40:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 3.5500495540138752) internal successors, (10746), 3027 states have internal predecessors, (10746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 10746 transitions. [2021-06-05 16:40:14,375 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 10746 transitions. Word has length 28 [2021-06-05 16:40:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:14,376 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 10746 transitions. [2021-06-05 16:40:14,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 10746 transitions. [2021-06-05 16:40:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:14,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:14,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:14,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:14,580 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-05 16:40:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:14,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141629144] [2021-06-05 16:40:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:14,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:14,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141629144] [2021-06-05 16:40:14,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141629144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:14,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954193720] [2021-06-05 16:40:14,604 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:14,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:14,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:40:14,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:14,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954193720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:14,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:14,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:40:14,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431211210] [2021-06-05 16:40:14,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:40:14,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:14,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:40:14,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:40:14,691 INFO L87 Difference]: Start difference. First operand 3028 states and 10746 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:14,857 INFO L93 Difference]: Finished difference Result 4339 states and 14289 transitions. [2021-06-05 16:40:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:40:14,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:14,864 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 16:40:14,864 INFO L226 Difference]: Without dead ends: 4339 [2021-06-05 16:40:14,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:40:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-06-05 16:40:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 2863. [2021-06-05 16:40:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 3.5195667365478687) internal successors, (10073), 2862 states have internal predecessors, (10073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 10073 transitions. [2021-06-05 16:40:14,908 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 10073 transitions. Word has length 28 [2021-06-05 16:40:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:14,908 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 10073 transitions. [2021-06-05 16:40:14,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 10073 transitions. [2021-06-05 16:40:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:14,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:14,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:15,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:15,112 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:15,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:15,112 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-05 16:40:15,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:15,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038827415] [2021-06-05 16:40:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:15,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:15,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038827415] [2021-06-05 16:40:15,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038827415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:15,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444311768] [2021-06-05 16:40:15,149 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:15,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:40:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:15,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444311768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:15,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:15,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:40:15,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835534773] [2021-06-05 16:40:15,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:15,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:15,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:15,253 INFO L87 Difference]: Start difference. First operand 2863 states and 10073 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:15,969 INFO L93 Difference]: Finished difference Result 6209 states and 19661 transitions. [2021-06-05 16:40:15,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:40:15,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 16:40:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:15,978 INFO L225 Difference]: With dead ends: 6209 [2021-06-05 16:40:15,978 INFO L226 Difference]: Without dead ends: 6209 [2021-06-05 16:40:15,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:40:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6209 states. [2021-06-05 16:40:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6209 to 2881. [2021-06-05 16:40:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.5194444444444444) internal successors, (10136), 2880 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10136 transitions. [2021-06-05 16:40:16,051 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10136 transitions. Word has length 28 [2021-06-05 16:40:16,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:16,052 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10136 transitions. [2021-06-05 16:40:16,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10136 transitions. [2021-06-05 16:40:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:16,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:16,055 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:16,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:16,257 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:16,257 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-05 16:40:16,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:16,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451575796] [2021-06-05 16:40:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:16,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451575796] [2021-06-05 16:40:16,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451575796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133176988] [2021-06-05 16:40:16,293 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:16,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:16,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:16,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133176988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:16,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:16,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:40:16,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445399301] [2021-06-05 16:40:16,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:16,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:16,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:16,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:16,397 INFO L87 Difference]: Start difference. First operand 2881 states and 10136 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:17,206 INFO L93 Difference]: Finished difference Result 6471 states and 20458 transitions. [2021-06-05 16:40:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:40:17,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 16:40:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:17,216 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 16:40:17,216 INFO L226 Difference]: Without dead ends: 6471 [2021-06-05 16:40:17,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:40:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-05 16:40:17,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 2975. [2021-06-05 16:40:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.511432414256893) internal successors, (10443), 2974 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10443 transitions. [2021-06-05 16:40:17,281 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10443 transitions. Word has length 28 [2021-06-05 16:40:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:17,282 INFO L482 AbstractCegarLoop]: Abstraction has 2975 states and 10443 transitions. [2021-06-05 16:40:17,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10443 transitions. [2021-06-05 16:40:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:17,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:17,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:17,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3973,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:17,486 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-05 16:40:17,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:17,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251832889] [2021-06-05 16:40:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:17,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:17,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251832889] [2021-06-05 16:40:17,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251832889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:17,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122916737] [2021-06-05 16:40:17,520 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:17,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:40:17,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:17,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:17,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122916737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:17,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:17,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:40:17,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601577091] [2021-06-05 16:40:17,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:17,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:17,627 INFO L87 Difference]: Start difference. First operand 2975 states and 10443 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:18,275 INFO L93 Difference]: Finished difference Result 6662 states and 21078 transitions. [2021-06-05 16:40:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:40:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:18,284 INFO L225 Difference]: With dead ends: 6662 [2021-06-05 16:40:18,285 INFO L226 Difference]: Without dead ends: 6626 [2021-06-05 16:40:18,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:40:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-06-05 16:40:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 3377. [2021-06-05 16:40:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.5390995260663507) internal successors, (11948), 3376 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 11948 transitions. [2021-06-05 16:40:18,351 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 11948 transitions. Word has length 28 [2021-06-05 16:40:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:18,352 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 11948 transitions. [2021-06-05 16:40:18,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 11948 transitions. [2021-06-05 16:40:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:18,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:18,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:18,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:18,556 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-05 16:40:18,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:18,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913804553] [2021-06-05 16:40:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:18,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:18,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913804553] [2021-06-05 16:40:18,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913804553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:18,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519246228] [2021-06-05 16:40:18,593 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:18,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:40:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:18,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:18,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519246228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:18,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:18,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:40:18,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745717922] [2021-06-05 16:40:18,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:18,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:18,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:18,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:18,693 INFO L87 Difference]: Start difference. First operand 3377 states and 11948 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:19,324 INFO L93 Difference]: Finished difference Result 6820 states and 21509 transitions. [2021-06-05 16:40:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:40:19,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:19,334 INFO L225 Difference]: With dead ends: 6820 [2021-06-05 16:40:19,334 INFO L226 Difference]: Without dead ends: 6820 [2021-06-05 16:40:19,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:40:19,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6820 states. [2021-06-05 16:40:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6820 to 3088. [2021-06-05 16:40:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 3.498542274052478) internal successors, (10800), 3087 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:19,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 10800 transitions. [2021-06-05 16:40:19,402 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 10800 transitions. Word has length 28 [2021-06-05 16:40:19,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:19,402 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 10800 transitions. [2021-06-05 16:40:19,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:19,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 10800 transitions. [2021-06-05 16:40:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:19,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:19,406 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:19,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3975 [2021-06-05 16:40:19,607 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-05 16:40:19,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:19,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181287041] [2021-06-05 16:40:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:19,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:19,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181287041] [2021-06-05 16:40:19,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181287041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:19,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625916953] [2021-06-05 16:40:19,644 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:19,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:19,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625916953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:19,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:19,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:40:19,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373177971] [2021-06-05 16:40:19,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:19,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:19,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:19,740 INFO L87 Difference]: Start difference. First operand 3088 states and 10800 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:20,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:20,463 INFO L93 Difference]: Finished difference Result 5973 states and 19224 transitions. [2021-06-05 16:40:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:40:20,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 16:40:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:20,473 INFO L225 Difference]: With dead ends: 5973 [2021-06-05 16:40:20,473 INFO L226 Difference]: Without dead ends: 5969 [2021-06-05 16:40:20,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:40:20,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-06-05 16:40:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 2848. [2021-06-05 16:40:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 3.523709167544784) internal successors, (10032), 2847 states have internal predecessors, (10032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 10032 transitions. [2021-06-05 16:40:20,531 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 10032 transitions. Word has length 28 [2021-06-05 16:40:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:20,531 INFO L482 AbstractCegarLoop]: Abstraction has 2848 states and 10032 transitions. [2021-06-05 16:40:20,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 10032 transitions. [2021-06-05 16:40:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:20,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:20,534 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:20,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3976,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:20,735 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:20,735 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-05 16:40:20,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:20,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564610811] [2021-06-05 16:40:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:20,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:20,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564610811] [2021-06-05 16:40:20,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564610811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:20,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432284513] [2021-06-05 16:40:20,777 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:20,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:20,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:20,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:20,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432284513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:20,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:20,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:40:20,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425491604] [2021-06-05 16:40:20,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:20,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:20,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:20,909 INFO L87 Difference]: Start difference. First operand 2848 states and 10032 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:21,996 INFO L93 Difference]: Finished difference Result 9218 states and 30019 transitions. [2021-06-05 16:40:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:40:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:21,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:22,010 INFO L225 Difference]: With dead ends: 9218 [2021-06-05 16:40:22,010 INFO L226 Difference]: Without dead ends: 9218 [2021-06-05 16:40:22,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:40:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-06-05 16:40:22,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 3024. [2021-06-05 16:40:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3023 states have (on average 3.595765795567317) internal successors, (10870), 3023 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 10870 transitions. [2021-06-05 16:40:22,085 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 10870 transitions. Word has length 28 [2021-06-05 16:40:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:22,085 INFO L482 AbstractCegarLoop]: Abstraction has 3024 states and 10870 transitions. [2021-06-05 16:40:22,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 10870 transitions. [2021-06-05 16:40:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:22,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:22,089 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:22,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3977 [2021-06-05 16:40:22,289 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:22,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:22,289 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-05 16:40:22,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:22,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931576354] [2021-06-05 16:40:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:22,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:22,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931576354] [2021-06-05 16:40:22,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931576354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:22,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107772328] [2021-06-05 16:40:22,325 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:40:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:22,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107772328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:22,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:22,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:40:22,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432211140] [2021-06-05 16:40:22,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:22,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:22,449 INFO L87 Difference]: Start difference. First operand 3024 states and 10870 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:23,471 INFO L93 Difference]: Finished difference Result 9047 states and 29554 transitions. [2021-06-05 16:40:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:40:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:23,485 INFO L225 Difference]: With dead ends: 9047 [2021-06-05 16:40:23,486 INFO L226 Difference]: Without dead ends: 9047 [2021-06-05 16:40:23,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:40:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9047 states. [2021-06-05 16:40:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 2996. [2021-06-05 16:40:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2995 states have (on average 3.579632721202003) internal successors, (10721), 2995 states have internal predecessors, (10721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 10721 transitions. [2021-06-05 16:40:23,592 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 10721 transitions. Word has length 28 [2021-06-05 16:40:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:23,592 INFO L482 AbstractCegarLoop]: Abstraction has 2996 states and 10721 transitions. [2021-06-05 16:40:23,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 10721 transitions. [2021-06-05 16:40:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:23,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:23,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:23,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3978,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:23,796 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-05 16:40:23,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:23,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728199528] [2021-06-05 16:40:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:23,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:23,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728199528] [2021-06-05 16:40:23,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728199528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:23,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916207704] [2021-06-05 16:40:23,831 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:23,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:23,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:23,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916207704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:23,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:23,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:40:23,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794493556] [2021-06-05 16:40:23,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:23,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:23,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:23,943 INFO L87 Difference]: Start difference. First operand 2996 states and 10721 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:24,942 INFO L93 Difference]: Finished difference Result 8494 states and 26829 transitions. [2021-06-05 16:40:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:40:24,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-05 16:40:24,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:24,955 INFO L225 Difference]: With dead ends: 8494 [2021-06-05 16:40:24,956 INFO L226 Difference]: Without dead ends: 8494 [2021-06-05 16:40:24,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:40:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2021-06-05 16:40:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 3016. [2021-06-05 16:40:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3016 states, 3015 states have (on average 3.5830845771144277) internal successors, (10803), 3015 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 10803 transitions. [2021-06-05 16:40:25,035 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 10803 transitions. Word has length 28 [2021-06-05 16:40:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:25,036 INFO L482 AbstractCegarLoop]: Abstraction has 3016 states and 10803 transitions. [2021-06-05 16:40:25,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 10803 transitions. [2021-06-05 16:40:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:25,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:25,040 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:25,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3979 [2021-06-05 16:40:25,240 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-05 16:40:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:25,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827156113] [2021-06-05 16:40:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:25,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827156113] [2021-06-05 16:40:25,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827156113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66304993] [2021-06-05 16:40:25,281 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:25,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:40:25,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:25,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:25,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:25,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66304993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:25,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:25,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:40:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674372294] [2021-06-05 16:40:25,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:25,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:25,389 INFO L87 Difference]: Start difference. First operand 3016 states and 10803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:26,343 INFO L93 Difference]: Finished difference Result 8003 states and 25641 transitions. [2021-06-05 16:40:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:40:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-05 16:40:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:26,356 INFO L225 Difference]: With dead ends: 8003 [2021-06-05 16:40:26,356 INFO L226 Difference]: Without dead ends: 7995 [2021-06-05 16:40:26,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:40:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-05 16:40:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 2998. [2021-06-05 16:40:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2997 states have (on average 3.578912245578912) internal successors, (10726), 2997 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 10726 transitions. [2021-06-05 16:40:26,439 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 10726 transitions. Word has length 28 [2021-06-05 16:40:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:26,440 INFO L482 AbstractCegarLoop]: Abstraction has 2998 states and 10726 transitions. [2021-06-05 16:40:26,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 10726 transitions. [2021-06-05 16:40:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:26,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:26,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:26,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-06-05 16:40:26,644 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:26,644 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-05 16:40:26,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:26,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883733088] [2021-06-05 16:40:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:26,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:26,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883733088] [2021-06-05 16:40:26,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883733088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:26,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179422862] [2021-06-05 16:40:26,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:26,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:40:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:26,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179422862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:26,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:26,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:40:26,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715553281] [2021-06-05 16:40:26,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:26,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:26,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:26,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:26,804 INFO L87 Difference]: Start difference. First operand 2998 states and 10726 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:27,824 INFO L93 Difference]: Finished difference Result 7921 states and 25395 transitions. [2021-06-05 16:40:27,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:40:27,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 16:40:27,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:27,836 INFO L225 Difference]: With dead ends: 7921 [2021-06-05 16:40:27,836 INFO L226 Difference]: Without dead ends: 7921 [2021-06-05 16:40:27,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:40:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-06-05 16:40:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 3014. [2021-06-05 16:40:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3014 states, 3013 states have (on average 3.5811483571191505) internal successors, (10790), 3013 states have internal predecessors, (10790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3014 states to 3014 states and 10790 transitions. [2021-06-05 16:40:27,908 INFO L78 Accepts]: Start accepts. Automaton has 3014 states and 10790 transitions. Word has length 28 [2021-06-05 16:40:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:27,908 INFO L482 AbstractCegarLoop]: Abstraction has 3014 states and 10790 transitions. [2021-06-05 16:40:27,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3014 states and 10790 transitions. [2021-06-05 16:40:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:27,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:27,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:28,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:28,113 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:28,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-05 16:40:28,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:28,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631806776] [2021-06-05 16:40:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:28,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631806776] [2021-06-05 16:40:28,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631806776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149178689] [2021-06-05 16:40:28,157 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:28,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:28,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:28,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149178689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:28,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:28,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:40:28,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435066485] [2021-06-05 16:40:28,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:28,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:28,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:28,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:28,273 INFO L87 Difference]: Start difference. First operand 3014 states and 10790 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:29,229 INFO L93 Difference]: Finished difference Result 7589 states and 24611 transitions. [2021-06-05 16:40:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:40:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 16:40:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:29,241 INFO L225 Difference]: With dead ends: 7589 [2021-06-05 16:40:29,241 INFO L226 Difference]: Without dead ends: 7581 [2021-06-05 16:40:29,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:40:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2021-06-05 16:40:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 2771. [2021-06-05 16:40:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 3.4974729241877256) internal successors, (9688), 2770 states have internal predecessors, (9688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 9688 transitions. [2021-06-05 16:40:29,309 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 9688 transitions. Word has length 28 [2021-06-05 16:40:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:29,309 INFO L482 AbstractCegarLoop]: Abstraction has 2771 states and 9688 transitions. [2021-06-05 16:40:29,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 9688 transitions. [2021-06-05 16:40:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:29,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:29,331 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:29,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3982 [2021-06-05 16:40:29,532 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-05 16:40:29,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:29,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62757804] [2021-06-05 16:40:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:29,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62757804] [2021-06-05 16:40:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62757804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615617824] [2021-06-05 16:40:29,569 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:29,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:29,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:29,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:29,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:29,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615617824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:29,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:29,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:40:29,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109421503] [2021-06-05 16:40:29,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:29,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:29,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:29,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:29,693 INFO L87 Difference]: Start difference. First operand 2771 states and 9688 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:30,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:30,583 INFO L93 Difference]: Finished difference Result 5790 states and 18502 transitions. [2021-06-05 16:40:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:40:30,583 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 16:40:30,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:30,591 INFO L225 Difference]: With dead ends: 5790 [2021-06-05 16:40:30,591 INFO L226 Difference]: Without dead ends: 5790 [2021-06-05 16:40:30,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:40:30,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5790 states. [2021-06-05 16:40:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5790 to 2783. [2021-06-05 16:40:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.4960460100647017) internal successors, (9726), 2782 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 9726 transitions. [2021-06-05 16:40:30,642 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 9726 transitions. Word has length 28 [2021-06-05 16:40:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:30,642 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 9726 transitions. [2021-06-05 16:40:30,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:30,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 9726 transitions. [2021-06-05 16:40:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:30,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:30,645 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:30,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:30,846 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:30,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:30,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-05 16:40:30,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:30,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595339573] [2021-06-05 16:40:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:30,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:30,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595339573] [2021-06-05 16:40:30,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595339573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:30,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971221509] [2021-06-05 16:40:30,883 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:30,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:40:30,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:31,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971221509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:31,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:31,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:40:31,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531590231] [2021-06-05 16:40:31,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:31,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:31,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:31,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:31,019 INFO L87 Difference]: Start difference. First operand 2783 states and 9726 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) [2021-06-05 16:40:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:32,185 INFO L93 Difference]: Finished difference Result 6569 states and 20497 transitions. [2021-06-05 16:40:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:40:32,185 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 28 [2021-06-05 16:40:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:32,194 INFO L225 Difference]: With dead ends: 6569 [2021-06-05 16:40:32,194 INFO L226 Difference]: Without dead ends: 6569 [2021-06-05 16:40:32,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 710.0ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:40:32,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2021-06-05 16:40:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 2849. [2021-06-05 16:40:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.4912219101123596) internal successors, (9943), 2848 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 9943 transitions. [2021-06-05 16:40:32,256 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 9943 transitions. Word has length 28 [2021-06-05 16:40:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:32,256 INFO L482 AbstractCegarLoop]: Abstraction has 2849 states and 9943 transitions. [2021-06-05 16:40:32,256 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) [2021-06-05 16:40:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 9943 transitions. [2021-06-05 16:40:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:32,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:32,260 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:32,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:32,460 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:32,460 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-05 16:40:32,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:32,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213544343] [2021-06-05 16:40:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:32,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:32,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213544343] [2021-06-05 16:40:32,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213544343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:32,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734011624] [2021-06-05 16:40:32,497 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:32,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:32,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:32,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:32,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:32,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734011624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:32,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:32,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:40:32,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309506970] [2021-06-05 16:40:32,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:32,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:32,625 INFO L87 Difference]: Start difference. First operand 2849 states and 9943 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) [2021-06-05 16:40:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:33,665 INFO L93 Difference]: Finished difference Result 6132 states and 19351 transitions. [2021-06-05 16:40:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:40:33,666 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 28 [2021-06-05 16:40:33,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:33,674 INFO L225 Difference]: With dead ends: 6132 [2021-06-05 16:40:33,674 INFO L226 Difference]: Without dead ends: 6128 [2021-06-05 16:40:33,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:40:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-05 16:40:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 2775. [2021-06-05 16:40:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4870223503965394) internal successors, (9673), 2774 states have internal predecessors, (9673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9673 transitions. [2021-06-05 16:40:33,729 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9673 transitions. Word has length 28 [2021-06-05 16:40:33,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:33,729 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9673 transitions. [2021-06-05 16:40:33,729 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) [2021-06-05 16:40:33,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9673 transitions. [2021-06-05 16:40:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:33,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:33,732 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:33,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:33,933 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 66 times [2021-06-05 16:40:33,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:33,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680660585] [2021-06-05 16:40:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:33,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680660585] [2021-06-05 16:40:33,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680660585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627025229] [2021-06-05 16:40:33,977 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:34,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:40:34,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:34,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:34,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:34,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627025229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:34,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:34,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:40:34,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066413606] [2021-06-05 16:40:34,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:34,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:34,082 INFO L87 Difference]: Start difference. First operand 2775 states and 9673 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:34,692 INFO L93 Difference]: Finished difference Result 5268 states and 16907 transitions. [2021-06-05 16:40:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:40:34,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:34,703 INFO L225 Difference]: With dead ends: 5268 [2021-06-05 16:40:34,703 INFO L226 Difference]: Without dead ends: 5268 [2021-06-05 16:40:34,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:40:34,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2021-06-05 16:40:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 2775. [2021-06-05 16:40:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.4891852919971162) internal successors, (9679), 2774 states have internal predecessors, (9679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 9679 transitions. [2021-06-05 16:40:34,760 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 9679 transitions. Word has length 28 [2021-06-05 16:40:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:34,760 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 9679 transitions. [2021-06-05 16:40:34,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 9679 transitions. [2021-06-05 16:40:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:34,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:34,764 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:34,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:34,964 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:34,965 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 67 times [2021-06-05 16:40:34,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:34,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068270705] [2021-06-05 16:40:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:35,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:35,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068270705] [2021-06-05 16:40:35,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068270705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:35,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295285519] [2021-06-05 16:40:35,009 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:35,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:35,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295285519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:35,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:35,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:40:35,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004637254] [2021-06-05 16:40:35,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:35,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:35,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:35,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:35,113 INFO L87 Difference]: Start difference. First operand 2775 states and 9679 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:35,922 INFO L93 Difference]: Finished difference Result 5584 states and 17812 transitions. [2021-06-05 16:40:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:40:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:35,930 INFO L225 Difference]: With dead ends: 5584 [2021-06-05 16:40:35,930 INFO L226 Difference]: Without dead ends: 5584 [2021-06-05 16:40:35,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:40:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-06-05 16:40:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 2766. [2021-06-05 16:40:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 3.489330922242315) internal successors, (9648), 2765 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 9648 transitions. [2021-06-05 16:40:35,982 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 9648 transitions. Word has length 28 [2021-06-05 16:40:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:35,982 INFO L482 AbstractCegarLoop]: Abstraction has 2766 states and 9648 transitions. [2021-06-05 16:40:35,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 9648 transitions. [2021-06-05 16:40:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:35,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:35,985 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:36,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3987 [2021-06-05 16:40:36,185 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:36,186 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 68 times [2021-06-05 16:40:36,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:36,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630570340] [2021-06-05 16:40:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:36,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630570340] [2021-06-05 16:40:36,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630570340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:36,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751508559] [2021-06-05 16:40:36,228 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:36,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:36,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:36,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751508559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:36,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:36,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:40:36,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798892334] [2021-06-05 16:40:36,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:36,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:36,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:36,331 INFO L87 Difference]: Start difference. First operand 2766 states and 9648 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:37,238 INFO L93 Difference]: Finished difference Result 6079 states and 19142 transitions. [2021-06-05 16:40:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:40:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:37,247 INFO L225 Difference]: With dead ends: 6079 [2021-06-05 16:40:37,247 INFO L226 Difference]: Without dead ends: 6079 [2021-06-05 16:40:37,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:40:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2021-06-05 16:40:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 2826. [2021-06-05 16:40:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2825 states have (on average 3.485309734513274) internal successors, (9846), 2825 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 9846 transitions. [2021-06-05 16:40:37,307 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 9846 transitions. Word has length 28 [2021-06-05 16:40:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:37,307 INFO L482 AbstractCegarLoop]: Abstraction has 2826 states and 9846 transitions. [2021-06-05 16:40:37,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 9846 transitions. [2021-06-05 16:40:37,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:37,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:37,311 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:37,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:37,511 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:37,511 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 69 times [2021-06-05 16:40:37,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:37,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326058631] [2021-06-05 16:40:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:37,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:37,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326058631] [2021-06-05 16:40:37,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326058631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:37,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947724521] [2021-06-05 16:40:37,566 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:37,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:40:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:37,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:37,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947724521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:37,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:37,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:40:37,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966732266] [2021-06-05 16:40:37,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:37,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:37,688 INFO L87 Difference]: Start difference. First operand 2826 states and 9846 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:38,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:38,278 INFO L93 Difference]: Finished difference Result 6807 states and 22904 transitions. [2021-06-05 16:40:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:40:38,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:38,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:38,289 INFO L225 Difference]: With dead ends: 6807 [2021-06-05 16:40:38,289 INFO L226 Difference]: Without dead ends: 6807 [2021-06-05 16:40:38,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:40:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2021-06-05 16:40:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 4024. [2021-06-05 16:40:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4023 states have (on average 3.6109868257519264) internal successors, (14527), 4023 states have internal predecessors, (14527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 14527 transitions. [2021-06-05 16:40:38,368 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 14527 transitions. Word has length 28 [2021-06-05 16:40:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:38,368 INFO L482 AbstractCegarLoop]: Abstraction has 4024 states and 14527 transitions. [2021-06-05 16:40:38,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 14527 transitions. [2021-06-05 16:40:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:38,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:38,373 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:38,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-06-05 16:40:38,573 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:38,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:38,573 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 70 times [2021-06-05 16:40:38,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:38,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589190746] [2021-06-05 16:40:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:38,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589190746] [2021-06-05 16:40:38,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589190746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164626610] [2021-06-05 16:40:38,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:38,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:38,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:38,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:38,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:38,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164626610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:38,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:38,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:40:38,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118204689] [2021-06-05 16:40:38,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:38,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:38,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:38,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:38,717 INFO L87 Difference]: Start difference. First operand 4024 states and 14527 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:39,569 INFO L93 Difference]: Finished difference Result 7353 states and 24861 transitions. [2021-06-05 16:40:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:40:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:39,581 INFO L225 Difference]: With dead ends: 7353 [2021-06-05 16:40:39,581 INFO L226 Difference]: Without dead ends: 7349 [2021-06-05 16:40:39,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 503.5ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:40:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-06-05 16:40:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 3916. [2021-06-05 16:40:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 3.6206896551724137) internal successors, (14175), 3915 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 14175 transitions. [2021-06-05 16:40:39,660 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 14175 transitions. Word has length 28 [2021-06-05 16:40:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:39,660 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 14175 transitions. [2021-06-05 16:40:39,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 14175 transitions. [2021-06-05 16:40:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:39,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:39,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:39,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-06-05 16:40:39,866 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-05 16:40:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:39,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037308807] [2021-06-05 16:40:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:39,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037308807] [2021-06-05 16:40:39,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037308807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304809021] [2021-06-05 16:40:39,895 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:39,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:40:39,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:40,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304809021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:40,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:40,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:40:40,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295991826] [2021-06-05 16:40:40,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:40,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:40,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:40,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:40,008 INFO L87 Difference]: Start difference. First operand 3916 states and 14175 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:40,879 INFO L93 Difference]: Finished difference Result 8141 states and 27286 transitions. [2021-06-05 16:40:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:40:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:40:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:40,893 INFO L225 Difference]: With dead ends: 8141 [2021-06-05 16:40:40,893 INFO L226 Difference]: Without dead ends: 8132 [2021-06-05 16:40:40,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:40:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-05 16:40:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 4360. [2021-06-05 16:40:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 4359 states have (on average 3.7118605184675384) internal successors, (16180), 4359 states have internal predecessors, (16180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:40,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 16180 transitions. [2021-06-05 16:40:40,987 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 16180 transitions. Word has length 28 [2021-06-05 16:40:40,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:40,987 INFO L482 AbstractCegarLoop]: Abstraction has 4360 states and 16180 transitions. [2021-06-05 16:40:40,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:40,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 16180 transitions. [2021-06-05 16:40:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:40,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:40,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:41,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-06-05 16:40:41,193 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:41,193 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-05 16:40:41,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:41,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084313486] [2021-06-05 16:40:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:41,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:41,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:41,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084313486] [2021-06-05 16:40:41,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084313486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:41,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526274781] [2021-06-05 16:40:41,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:41,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:40:41,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:41,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526274781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:41,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:41,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:40:41,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865461900] [2021-06-05 16:40:41,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:41,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:41,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:41,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:41,374 INFO L87 Difference]: Start difference. First operand 4360 states and 16180 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:42,231 INFO L93 Difference]: Finished difference Result 8418 states and 28143 transitions. [2021-06-05 16:40:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:40:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:40:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:42,244 INFO L225 Difference]: With dead ends: 8418 [2021-06-05 16:40:42,244 INFO L226 Difference]: Without dead ends: 8418 [2021-06-05 16:40:42,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:40:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-06-05 16:40:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 4380. [2021-06-05 16:40:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.69901804064855) internal successors, (16198), 4379 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 16198 transitions. [2021-06-05 16:40:42,336 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 16198 transitions. Word has length 28 [2021-06-05 16:40:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:42,336 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 16198 transitions. [2021-06-05 16:40:42,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 16198 transitions. [2021-06-05 16:40:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:42,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:42,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:42,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:42,542 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-05 16:40:42,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:42,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166992336] [2021-06-05 16:40:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:42,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:42,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166992336] [2021-06-05 16:40:42,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166992336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:42,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646567837] [2021-06-05 16:40:42,576 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:42,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:42,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:42,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646567837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:42,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:42,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:40:42,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646947592] [2021-06-05 16:40:42,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:40:42,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:42,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:40:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:40:42,669 INFO L87 Difference]: Start difference. First operand 4380 states and 16198 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) [2021-06-05 16:40:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:43,131 INFO L93 Difference]: Finished difference Result 7845 states and 27662 transitions. [2021-06-05 16:40:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:40:43,132 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 28 [2021-06-05 16:40:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:43,143 INFO L225 Difference]: With dead ends: 7845 [2021-06-05 16:40:43,144 INFO L226 Difference]: Without dead ends: 7762 [2021-06-05 16:40:43,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:40:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-06-05 16:40:43,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 5838. [2021-06-05 16:40:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 3.7627205756381703) internal successors, (21963), 5837 states have internal predecessors, (21963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 21963 transitions. [2021-06-05 16:40:43,239 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 21963 transitions. Word has length 28 [2021-06-05 16:40:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:43,239 INFO L482 AbstractCegarLoop]: Abstraction has 5838 states and 21963 transitions. [2021-06-05 16:40:43,239 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) [2021-06-05 16:40:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 21963 transitions. [2021-06-05 16:40:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:43,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:43,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:43,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:43,448 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:43,448 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-05 16:40:43,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:43,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233300271] [2021-06-05 16:40:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:43,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:43,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233300271] [2021-06-05 16:40:43,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233300271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:43,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142533138] [2021-06-05 16:40:43,476 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:43,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:43,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:43,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:40:43,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:43,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142533138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:43,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:43,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:40:43,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327314216] [2021-06-05 16:40:43,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:40:43,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:43,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:40:43,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:40:43,557 INFO L87 Difference]: Start difference. First operand 5838 states and 21963 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:43,739 INFO L93 Difference]: Finished difference Result 8103 states and 28515 transitions. [2021-06-05 16:40:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:40:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:43,752 INFO L225 Difference]: With dead ends: 8103 [2021-06-05 16:40:43,752 INFO L226 Difference]: Without dead ends: 8103 [2021-06-05 16:40:43,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:40:43,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2021-06-05 16:40:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5980. [2021-06-05 16:40:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5979 states have (on average 3.7395885599598597) internal successors, (22359), 5979 states have internal predecessors, (22359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 22359 transitions. [2021-06-05 16:40:43,852 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 22359 transitions. Word has length 28 [2021-06-05 16:40:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:43,853 INFO L482 AbstractCegarLoop]: Abstraction has 5980 states and 22359 transitions. [2021-06-05 16:40:43,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 22359 transitions. [2021-06-05 16:40:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:43,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:43,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:44,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:44,061 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-05 16:40:44,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:44,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908984201] [2021-06-05 16:40:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:44,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908984201] [2021-06-05 16:40:44,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908984201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:44,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212160076] [2021-06-05 16:40:44,104 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:44,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:40:44,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:44,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:44,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212160076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:44,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:44,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:40:44,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484102041] [2021-06-05 16:40:44,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:44,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:44,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:44,199 INFO L87 Difference]: Start difference. First operand 5980 states and 22359 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) [2021-06-05 16:40:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:44,958 INFO L93 Difference]: Finished difference Result 12480 states and 43435 transitions. [2021-06-05 16:40:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:40:44,959 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 28 [2021-06-05 16:40:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:44,982 INFO L225 Difference]: With dead ends: 12480 [2021-06-05 16:40:44,982 INFO L226 Difference]: Without dead ends: 12480 [2021-06-05 16:40:44,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:40:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12480 states. [2021-06-05 16:40:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12480 to 6653. [2021-06-05 16:40:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6652 states have (on average 3.753607937462417) internal successors, (24969), 6652 states have internal predecessors, (24969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 24969 transitions. [2021-06-05 16:40:45,140 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 24969 transitions. Word has length 28 [2021-06-05 16:40:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:45,140 INFO L482 AbstractCegarLoop]: Abstraction has 6653 states and 24969 transitions. [2021-06-05 16:40:45,141 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) [2021-06-05 16:40:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 24969 transitions. [2021-06-05 16:40:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:45,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:45,150 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:45,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:45,351 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-05 16:40:45,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:45,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439673014] [2021-06-05 16:40:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:45,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:45,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439673014] [2021-06-05 16:40:45,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439673014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:45,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782973064] [2021-06-05 16:40:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:45,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:45,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:45,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:45,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782973064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:45,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:45,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:40:45,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19358848] [2021-06-05 16:40:45,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:40:45,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:45,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:40:45,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:40:45,477 INFO L87 Difference]: Start difference. First operand 6653 states and 24969 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:46,180 INFO L93 Difference]: Finished difference Result 12633 states and 43998 transitions. [2021-06-05 16:40:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:40:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:46,203 INFO L225 Difference]: With dead ends: 12633 [2021-06-05 16:40:46,203 INFO L226 Difference]: Without dead ends: 12633 [2021-06-05 16:40:46,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:40:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12633 states. [2021-06-05 16:40:46,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12633 to 6881. [2021-06-05 16:40:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6881 states, 6880 states have (on average 3.734156976744186) internal successors, (25691), 6880 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6881 states to 6881 states and 25691 transitions. [2021-06-05 16:40:46,391 INFO L78 Accepts]: Start accepts. Automaton has 6881 states and 25691 transitions. Word has length 28 [2021-06-05 16:40:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:46,391 INFO L482 AbstractCegarLoop]: Abstraction has 6881 states and 25691 transitions. [2021-06-05 16:40:46,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:46,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6881 states and 25691 transitions. [2021-06-05 16:40:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:46,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:46,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:46,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-06-05 16:40:46,602 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-05 16:40:46,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:46,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684866562] [2021-06-05 16:40:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:46,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:46,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684866562] [2021-06-05 16:40:46,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684866562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:46,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987755335] [2021-06-05 16:40:46,631 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:46,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:40:46,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:46,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:46,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:46,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987755335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:46,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:46,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:40:46,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181155802] [2021-06-05 16:40:46,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:40:46,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:46,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:40:46,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:40:46,719 INFO L87 Difference]: Start difference. First operand 6881 states and 25691 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:47,128 INFO L93 Difference]: Finished difference Result 9357 states and 33618 transitions. [2021-06-05 16:40:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:40:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:47,145 INFO L225 Difference]: With dead ends: 9357 [2021-06-05 16:40:47,145 INFO L226 Difference]: Without dead ends: 9327 [2021-06-05 16:40:47,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:40:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-06-05 16:40:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 7728. [2021-06-05 16:40:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7728 states, 7727 states have (on average 3.760450368836547) internal successors, (29057), 7727 states have internal predecessors, (29057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7728 states to 7728 states and 29057 transitions. [2021-06-05 16:40:47,287 INFO L78 Accepts]: Start accepts. Automaton has 7728 states and 29057 transitions. Word has length 28 [2021-06-05 16:40:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:47,287 INFO L482 AbstractCegarLoop]: Abstraction has 7728 states and 29057 transitions. [2021-06-05 16:40:47,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 7728 states and 29057 transitions. [2021-06-05 16:40:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:47,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:47,299 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:47,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:47,499 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:47,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-05 16:40:47,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:47,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774109024] [2021-06-05 16:40:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:47,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:47,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774109024] [2021-06-05 16:40:47,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774109024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:47,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718740216] [2021-06-05 16:40:47,529 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:47,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:40:47,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:47,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:47,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718740216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:47,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:47,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:40:47,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363621502] [2021-06-05 16:40:47,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:40:47,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:40:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:40:47,644 INFO L87 Difference]: Start difference. First operand 7728 states and 29057 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:48,039 INFO L93 Difference]: Finished difference Result 9961 states and 35609 transitions. [2021-06-05 16:40:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:40:48,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:48,058 INFO L225 Difference]: With dead ends: 9961 [2021-06-05 16:40:48,058 INFO L226 Difference]: Without dead ends: 9961 [2021-06-05 16:40:48,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:40:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-05 16:40:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7768. [2021-06-05 16:40:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7768 states, 7767 states have (on average 3.756405304493369) internal successors, (29176), 7767 states have internal predecessors, (29176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7768 states to 7768 states and 29176 transitions. [2021-06-05 16:40:48,207 INFO L78 Accepts]: Start accepts. Automaton has 7768 states and 29176 transitions. Word has length 28 [2021-06-05 16:40:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:48,207 INFO L482 AbstractCegarLoop]: Abstraction has 7768 states and 29176 transitions. [2021-06-05 16:40:48,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 7768 states and 29176 transitions. [2021-06-05 16:40:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:48,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:48,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:48,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3998 [2021-06-05 16:40:48,419 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-05 16:40:48,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:48,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903991333] [2021-06-05 16:40:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:48,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:48,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903991333] [2021-06-05 16:40:48,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903991333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:48,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207867385] [2021-06-05 16:40:48,468 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:48,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:48,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:48,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207867385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:48,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:48,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:40:48,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669506464] [2021-06-05 16:40:48,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:40:48,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:48,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:40:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:40:48,554 INFO L87 Difference]: Start difference. First operand 7768 states and 29176 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:49,182 INFO L93 Difference]: Finished difference Result 13358 states and 47391 transitions. [2021-06-05 16:40:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:40:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:49,207 INFO L225 Difference]: With dead ends: 13358 [2021-06-05 16:40:49,207 INFO L226 Difference]: Without dead ends: 13354 [2021-06-05 16:40:49,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:40:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13354 states. [2021-06-05 16:40:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13354 to 7674. [2021-06-05 16:40:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7674 states, 7673 states have (on average 3.760328424345106) internal successors, (28853), 7673 states have internal predecessors, (28853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7674 states to 7674 states and 28853 transitions. [2021-06-05 16:40:49,409 INFO L78 Accepts]: Start accepts. Automaton has 7674 states and 28853 transitions. Word has length 28 [2021-06-05 16:40:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:49,410 INFO L482 AbstractCegarLoop]: Abstraction has 7674 states and 28853 transitions. [2021-06-05 16:40:49,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7674 states and 28853 transitions. [2021-06-05 16:40:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:49,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:49,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:49,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3999,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:49,621 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-05 16:40:49,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:49,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096941692] [2021-06-05 16:40:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:49,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:49,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096941692] [2021-06-05 16:40:49,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096941692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:49,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510472243] [2021-06-05 16:40:49,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:49,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:49,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:49,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:49,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510472243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:49,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:49,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:40:49,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839088575] [2021-06-05 16:40:49,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:40:49,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:49,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:40:49,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:40:49,747 INFO L87 Difference]: Start difference. First operand 7674 states and 28853 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) [2021-06-05 16:40:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:50,191 INFO L93 Difference]: Finished difference Result 10180 states and 36418 transitions. [2021-06-05 16:40:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:40:50,191 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 28 [2021-06-05 16:40:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:50,210 INFO L225 Difference]: With dead ends: 10180 [2021-06-05 16:40:50,210 INFO L226 Difference]: Without dead ends: 10180 [2021-06-05 16:40:50,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:40:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10180 states. [2021-06-05 16:40:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10180 to 7620. [2021-06-05 16:40:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7531172069825436) internal successors, (28595), 7619 states have internal predecessors, (28595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28595 transitions. [2021-06-05 16:40:50,360 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28595 transitions. Word has length 28 [2021-06-05 16:40:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:50,360 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28595 transitions. [2021-06-05 16:40:50,361 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) [2021-06-05 16:40:50,361 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28595 transitions. [2021-06-05 16:40:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:50,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:50,423 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:50,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-05 16:40:50,623 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-05 16:40:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:50,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635683736] [2021-06-05 16:40:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:50,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:50,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635683736] [2021-06-05 16:40:50,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635683736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:50,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203386368] [2021-06-05 16:40:50,670 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:50,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:40:50,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:50,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:50,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203386368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:50,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:50,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:40:50,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638644398] [2021-06-05 16:40:50,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:50,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:50,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:50,764 INFO L87 Difference]: Start difference. First operand 7620 states and 28595 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) [2021-06-05 16:40:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:51,499 INFO L93 Difference]: Finished difference Result 13241 states and 46888 transitions. [2021-06-05 16:40:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:40:51,500 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 28 [2021-06-05 16:40:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:51,523 INFO L225 Difference]: With dead ends: 13241 [2021-06-05 16:40:51,523 INFO L226 Difference]: Without dead ends: 13229 [2021-06-05 16:40:51,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 413.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:40:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2021-06-05 16:40:51,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 7620. [2021-06-05 16:40:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7620 states, 7619 states have (on average 3.7520672004200026) internal successors, (28587), 7619 states have internal predecessors, (28587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7620 states to 7620 states and 28587 transitions. [2021-06-05 16:40:51,688 INFO L78 Accepts]: Start accepts. Automaton has 7620 states and 28587 transitions. Word has length 28 [2021-06-05 16:40:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:51,688 INFO L482 AbstractCegarLoop]: Abstraction has 7620 states and 28587 transitions. [2021-06-05 16:40:51,688 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) [2021-06-05 16:40:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 7620 states and 28587 transitions. [2021-06-05 16:40:51,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:51,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:51,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:51,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-06-05 16:40:51,899 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-05 16:40:51,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:51,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525247570] [2021-06-05 16:40:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:51,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:51,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525247570] [2021-06-05 16:40:51,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525247570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:51,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116932734] [2021-06-05 16:40:51,942 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:51,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:51,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:51,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:51,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:52,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116932734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:52,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:52,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:40:52,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498139700] [2021-06-05 16:40:52,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:52,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:52,046 INFO L87 Difference]: Start difference. First operand 7620 states and 28587 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:53,254 INFO L93 Difference]: Finished difference Result 20083 states and 70057 transitions. [2021-06-05 16:40:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:40:53,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:40:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:53,291 INFO L225 Difference]: With dead ends: 20083 [2021-06-05 16:40:53,291 INFO L226 Difference]: Without dead ends: 20083 [2021-06-05 16:40:53,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:40:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20083 states. [2021-06-05 16:40:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20083 to 10419. [2021-06-05 16:40:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10419 states, 10418 states have (on average 3.7977538875023997) internal successors, (39565), 10418 states have internal predecessors, (39565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10419 states to 10419 states and 39565 transitions. [2021-06-05 16:40:53,577 INFO L78 Accepts]: Start accepts. Automaton has 10419 states and 39565 transitions. Word has length 28 [2021-06-05 16:40:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:53,577 INFO L482 AbstractCegarLoop]: Abstraction has 10419 states and 39565 transitions. [2021-06-05 16:40:53,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 10419 states and 39565 transitions. [2021-06-05 16:40:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:53,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:53,593 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:53,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-06-05 16:40:53,793 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:53,794 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-05 16:40:53,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:53,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100319639] [2021-06-05 16:40:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:53,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100319639] [2021-06-05 16:40:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100319639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586032506] [2021-06-05 16:40:53,835 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:53,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:40:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:53,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586032506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:53,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:53,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:40:53,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431799466] [2021-06-05 16:40:53,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:53,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:53,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:53,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:53,931 INFO L87 Difference]: Start difference. First operand 10419 states and 39565 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:55,060 INFO L93 Difference]: Finished difference Result 19333 states and 68102 transitions. [2021-06-05 16:40:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:40:55,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:40:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:55,095 INFO L225 Difference]: With dead ends: 19333 [2021-06-05 16:40:55,095 INFO L226 Difference]: Without dead ends: 19321 [2021-06-05 16:40:55,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 634.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:40:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19321 states. [2021-06-05 16:40:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19321 to 10233. [2021-06-05 16:40:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10233 states, 10232 states have (on average 3.8045347928068804) internal successors, (38928), 10232 states have internal predecessors, (38928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10233 states to 10233 states and 38928 transitions. [2021-06-05 16:40:55,365 INFO L78 Accepts]: Start accepts. Automaton has 10233 states and 38928 transitions. Word has length 28 [2021-06-05 16:40:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:55,365 INFO L482 AbstractCegarLoop]: Abstraction has 10233 states and 38928 transitions. [2021-06-05 16:40:55,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 10233 states and 38928 transitions. [2021-06-05 16:40:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:55,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:55,380 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:55,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:55,581 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-05 16:40:55,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:55,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328208679] [2021-06-05 16:40:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:55,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:55,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328208679] [2021-06-05 16:40:55,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328208679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:55,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435918938] [2021-06-05 16:40:55,624 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:55,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:40:55,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:55,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435918938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:55,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:55,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:40:55,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513040953] [2021-06-05 16:40:55,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:55,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:55,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:55,718 INFO L87 Difference]: Start difference. First operand 10233 states and 38928 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:56,757 INFO L93 Difference]: Finished difference Result 19147 states and 67441 transitions. [2021-06-05 16:40:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:40:56,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:40:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:56,792 INFO L225 Difference]: With dead ends: 19147 [2021-06-05 16:40:56,792 INFO L226 Difference]: Without dead ends: 19111 [2021-06-05 16:40:56,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:40:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19111 states. [2021-06-05 16:40:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19111 to 10277. [2021-06-05 16:40:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.802646944336318) internal successors, (39076), 10276 states have internal predecessors, (39076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39076 transitions. [2021-06-05 16:40:57,055 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39076 transitions. Word has length 28 [2021-06-05 16:40:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:57,055 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 39076 transitions. [2021-06-05 16:40:57,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39076 transitions. [2021-06-05 16:40:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:57,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:57,071 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:57,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:57,273 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:57,273 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-05 16:40:57,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:57,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563340561] [2021-06-05 16:40:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:57,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:57,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563340561] [2021-06-05 16:40:57,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563340561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:57,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634469111] [2021-06-05 16:40:57,316 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:57,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:57,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:57,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634469111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:57,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:57,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:40:57,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845963498] [2021-06-05 16:40:57,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:57,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:57,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:57,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:57,439 INFO L87 Difference]: Start difference. First operand 10277 states and 39076 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) [2021-06-05 16:40:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:59,030 INFO L93 Difference]: Finished difference Result 19074 states and 67295 transitions. [2021-06-05 16:40:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:40:59,030 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 28 [2021-06-05 16:40:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:59,066 INFO L225 Difference]: With dead ends: 19074 [2021-06-05 16:40:59,066 INFO L226 Difference]: Without dead ends: 19074 [2021-06-05 16:40:59,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 1020.3ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:40:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19074 states. [2021-06-05 16:40:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19074 to 10473. [2021-06-05 16:40:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10473 states, 10472 states have (on average 3.793544690603514) internal successors, (39726), 10472 states have internal predecessors, (39726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10473 states to 10473 states and 39726 transitions. [2021-06-05 16:40:59,328 INFO L78 Accepts]: Start accepts. Automaton has 10473 states and 39726 transitions. Word has length 28 [2021-06-05 16:40:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:59,328 INFO L482 AbstractCegarLoop]: Abstraction has 10473 states and 39726 transitions. [2021-06-05 16:40:59,328 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) [2021-06-05 16:40:59,328 INFO L276 IsEmpty]: Start isEmpty. Operand 10473 states and 39726 transitions. [2021-06-05 16:40:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:59,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:59,343 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:59,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:59,544 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:59,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:59,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-05 16:40:59,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:59,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896529814] [2021-06-05 16:40:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:59,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:59,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896529814] [2021-06-05 16:40:59,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896529814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:59,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701893177] [2021-06-05 16:40:59,586 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:59,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:59,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:59,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701893177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:59,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:59,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:40:59,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685124921] [2021-06-05 16:40:59,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:59,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:59,700 INFO L87 Difference]: Start difference. First operand 10473 states and 39726 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) [2021-06-05 16:41:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:01,047 INFO L93 Difference]: Finished difference Result 18684 states and 66217 transitions. [2021-06-05 16:41:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:41:01,048 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 28 [2021-06-05 16:41:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:01,082 INFO L225 Difference]: With dead ends: 18684 [2021-06-05 16:41:01,082 INFO L226 Difference]: Without dead ends: 18672 [2021-06-05 16:41:01,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 785.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:41:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18672 states. [2021-06-05 16:41:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18672 to 10355. [2021-06-05 16:41:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10355 states, 10354 states have (on average 3.7980490631639947) internal successors, (39325), 10354 states have internal predecessors, (39325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 39325 transitions. [2021-06-05 16:41:01,342 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 39325 transitions. Word has length 28 [2021-06-05 16:41:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:01,343 INFO L482 AbstractCegarLoop]: Abstraction has 10355 states and 39325 transitions. [2021-06-05 16:41:01,343 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) [2021-06-05 16:41:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 39325 transitions. [2021-06-05 16:41:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:01,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:01,357 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:01,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4006 [2021-06-05 16:41:01,558 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-05 16:41:01,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:01,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944191757] [2021-06-05 16:41:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:01,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:01,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944191757] [2021-06-05 16:41:01,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944191757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:01,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58483134] [2021-06-05 16:41:01,601 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:01,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:41:01,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:01,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:01,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58483134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:01,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:01,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:41:01,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656516823] [2021-06-05 16:41:01,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:41:01,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:01,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:41:01,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:41:01,731 INFO L87 Difference]: Start difference. First operand 10355 states and 39325 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:02,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:02,909 INFO L93 Difference]: Finished difference Result 17924 states and 64133 transitions. [2021-06-05 16:41:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:41:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 16:41:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:02,942 INFO L225 Difference]: With dead ends: 17924 [2021-06-05 16:41:02,942 INFO L226 Difference]: Without dead ends: 17888 [2021-06-05 16:41:02,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 652.0ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:41:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17888 states. [2021-06-05 16:41:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17888 to 10379. [2021-06-05 16:41:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 3.7969743688571977) internal successors, (39405), 10378 states have internal predecessors, (39405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 39405 transitions. [2021-06-05 16:41:03,183 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 39405 transitions. Word has length 28 [2021-06-05 16:41:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:03,183 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 39405 transitions. [2021-06-05 16:41:03,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 39405 transitions. [2021-06-05 16:41:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:03,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:03,198 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:03,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:03,399 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:03,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-05 16:41:03,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:03,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122949405] [2021-06-05 16:41:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:03,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:03,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122949405] [2021-06-05 16:41:03,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122949405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:03,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226721869] [2021-06-05 16:41:03,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:03,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:41:03,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:03,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:03,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:03,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226721869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:03,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:03,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:41:03,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554709433] [2021-06-05 16:41:03,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:03,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:03,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:03,573 INFO L87 Difference]: Start difference. First operand 10379 states and 39405 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:04,981 INFO L93 Difference]: Finished difference Result 26041 states and 92685 transitions. [2021-06-05 16:41:04,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:41:04,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:04,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:05,037 INFO L225 Difference]: With dead ends: 26041 [2021-06-05 16:41:05,037 INFO L226 Difference]: Without dead ends: 26041 [2021-06-05 16:41:05,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:41:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26041 states. [2021-06-05 16:41:05,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26041 to 10669. [2021-06-05 16:41:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 3.8225534308211473) internal successors, (40779), 10668 states have internal predecessors, (40779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 40779 transitions. [2021-06-05 16:41:05,366 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 40779 transitions. Word has length 28 [2021-06-05 16:41:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:05,366 INFO L482 AbstractCegarLoop]: Abstraction has 10669 states and 40779 transitions. [2021-06-05 16:41:05,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 40779 transitions. [2021-06-05 16:41:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:05,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:05,382 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:05,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4008 [2021-06-05 16:41:05,582 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-05 16:41:05,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:05,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890578513] [2021-06-05 16:41:05,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:05,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:05,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890578513] [2021-06-05 16:41:05,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890578513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:05,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25950786] [2021-06-05 16:41:05,619 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:05,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:41:05,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:05,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:05,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25950786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:05,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:05,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:41:05,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931450604] [2021-06-05 16:41:05,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:05,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:05,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:05,751 INFO L87 Difference]: Start difference. First operand 10669 states and 40779 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:07,114 INFO L93 Difference]: Finished difference Result 25481 states and 91317 transitions. [2021-06-05 16:41:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:41:07,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:07,172 INFO L225 Difference]: With dead ends: 25481 [2021-06-05 16:41:07,172 INFO L226 Difference]: Without dead ends: 25481 [2021-06-05 16:41:07,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 802.0ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:41:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2021-06-05 16:41:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 10571. [2021-06-05 16:41:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.809744560075686) internal successors, (40269), 10570 states have internal predecessors, (40269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 40269 transitions. [2021-06-05 16:41:07,519 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 40269 transitions. Word has length 28 [2021-06-05 16:41:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:07,519 INFO L482 AbstractCegarLoop]: Abstraction has 10571 states and 40269 transitions. [2021-06-05 16:41:07,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:07,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 40269 transitions. [2021-06-05 16:41:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:07,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:07,535 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:07,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:07,735 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-05 16:41:07,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:07,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260653195] [2021-06-05 16:41:07,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:07,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260653195] [2021-06-05 16:41:07,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260653195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586091203] [2021-06-05 16:41:07,772 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:07,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:41:07,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:07,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:07,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:07,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586091203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:07,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:07,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:41:07,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012913732] [2021-06-05 16:41:07,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:41:07,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:07,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:41:07,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:41:07,904 INFO L87 Difference]: Start difference. First operand 10571 states and 40269 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:08,803 INFO L93 Difference]: Finished difference Result 20226 states and 72726 transitions. [2021-06-05 16:41:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:41:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:08,842 INFO L225 Difference]: With dead ends: 20226 [2021-06-05 16:41:08,842 INFO L226 Difference]: Without dead ends: 20226 [2021-06-05 16:41:08,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:41:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-06-05 16:41:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 10580. [2021-06-05 16:41:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 3.8086775687683145) internal successors, (40292), 10579 states have internal predecessors, (40292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 40292 transitions. [2021-06-05 16:41:09,156 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 40292 transitions. Word has length 28 [2021-06-05 16:41:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:09,156 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 40292 transitions. [2021-06-05 16:41:09,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 40292 transitions. [2021-06-05 16:41:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:09,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:09,171 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:09,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-05 16:41:09,372 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-05 16:41:09,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:09,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13801192] [2021-06-05 16:41:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:09,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:09,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13801192] [2021-06-05 16:41:09,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13801192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:09,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753599093] [2021-06-05 16:41:09,409 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:09,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:09,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:09,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753599093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:09,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:09,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:41:09,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053492057] [2021-06-05 16:41:09,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:41:09,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:09,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:41:09,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:41:09,534 INFO L87 Difference]: Start difference. First operand 10580 states and 40292 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:10,333 INFO L93 Difference]: Finished difference Result 18775 states and 68086 transitions. [2021-06-05 16:41:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:41:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 16:41:10,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:10,369 INFO L225 Difference]: With dead ends: 18775 [2021-06-05 16:41:10,369 INFO L226 Difference]: Without dead ends: 18775 [2021-06-05 16:41:10,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:41:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18775 states. [2021-06-05 16:41:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18775 to 10592. [2021-06-05 16:41:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.807950146350675) internal successors, (40330), 10591 states have internal predecessors, (40330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40330 transitions. [2021-06-05 16:41:10,622 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40330 transitions. Word has length 28 [2021-06-05 16:41:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:10,622 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40330 transitions. [2021-06-05 16:41:10,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40330 transitions. [2021-06-05 16:41:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:10,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:10,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:10,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-05 16:41:10,838 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-05 16:41:10,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:10,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899548962] [2021-06-05 16:41:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:10,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:10,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899548962] [2021-06-05 16:41:10,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899548962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:10,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419818835] [2021-06-05 16:41:10,875 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:10,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:10,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:10,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:10,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:11,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419818835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:11,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:11,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:41:11,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777539164] [2021-06-05 16:41:11,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:11,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:11,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:11,005 INFO L87 Difference]: Start difference. First operand 10592 states and 40330 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) [2021-06-05 16:41:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:12,176 INFO L93 Difference]: Finished difference Result 19382 states and 69829 transitions. [2021-06-05 16:41:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:41:12,176 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 28 [2021-06-05 16:41:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:12,213 INFO L225 Difference]: With dead ends: 19382 [2021-06-05 16:41:12,213 INFO L226 Difference]: Without dead ends: 19382 [2021-06-05 16:41:12,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 725.3ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:41:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19382 states. [2021-06-05 16:41:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19382 to 10700. [2021-06-05 16:41:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10699 states have (on average 3.800729040097205) internal successors, (40664), 10699 states have internal predecessors, (40664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 40664 transitions. [2021-06-05 16:41:12,498 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 40664 transitions. Word has length 28 [2021-06-05 16:41:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:12,498 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 40664 transitions. [2021-06-05 16:41:12,498 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) [2021-06-05 16:41:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 40664 transitions. [2021-06-05 16:41:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:12,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:12,515 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:12,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-06-05 16:41:12,715 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:12,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:12,716 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-05 16:41:12,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:12,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127804525] [2021-06-05 16:41:12,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:12,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127804525] [2021-06-05 16:41:12,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127804525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576178006] [2021-06-05 16:41:12,751 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:12,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:41:12,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:12,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:12,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576178006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:12,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:12,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:41:12,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322997196] [2021-06-05 16:41:12,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:12,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:12,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:12,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:12,876 INFO L87 Difference]: Start difference. First operand 10700 states and 40664 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) [2021-06-05 16:41:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:13,859 INFO L93 Difference]: Finished difference Result 18954 states and 68665 transitions. [2021-06-05 16:41:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:41:13,859 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 28 [2021-06-05 16:41:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:13,895 INFO L225 Difference]: With dead ends: 18954 [2021-06-05 16:41:13,895 INFO L226 Difference]: Without dead ends: 18950 [2021-06-05 16:41:13,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 604.4ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:41:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18950 states. [2021-06-05 16:41:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18950 to 10626. [2021-06-05 16:41:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10626 states, 10625 states have (on average 3.804705882352941) internal successors, (40425), 10625 states have internal predecessors, (40425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10626 states to 10626 states and 40425 transitions. [2021-06-05 16:41:14,196 INFO L78 Accepts]: Start accepts. Automaton has 10626 states and 40425 transitions. Word has length 28 [2021-06-05 16:41:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:14,196 INFO L482 AbstractCegarLoop]: Abstraction has 10626 states and 40425 transitions. [2021-06-05 16:41:14,196 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) [2021-06-05 16:41:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10626 states and 40425 transitions. [2021-06-05 16:41:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:14,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:14,212 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:14,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-05 16:41:14,412 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-05 16:41:14,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:14,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489515889] [2021-06-05 16:41:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:14,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:14,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489515889] [2021-06-05 16:41:14,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489515889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551914270] [2021-06-05 16:41:14,455 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:14,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:41:14,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:14,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:14,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551914270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:14,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:14,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:41:14,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142465872] [2021-06-05 16:41:14,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:14,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:14,577 INFO L87 Difference]: Start difference. First operand 10626 states and 40425 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:15,668 INFO L93 Difference]: Finished difference Result 18381 states and 66150 transitions. [2021-06-05 16:41:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:41:15,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 16:41:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:15,703 INFO L225 Difference]: With dead ends: 18381 [2021-06-05 16:41:15,703 INFO L226 Difference]: Without dead ends: 18381 [2021-06-05 16:41:15,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 694.1ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:41:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18381 states. [2021-06-05 16:41:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18381 to 10853. [2021-06-05 16:41:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10853 states, 10852 states have (on average 3.807869517139698) internal successors, (41323), 10852 states have internal predecessors, (41323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10853 states to 10853 states and 41323 transitions. [2021-06-05 16:41:15,957 INFO L78 Accepts]: Start accepts. Automaton has 10853 states and 41323 transitions. Word has length 28 [2021-06-05 16:41:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:15,957 INFO L482 AbstractCegarLoop]: Abstraction has 10853 states and 41323 transitions. [2021-06-05 16:41:15,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 10853 states and 41323 transitions. [2021-06-05 16:41:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:15,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:15,973 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:16,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:16,173 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:16,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-05 16:41:16,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:16,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830259771] [2021-06-05 16:41:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:16,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830259771] [2021-06-05 16:41:16,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830259771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405259210] [2021-06-05 16:41:16,216 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:16,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:41:16,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:16,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:16,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:16,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405259210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:16,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:16,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:41:16,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276921948] [2021-06-05 16:41:16,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:16,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:16,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:16,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:16,429 INFO L87 Difference]: Start difference. First operand 10853 states and 41323 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:17,506 INFO L93 Difference]: Finished difference Result 18091 states and 65344 transitions. [2021-06-05 16:41:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:41:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 16:41:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:17,543 INFO L225 Difference]: With dead ends: 18091 [2021-06-05 16:41:17,543 INFO L226 Difference]: Without dead ends: 18079 [2021-06-05 16:41:17,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:41:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18079 states. [2021-06-05 16:41:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18079 to 10955. [2021-06-05 16:41:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10955 states, 10954 states have (on average 3.8018988497352564) internal successors, (41646), 10954 states have internal predecessors, (41646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10955 states to 10955 states and 41646 transitions. [2021-06-05 16:41:17,795 INFO L78 Accepts]: Start accepts. Automaton has 10955 states and 41646 transitions. Word has length 28 [2021-06-05 16:41:17,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:17,795 INFO L482 AbstractCegarLoop]: Abstraction has 10955 states and 41646 transitions. [2021-06-05 16:41:17,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10955 states and 41646 transitions. [2021-06-05 16:41:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:17,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:17,810 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:18,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:18,011 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 71 times [2021-06-05 16:41:18,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:18,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042101487] [2021-06-05 16:41:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:18,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:18,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042101487] [2021-06-05 16:41:18,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042101487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:18,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603102125] [2021-06-05 16:41:18,054 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:18,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:41:18,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:18,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603102125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:18,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:18,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:41:18,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995696931] [2021-06-05 16:41:18,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:18,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:18,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:18,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:18,147 INFO L87 Difference]: Start difference. First operand 10955 states and 41646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:18,609 INFO L93 Difference]: Finished difference Result 15599 states and 57718 transitions. [2021-06-05 16:41:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:41:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 16:41:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:18,639 INFO L225 Difference]: With dead ends: 15599 [2021-06-05 16:41:18,640 INFO L226 Difference]: Without dead ends: 15599 [2021-06-05 16:41:18,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:41:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15599 states. [2021-06-05 16:41:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15599 to 11027. [2021-06-05 16:41:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11027 states, 11026 states have (on average 3.7972066025757303) internal successors, (41868), 11026 states have internal predecessors, (41868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11027 states to 11027 states and 41868 transitions. [2021-06-05 16:41:18,862 INFO L78 Accepts]: Start accepts. Automaton has 11027 states and 41868 transitions. Word has length 28 [2021-06-05 16:41:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:18,862 INFO L482 AbstractCegarLoop]: Abstraction has 11027 states and 41868 transitions. [2021-06-05 16:41:18,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:18,862 INFO L276 IsEmpty]: Start isEmpty. Operand 11027 states and 41868 transitions. [2021-06-05 16:41:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:18,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:18,878 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:19,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:19,079 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:19,079 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 72 times [2021-06-05 16:41:19,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:19,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683658528] [2021-06-05 16:41:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:19,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:19,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683658528] [2021-06-05 16:41:19,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683658528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:19,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214676072] [2021-06-05 16:41:19,115 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:19,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:41:19,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:19,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:19,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214676072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:19,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:19,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:41:19,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175365656] [2021-06-05 16:41:19,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:41:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:41:19,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:41:19,206 INFO L87 Difference]: Start difference. First operand 11027 states and 41868 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) [2021-06-05 16:41:19,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:19,791 INFO L93 Difference]: Finished difference Result 16567 states and 60532 transitions. [2021-06-05 16:41:19,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:41:19,792 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 28 [2021-06-05 16:41:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:19,823 INFO L225 Difference]: With dead ends: 16567 [2021-06-05 16:41:19,823 INFO L226 Difference]: Without dead ends: 16567 [2021-06-05 16:41:19,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:41:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16567 states. [2021-06-05 16:41:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16567 to 11355. [2021-06-05 16:41:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11355 states, 11354 states have (on average 3.779284833538841) internal successors, (42910), 11354 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11355 states to 11355 states and 42910 transitions. [2021-06-05 16:41:20,061 INFO L78 Accepts]: Start accepts. Automaton has 11355 states and 42910 transitions. Word has length 28 [2021-06-05 16:41:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:20,061 INFO L482 AbstractCegarLoop]: Abstraction has 11355 states and 42910 transitions. [2021-06-05 16:41:20,061 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) [2021-06-05 16:41:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 11355 states and 42910 transitions. [2021-06-05 16:41:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:20,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:20,077 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:20,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:20,277 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 73 times [2021-06-05 16:41:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:20,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111767471] [2021-06-05 16:41:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:20,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:20,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111767471] [2021-06-05 16:41:20,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111767471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:20,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680530879] [2021-06-05 16:41:20,321 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:20,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680530879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:20,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:20,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:41:20,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324345260] [2021-06-05 16:41:20,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:20,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:20,445 INFO L87 Difference]: Start difference. First operand 11355 states and 42910 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:20,968 INFO L93 Difference]: Finished difference Result 16375 states and 60421 transitions. [2021-06-05 16:41:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:41:20,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-06-05 16:41:20,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:21,000 INFO L225 Difference]: With dead ends: 16375 [2021-06-05 16:41:21,000 INFO L226 Difference]: Without dead ends: 16331 [2021-06-05 16:41:21,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:41:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16331 states. [2021-06-05 16:41:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16331 to 13242. [2021-06-05 16:41:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13242 states, 13241 states have (on average 3.819726606751756) internal successors, (50577), 13241 states have internal predecessors, (50577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13242 states to 13242 states and 50577 transitions. [2021-06-05 16:41:21,255 INFO L78 Accepts]: Start accepts. Automaton has 13242 states and 50577 transitions. Word has length 28 [2021-06-05 16:41:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:21,255 INFO L482 AbstractCegarLoop]: Abstraction has 13242 states and 50577 transitions. [2021-06-05 16:41:21,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 13242 states and 50577 transitions. [2021-06-05 16:41:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:21,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:21,275 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:21,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:21,476 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:21,476 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 74 times [2021-06-05 16:41:21,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:21,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173546089] [2021-06-05 16:41:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:21,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:21,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173546089] [2021-06-05 16:41:21,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173546089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:21,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141575450] [2021-06-05 16:41:21,512 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:21,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:21,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:21,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:21,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141575450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:21,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:21,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:41:21,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146582619] [2021-06-05 16:41:21,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:41:21,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:21,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:41:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:41:21,595 INFO L87 Difference]: Start difference. First operand 13242 states and 50577 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) [2021-06-05 16:41:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:22,113 INFO L93 Difference]: Finished difference Result 18146 states and 67670 transitions. [2021-06-05 16:41:22,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:41:22,114 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 28 [2021-06-05 16:41:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:22,148 INFO L225 Difference]: With dead ends: 18146 [2021-06-05 16:41:22,148 INFO L226 Difference]: Without dead ends: 18138 [2021-06-05 16:41:22,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:41:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18138 states. [2021-06-05 16:41:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18138 to 13160. [2021-06-05 16:41:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 3.8226308990044835) internal successors, (50302), 13159 states have internal predecessors, (50302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 50302 transitions. [2021-06-05 16:41:22,417 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 50302 transitions. Word has length 28 [2021-06-05 16:41:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:22,417 INFO L482 AbstractCegarLoop]: Abstraction has 13160 states and 50302 transitions. [2021-06-05 16:41:22,417 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) [2021-06-05 16:41:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 50302 transitions. [2021-06-05 16:41:22,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:22,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:22,437 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:22,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:22,638 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:22,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:22,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 75 times [2021-06-05 16:41:22,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:22,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507098576] [2021-06-05 16:41:22,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:22,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:22,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507098576] [2021-06-05 16:41:22,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507098576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:22,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719456500] [2021-06-05 16:41:22,684 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:22,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:41:22,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:22,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:22,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:22,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719456500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:22,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:22,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:41:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745705334] [2021-06-05 16:41:22,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:22,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:22,771 INFO L87 Difference]: Start difference. First operand 13160 states and 50302 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:23,246 INFO L93 Difference]: Finished difference Result 18024 states and 67311 transitions. [2021-06-05 16:41:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:41:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 16:41:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:23,281 INFO L225 Difference]: With dead ends: 18024 [2021-06-05 16:41:23,281 INFO L226 Difference]: Without dead ends: 18012 [2021-06-05 16:41:23,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:41:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-06-05 16:41:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 13126. [2021-06-05 16:41:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 13125 states have (on average 3.8246857142857142) internal successors, (50199), 13125 states have internal predecessors, (50199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 50199 transitions. [2021-06-05 16:41:23,564 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 50199 transitions. Word has length 28 [2021-06-05 16:41:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:23,564 INFO L482 AbstractCegarLoop]: Abstraction has 13126 states and 50199 transitions. [2021-06-05 16:41:23,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 50199 transitions. [2021-06-05 16:41:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:23,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:23,587 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:23,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-05 16:41:23,787 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 76 times [2021-06-05 16:41:23,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:23,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661416723] [2021-06-05 16:41:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:23,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661416723] [2021-06-05 16:41:23,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661416723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792331260] [2021-06-05 16:41:23,824 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:23,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:41:23,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:23,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:23,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792331260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:23,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:23,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:41:23,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806264015] [2021-06-05 16:41:23,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:41:23,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:23,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:41:23,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:41:23,951 INFO L87 Difference]: Start difference. First operand 13126 states and 50199 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:24,976 INFO L93 Difference]: Finished difference Result 24612 states and 88773 transitions. [2021-06-05 16:41:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:41:24,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:25,027 INFO L225 Difference]: With dead ends: 24612 [2021-06-05 16:41:25,027 INFO L226 Difference]: Without dead ends: 24612 [2021-06-05 16:41:25,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:41:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24612 states. [2021-06-05 16:41:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24612 to 13108. [2021-06-05 16:41:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13108 states, 13107 states have (on average 3.8236057068741895) internal successors, (50116), 13107 states have internal predecessors, (50116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13108 states to 13108 states and 50116 transitions. [2021-06-05 16:41:25,346 INFO L78 Accepts]: Start accepts. Automaton has 13108 states and 50116 transitions. Word has length 28 [2021-06-05 16:41:25,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:25,346 INFO L482 AbstractCegarLoop]: Abstraction has 13108 states and 50116 transitions. [2021-06-05 16:41:25,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:25,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13108 states and 50116 transitions. [2021-06-05 16:41:25,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:25,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:25,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:25,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-06-05 16:41:25,566 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-05 16:41:25,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:25,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479109137] [2021-06-05 16:41:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:25,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:25,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479109137] [2021-06-05 16:41:25,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479109137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:25,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508842042] [2021-06-05 16:41:25,595 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:25,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:41:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:25,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508842042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:25,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:25,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:41:25,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706605786] [2021-06-05 16:41:25,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:41:25,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:41:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:41:25,710 INFO L87 Difference]: Start difference. First operand 13108 states and 50116 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:26,437 INFO L93 Difference]: Finished difference Result 20270 states and 73737 transitions. [2021-06-05 16:41:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:41:26,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-06-05 16:41:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:26,476 INFO L225 Difference]: With dead ends: 20270 [2021-06-05 16:41:26,476 INFO L226 Difference]: Without dead ends: 20257 [2021-06-05 16:41:26,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:41:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20257 states. [2021-06-05 16:41:26,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20257 to 14410. [2021-06-05 16:41:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14410 states, 14409 states have (on average 3.8785481296411963) internal successors, (55886), 14409 states have internal predecessors, (55886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 55886 transitions. [2021-06-05 16:41:26,803 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 55886 transitions. Word has length 28 [2021-06-05 16:41:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:26,803 INFO L482 AbstractCegarLoop]: Abstraction has 14410 states and 55886 transitions. [2021-06-05 16:41:26,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 55886 transitions. [2021-06-05 16:41:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:26,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:26,825 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:27,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 16:41:27,026 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-05 16:41:27,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:27,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240901993] [2021-06-05 16:41:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:27,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:27,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240901993] [2021-06-05 16:41:27,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240901993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:27,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502474740] [2021-06-05 16:41:27,054 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:27,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:27,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502474740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:27,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:27,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:41:27,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343491595] [2021-06-05 16:41:27,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:41:27,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:27,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:41:27,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:41:27,168 INFO L87 Difference]: Start difference. First operand 14410 states and 55886 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:27,975 INFO L93 Difference]: Finished difference Result 20362 states and 73979 transitions. [2021-06-05 16:41:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:41:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-06-05 16:41:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:28,014 INFO L225 Difference]: With dead ends: 20362 [2021-06-05 16:41:28,014 INFO L226 Difference]: Without dead ends: 20356 [2021-06-05 16:41:28,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:41:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-06-05 16:41:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 14386. [2021-06-05 16:41:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14386 states, 14385 states have (on average 3.877650330205075) internal successors, (55780), 14385 states have internal predecessors, (55780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14386 states to 14386 states and 55780 transitions. [2021-06-05 16:41:28,349 INFO L78 Accepts]: Start accepts. Automaton has 14386 states and 55780 transitions. Word has length 28 [2021-06-05 16:41:28,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:28,349 INFO L482 AbstractCegarLoop]: Abstraction has 14386 states and 55780 transitions. [2021-06-05 16:41:28,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 14386 states and 55780 transitions. [2021-06-05 16:41:28,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:28,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:28,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:28,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-05 16:41:28,572 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:28,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:28,572 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-05 16:41:28,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:28,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639825760] [2021-06-05 16:41:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:28,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:28,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639825760] [2021-06-05 16:41:28,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639825760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:28,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128171380] [2021-06-05 16:41:28,609 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:28,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:28,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128171380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:28,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:28,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:41:28,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047316837] [2021-06-05 16:41:28,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:28,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:28,715 INFO L87 Difference]: Start difference. First operand 14386 states and 55780 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:29,394 INFO L93 Difference]: Finished difference Result 23158 states and 84169 transitions. [2021-06-05 16:41:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:41:29,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 16:41:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:29,439 INFO L225 Difference]: With dead ends: 23158 [2021-06-05 16:41:29,439 INFO L226 Difference]: Without dead ends: 23145 [2021-06-05 16:41:29,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:41:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23145 states. [2021-06-05 16:41:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23145 to 14458. [2021-06-05 16:41:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14458 states, 14457 states have (on average 3.882548246524175) internal successors, (56130), 14457 states have internal predecessors, (56130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14458 states to 14458 states and 56130 transitions. [2021-06-05 16:41:29,891 INFO L78 Accepts]: Start accepts. Automaton has 14458 states and 56130 transitions. Word has length 28 [2021-06-05 16:41:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:29,891 INFO L482 AbstractCegarLoop]: Abstraction has 14458 states and 56130 transitions. [2021-06-05 16:41:29,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 14458 states and 56130 transitions. [2021-06-05 16:41:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:29,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:29,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:30,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-05 16:41:30,115 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:30,116 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-05 16:41:30,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:30,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243031863] [2021-06-05 16:41:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:30,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:30,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243031863] [2021-06-05 16:41:30,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243031863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:30,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938096776] [2021-06-05 16:41:30,146 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:30,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:41:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:30,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:30,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938096776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:30,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:30,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:41:30,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093845790] [2021-06-05 16:41:30,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:30,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:30,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:30,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:30,262 INFO L87 Difference]: Start difference. First operand 14458 states and 56130 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:31,039 INFO L93 Difference]: Finished difference Result 24792 states and 89366 transitions. [2021-06-05 16:41:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:41:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 16:41:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:31,092 INFO L225 Difference]: With dead ends: 24792 [2021-06-05 16:41:31,092 INFO L226 Difference]: Without dead ends: 24792 [2021-06-05 16:41:31,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:41:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24792 states. [2021-06-05 16:41:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24792 to 14502. [2021-06-05 16:41:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14502 states, 14501 states have (on average 3.8793876284394178) internal successors, (56255), 14501 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14502 states to 14502 states and 56255 transitions. [2021-06-05 16:41:31,446 INFO L78 Accepts]: Start accepts. Automaton has 14502 states and 56255 transitions. Word has length 28 [2021-06-05 16:41:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:31,446 INFO L482 AbstractCegarLoop]: Abstraction has 14502 states and 56255 transitions. [2021-06-05 16:41:31,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 14502 states and 56255 transitions. [2021-06-05 16:41:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:31,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:31,468 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:31,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:31,669 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 77 times [2021-06-05 16:41:31,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:31,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520267699] [2021-06-05 16:41:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:31,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:31,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520267699] [2021-06-05 16:41:31,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520267699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:31,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729968758] [2021-06-05 16:41:31,704 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:31,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:41:31,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:31,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:31,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729968758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:31,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:31,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:41:31,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186781273] [2021-06-05 16:41:31,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:41:31,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:41:31,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:41:31,807 INFO L87 Difference]: Start difference. First operand 14502 states and 56255 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:32,785 INFO L93 Difference]: Finished difference Result 24486 states and 90901 transitions. [2021-06-05 16:41:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:41:32,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-06-05 16:41:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:32,835 INFO L225 Difference]: With dead ends: 24486 [2021-06-05 16:41:32,835 INFO L226 Difference]: Without dead ends: 24482 [2021-06-05 16:41:32,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:41:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24482 states. [2021-06-05 16:41:33,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24482 to 14756. [2021-06-05 16:41:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14756 states, 14755 states have (on average 3.869739071501186) internal successors, (57098), 14755 states have internal predecessors, (57098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14756 states to 14756 states and 57098 transitions. [2021-06-05 16:41:33,270 INFO L78 Accepts]: Start accepts. Automaton has 14756 states and 57098 transitions. Word has length 28 [2021-06-05 16:41:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:33,271 INFO L482 AbstractCegarLoop]: Abstraction has 14756 states and 57098 transitions. [2021-06-05 16:41:33,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 14756 states and 57098 transitions. [2021-06-05 16:41:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:33,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:33,293 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:33,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:33,497 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:33,497 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-05 16:41:33,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:33,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663662597] [2021-06-05 16:41:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:33,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:33,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663662597] [2021-06-05 16:41:33,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663662597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:33,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245396907] [2021-06-05 16:41:33,532 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:33,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:41:33,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:33,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:33,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245396907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:33,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:33,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:41:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087913894] [2021-06-05 16:41:33,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:33,628 INFO L87 Difference]: Start difference. First operand 14756 states and 57098 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) [2021-06-05 16:41:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:34,313 INFO L93 Difference]: Finished difference Result 21631 states and 80082 transitions. [2021-06-05 16:41:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:41:34,314 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 28 [2021-06-05 16:41:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:34,357 INFO L225 Difference]: With dead ends: 21631 [2021-06-05 16:41:34,357 INFO L226 Difference]: Without dead ends: 21608 [2021-06-05 16:41:34,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:41:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21608 states. [2021-06-05 16:41:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21608 to 15111. [2021-06-05 16:41:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15111 states, 15110 states have (on average 3.888682991396426) internal successors, (58758), 15110 states have internal predecessors, (58758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15111 states to 15111 states and 58758 transitions. [2021-06-05 16:41:34,682 INFO L78 Accepts]: Start accepts. Automaton has 15111 states and 58758 transitions. Word has length 28 [2021-06-05 16:41:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:34,682 INFO L482 AbstractCegarLoop]: Abstraction has 15111 states and 58758 transitions. [2021-06-05 16:41:34,682 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) [2021-06-05 16:41:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 15111 states and 58758 transitions. [2021-06-05 16:41:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:34,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:34,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:34,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4027 [2021-06-05 16:41:34,909 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-05 16:41:34,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:34,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034561972] [2021-06-05 16:41:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:34,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:34,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034561972] [2021-06-05 16:41:34,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034561972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:34,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107406398] [2021-06-05 16:41:34,949 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:34,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:41:34,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:34,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:35,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107406398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:35,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:35,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:41:35,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99839665] [2021-06-05 16:41:35,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:35,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:35,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:35,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:35,065 INFO L87 Difference]: Start difference. First operand 15111 states and 58758 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) [2021-06-05 16:41:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:35,813 INFO L93 Difference]: Finished difference Result 21728 states and 79303 transitions. [2021-06-05 16:41:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:41:35,813 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 28 [2021-06-05 16:41:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:35,856 INFO L225 Difference]: With dead ends: 21728 [2021-06-05 16:41:35,856 INFO L226 Difference]: Without dead ends: 21728 [2021-06-05 16:41:35,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:41:35,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21728 states. [2021-06-05 16:41:36,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21728 to 15230. [2021-06-05 16:41:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15230 states, 15229 states have (on average 3.880753824939261) internal successors, (59100), 15229 states have internal predecessors, (59100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15230 states to 15230 states and 59100 transitions. [2021-06-05 16:41:36,254 INFO L78 Accepts]: Start accepts. Automaton has 15230 states and 59100 transitions. Word has length 28 [2021-06-05 16:41:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:36,254 INFO L482 AbstractCegarLoop]: Abstraction has 15230 states and 59100 transitions. [2021-06-05 16:41:36,254 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) [2021-06-05 16:41:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 15230 states and 59100 transitions. [2021-06-05 16:41:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:36,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:36,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:36,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:36,477 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:36,478 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-05 16:41:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:36,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729994296] [2021-06-05 16:41:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:36,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:36,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729994296] [2021-06-05 16:41:36,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729994296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:36,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810799888] [2021-06-05 16:41:36,512 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:36,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:41:36,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:36,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:36,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810799888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:36,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:36,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:41:36,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514326728] [2021-06-05 16:41:36,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:36,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:36,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:36,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:36,615 INFO L87 Difference]: Start difference. First operand 15230 states and 59100 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) [2021-06-05 16:41:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:37,328 INFO L93 Difference]: Finished difference Result 24246 states and 88914 transitions. [2021-06-05 16:41:37,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:41:37,328 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 28 [2021-06-05 16:41:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:37,379 INFO L225 Difference]: With dead ends: 24246 [2021-06-05 16:41:37,379 INFO L226 Difference]: Without dead ends: 24246 [2021-06-05 16:41:37,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:41:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24246 states. [2021-06-05 16:41:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24246 to 16389. [2021-06-05 16:41:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16389 states, 16388 states have (on average 3.862521357090554) internal successors, (63299), 16388 states have internal predecessors, (63299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16389 states to 16389 states and 63299 transitions. [2021-06-05 16:41:37,743 INFO L78 Accepts]: Start accepts. Automaton has 16389 states and 63299 transitions. Word has length 28 [2021-06-05 16:41:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:37,743 INFO L482 AbstractCegarLoop]: Abstraction has 16389 states and 63299 transitions. [2021-06-05 16:41:37,743 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) [2021-06-05 16:41:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 16389 states and 63299 transitions. [2021-06-05 16:41:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:37,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:37,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:37,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:37,967 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-05 16:41:37,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:37,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194379797] [2021-06-05 16:41:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:38,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194379797] [2021-06-05 16:41:38,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194379797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293959388] [2021-06-05 16:41:38,001 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:38,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293959388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:38,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:38,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:41:38,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472140455] [2021-06-05 16:41:38,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:41:38,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:38,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:41:38,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:41:38,131 INFO L87 Difference]: Start difference. First operand 16389 states and 63299 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:39,012 INFO L93 Difference]: Finished difference Result 27385 states and 99086 transitions. [2021-06-05 16:41:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:41:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-06-05 16:41:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:39,071 INFO L225 Difference]: With dead ends: 27385 [2021-06-05 16:41:39,071 INFO L226 Difference]: Without dead ends: 27385 [2021-06-05 16:41:39,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:41:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27385 states. [2021-06-05 16:41:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27385 to 16619. [2021-06-05 16:41:39,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16619 states, 16618 states have (on average 3.8775424238777227) internal successors, (64437), 16618 states have internal predecessors, (64437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16619 states to 16619 states and 64437 transitions. [2021-06-05 16:41:39,518 INFO L78 Accepts]: Start accepts. Automaton has 16619 states and 64437 transitions. Word has length 28 [2021-06-05 16:41:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:39,518 INFO L482 AbstractCegarLoop]: Abstraction has 16619 states and 64437 transitions. [2021-06-05 16:41:39,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 16619 states and 64437 transitions. [2021-06-05 16:41:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:39,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:39,541 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:39,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-06-05 16:41:39,742 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:39,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:39,742 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 78 times [2021-06-05 16:41:39,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:39,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968223268] [2021-06-05 16:41:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:39,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:39,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968223268] [2021-06-05 16:41:39,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968223268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:39,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234475652] [2021-06-05 16:41:39,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:39,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:41:39,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:39,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234475652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:39,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:39,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:41:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632859385] [2021-06-05 16:41:39,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:39,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:39,914 INFO L87 Difference]: Start difference. First operand 16619 states and 64437 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:41,499 INFO L93 Difference]: Finished difference Result 42879 states and 155463 transitions. [2021-06-05 16:41:41,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:41:41,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:41,593 INFO L225 Difference]: With dead ends: 42879 [2021-06-05 16:41:41,593 INFO L226 Difference]: Without dead ends: 42879 [2021-06-05 16:41:41,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 936.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:41:41,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42879 states. [2021-06-05 16:41:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42879 to 17863. [2021-06-05 16:41:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.9155189788377562) internal successors, (69939), 17862 states have internal predecessors, (69939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 69939 transitions. [2021-06-05 16:41:42,364 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 69939 transitions. Word has length 28 [2021-06-05 16:41:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:42,364 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 69939 transitions. [2021-06-05 16:41:42,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 69939 transitions. [2021-06-05 16:41:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:42,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:42,393 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:42,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4031,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:42,594 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:42,594 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 79 times [2021-06-05 16:41:42,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:42,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023734770] [2021-06-05 16:41:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:42,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:42,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023734770] [2021-06-05 16:41:42,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023734770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:42,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666025848] [2021-06-05 16:41:42,633 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:42,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666025848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:42,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:42,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:41:42,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364278295] [2021-06-05 16:41:42,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:42,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:42,773 INFO L87 Difference]: Start difference. First operand 17863 states and 69939 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:44,406 INFO L93 Difference]: Finished difference Result 41907 states and 152905 transitions. [2021-06-05 16:41:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:41:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:44,499 INFO L225 Difference]: With dead ends: 41907 [2021-06-05 16:41:44,499 INFO L226 Difference]: Without dead ends: 41907 [2021-06-05 16:41:44,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 1015.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:41:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41907 states. [2021-06-05 16:41:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41907 to 17837. [2021-06-05 16:41:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.912480376766091) internal successors, (69783), 17836 states have internal predecessors, (69783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 69783 transitions. [2021-06-05 16:41:45,092 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 69783 transitions. Word has length 28 [2021-06-05 16:41:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:45,092 INFO L482 AbstractCegarLoop]: Abstraction has 17837 states and 69783 transitions. [2021-06-05 16:41:45,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 69783 transitions. [2021-06-05 16:41:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:45,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:45,117 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:45,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-05 16:41:45,318 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-05 16:41:45,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:45,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883701589] [2021-06-05 16:41:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:45,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883701589] [2021-06-05 16:41:45,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883701589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851285351] [2021-06-05 16:41:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:45,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:45,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:45,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:45,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851285351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:45,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:45,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:41:45,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287469509] [2021-06-05 16:41:45,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:41:45,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:45,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:41:45,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:41:45,433 INFO L87 Difference]: Start difference. First operand 17837 states and 69783 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:45,736 INFO L93 Difference]: Finished difference Result 28682 states and 110964 transitions. [2021-06-05 16:41:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:41:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-05 16:41:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:45,802 INFO L225 Difference]: With dead ends: 28682 [2021-06-05 16:41:45,802 INFO L226 Difference]: Without dead ends: 28632 [2021-06-05 16:41:45,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:41:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28632 states. [2021-06-05 16:41:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28632 to 23563. [2021-06-05 16:41:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23563 states, 23562 states have (on average 3.9230965113318055) internal successors, (92436), 23562 states have internal predecessors, (92436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23563 states to 23563 states and 92436 transitions. [2021-06-05 16:41:46,352 INFO L78 Accepts]: Start accepts. Automaton has 23563 states and 92436 transitions. Word has length 28 [2021-06-05 16:41:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:46,352 INFO L482 AbstractCegarLoop]: Abstraction has 23563 states and 92436 transitions. [2021-06-05 16:41:46,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 23563 states and 92436 transitions. [2021-06-05 16:41:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:46,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:46,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:46,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-06-05 16:41:46,588 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-05 16:41:46,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:46,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181614599] [2021-06-05 16:41:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:46,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:46,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181614599] [2021-06-05 16:41:46,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181614599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:46,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404564601] [2021-06-05 16:41:46,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:46,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:41:46,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:46,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404564601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:46,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:46,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:41:46,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948570770] [2021-06-05 16:41:46,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:41:46,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:41:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:41:46,711 INFO L87 Difference]: Start difference. First operand 23563 states and 92436 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:46,972 INFO L93 Difference]: Finished difference Result 26308 states and 100773 transitions. [2021-06-05 16:41:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:41:46,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-05 16:41:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:47,032 INFO L225 Difference]: With dead ends: 26308 [2021-06-05 16:41:47,033 INFO L226 Difference]: Without dead ends: 26308 [2021-06-05 16:41:47,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:41:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26308 states. [2021-06-05 16:41:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26308 to 23066. [2021-06-05 16:41:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23066 states, 23065 states have (on average 3.9134619553435943) internal successors, (90264), 23065 states have internal predecessors, (90264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23066 states to 23066 states and 90264 transitions. [2021-06-05 16:41:47,488 INFO L78 Accepts]: Start accepts. Automaton has 23066 states and 90264 transitions. Word has length 28 [2021-06-05 16:41:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:47,488 INFO L482 AbstractCegarLoop]: Abstraction has 23066 states and 90264 transitions. [2021-06-05 16:41:47,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 23066 states and 90264 transitions. [2021-06-05 16:41:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:47,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:47,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:47,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-06-05 16:41:47,725 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-05 16:41:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:47,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702075600] [2021-06-05 16:41:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:47,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:47,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702075600] [2021-06-05 16:41:47,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702075600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:47,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712598837] [2021-06-05 16:41:47,765 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:47,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:41:47,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:47,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:47,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712598837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:47,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:47,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:41:47,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451796013] [2021-06-05 16:41:47,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:41:47,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:47,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:41:47,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:41:47,882 INFO L87 Difference]: Start difference. First operand 23066 states and 90264 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:48,811 INFO L93 Difference]: Finished difference Result 35513 states and 132496 transitions. [2021-06-05 16:41:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:41:48,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:48,901 INFO L225 Difference]: With dead ends: 35513 [2021-06-05 16:41:48,901 INFO L226 Difference]: Without dead ends: 35513 [2021-06-05 16:41:48,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:41:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35513 states. [2021-06-05 16:41:49,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35513 to 23134. [2021-06-05 16:41:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 23133 states have (on average 3.9115981498292482) internal successors, (90487), 23133 states have internal predecessors, (90487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 90487 transitions. [2021-06-05 16:41:49,615 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 90487 transitions. Word has length 28 [2021-06-05 16:41:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:49,615 INFO L482 AbstractCegarLoop]: Abstraction has 23134 states and 90487 transitions. [2021-06-05 16:41:49,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 90487 transitions. [2021-06-05 16:41:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:49,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:49,650 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:49,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-06-05 16:41:49,850 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:49,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:49,851 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-05 16:41:49,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:49,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124042922] [2021-06-05 16:41:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:49,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:49,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124042922] [2021-06-05 16:41:49,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124042922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:49,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490691938] [2021-06-05 16:41:49,890 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:49,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:41:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:50,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490691938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:50,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:50,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:41:50,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858014174] [2021-06-05 16:41:50,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:50,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:50,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:50,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:50,055 INFO L87 Difference]: Start difference. First operand 23134 states and 90487 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:51,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:51,691 INFO L93 Difference]: Finished difference Result 45671 states and 168413 transitions. [2021-06-05 16:41:51,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:41:51,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:51,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:51,808 INFO L225 Difference]: With dead ends: 45671 [2021-06-05 16:41:51,808 INFO L226 Difference]: Without dead ends: 45671 [2021-06-05 16:41:51,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 958.6ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:41:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45671 states. [2021-06-05 16:41:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45671 to 23135. [2021-06-05 16:41:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23135 states, 23134 states have (on average 3.913460707184231) internal successors, (90534), 23134 states have internal predecessors, (90534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23135 states to 23135 states and 90534 transitions. [2021-06-05 16:41:52,652 INFO L78 Accepts]: Start accepts. Automaton has 23135 states and 90534 transitions. Word has length 28 [2021-06-05 16:41:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:52,652 INFO L482 AbstractCegarLoop]: Abstraction has 23135 states and 90534 transitions. [2021-06-05 16:41:52,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 23135 states and 90534 transitions. [2021-06-05 16:41:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:52,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:52,864 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:53,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:53,077 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-05 16:41:53,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:53,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970163775] [2021-06-05 16:41:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:53,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:53,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970163775] [2021-06-05 16:41:53,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970163775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:53,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559346783] [2021-06-05 16:41:53,137 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:53,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:41:53,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:53,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559346783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:53,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:53,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:41:53,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103302346] [2021-06-05 16:41:53,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:53,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:53,276 INFO L87 Difference]: Start difference. First operand 23135 states and 90534 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:54,954 INFO L93 Difference]: Finished difference Result 45296 states and 167759 transitions. [2021-06-05 16:41:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:41:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:55,085 INFO L225 Difference]: With dead ends: 45296 [2021-06-05 16:41:55,085 INFO L226 Difference]: Without dead ends: 45296 [2021-06-05 16:41:55,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 1049.2ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:41:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45296 states. [2021-06-05 16:41:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45296 to 22919. [2021-06-05 16:41:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22919 states, 22918 states have (on average 3.9066236146260582) internal successors, (89532), 22918 states have internal predecessors, (89532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22919 states to 22919 states and 89532 transitions. [2021-06-05 16:41:55,921 INFO L78 Accepts]: Start accepts. Automaton has 22919 states and 89532 transitions. Word has length 28 [2021-06-05 16:41:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:55,921 INFO L482 AbstractCegarLoop]: Abstraction has 22919 states and 89532 transitions. [2021-06-05 16:41:55,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 22919 states and 89532 transitions. [2021-06-05 16:41:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:55,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:55,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:56,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:56,157 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:56,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-05 16:41:56,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:56,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955856823] [2021-06-05 16:41:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:56,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:56,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955856823] [2021-06-05 16:41:56,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955856823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:56,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490861982] [2021-06-05 16:41:56,187 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:56,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:41:56,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:41:56,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490861982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:56,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:56,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:41:56,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980037679] [2021-06-05 16:41:56,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:41:56,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:56,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:41:56,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:41:56,273 INFO L87 Difference]: Start difference. First operand 22919 states and 89532 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:56,732 INFO L93 Difference]: Finished difference Result 35247 states and 132459 transitions. [2021-06-05 16:41:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:41:56,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:56,826 INFO L225 Difference]: With dead ends: 35247 [2021-06-05 16:41:56,826 INFO L226 Difference]: Without dead ends: 35230 [2021-06-05 16:41:56,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:41:56,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35230 states. [2021-06-05 16:41:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35230 to 23187. [2021-06-05 16:41:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23187 states, 23186 states have (on average 3.9111532821530233) internal successors, (90684), 23186 states have internal predecessors, (90684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23187 states to 23187 states and 90684 transitions. [2021-06-05 16:41:57,569 INFO L78 Accepts]: Start accepts. Automaton has 23187 states and 90684 transitions. Word has length 28 [2021-06-05 16:41:57,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:57,569 INFO L482 AbstractCegarLoop]: Abstraction has 23187 states and 90684 transitions. [2021-06-05 16:41:57,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 23187 states and 90684 transitions. [2021-06-05 16:41:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:57,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:57,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:57,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:57,810 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-05 16:41:57,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:57,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115473236] [2021-06-05 16:41:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:57,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:57,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115473236] [2021-06-05 16:41:57,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115473236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:57,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718041754] [2021-06-05 16:41:57,844 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:57,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:57,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:57,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:41:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:41:57,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718041754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:57,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:57,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:41:57,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424583893] [2021-06-05 16:41:57,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:41:57,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:41:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:41:57,943 INFO L87 Difference]: Start difference. First operand 23187 states and 90684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:58,434 INFO L93 Difference]: Finished difference Result 37405 states and 139306 transitions. [2021-06-05 16:41:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:41:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:58,536 INFO L225 Difference]: With dead ends: 37405 [2021-06-05 16:41:58,536 INFO L226 Difference]: Without dead ends: 37405 [2021-06-05 16:41:58,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:41:58,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37405 states. [2021-06-05 16:41:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37405 to 22856. [2021-06-05 16:41:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22856 states, 22855 states have (on average 3.898402975278932) internal successors, (89098), 22855 states have internal predecessors, (89098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22856 states to 22856 states and 89098 transitions. [2021-06-05 16:41:59,133 INFO L78 Accepts]: Start accepts. Automaton has 22856 states and 89098 transitions. Word has length 28 [2021-06-05 16:41:59,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:59,133 INFO L482 AbstractCegarLoop]: Abstraction has 22856 states and 89098 transitions. [2021-06-05 16:41:59,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 22856 states and 89098 transitions. [2021-06-05 16:41:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:59,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:59,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:59,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:59,513 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-05 16:41:59,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:59,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192929005] [2021-06-05 16:41:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:59,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:59,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192929005] [2021-06-05 16:41:59,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192929005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:59,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925425727] [2021-06-05 16:41:59,556 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:59,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:41:59,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:59,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:59,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925425727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:59,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:59,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:41:59,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931061410] [2021-06-05 16:41:59,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:41:59,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:41:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:41:59,662 INFO L87 Difference]: Start difference. First operand 22856 states and 89098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:00,586 INFO L93 Difference]: Finished difference Result 32629 states and 122440 transitions. [2021-06-05 16:42:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:42:00,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:00,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:00,661 INFO L225 Difference]: With dead ends: 32629 [2021-06-05 16:42:00,662 INFO L226 Difference]: Without dead ends: 32629 [2021-06-05 16:42:00,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 433.2ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:42:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32629 states. [2021-06-05 16:42:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32629 to 22904. [2021-06-05 16:42:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22904 states, 22903 states have (on average 3.8973060297777584) internal successors, (89260), 22903 states have internal predecessors, (89260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22904 states to 22904 states and 89260 transitions. [2021-06-05 16:42:01,367 INFO L78 Accepts]: Start accepts. Automaton has 22904 states and 89260 transitions. Word has length 28 [2021-06-05 16:42:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:01,367 INFO L482 AbstractCegarLoop]: Abstraction has 22904 states and 89260 transitions. [2021-06-05 16:42:01,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 22904 states and 89260 transitions. [2021-06-05 16:42:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:01,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:01,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:01,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4040,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:01,603 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:01,603 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-05 16:42:01,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:01,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240804523] [2021-06-05 16:42:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:01,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:01,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240804523] [2021-06-05 16:42:01,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240804523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:01,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012688702] [2021-06-05 16:42:01,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:01,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:01,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:01,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:01,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:01,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012688702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:01,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:01,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:42:01,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593631756] [2021-06-05 16:42:01,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:42:01,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:01,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:42:01,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:42:01,747 INFO L87 Difference]: Start difference. First operand 22904 states and 89260 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:02,912 INFO L93 Difference]: Finished difference Result 34174 states and 126879 transitions. [2021-06-05 16:42:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:42:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:02,996 INFO L225 Difference]: With dead ends: 34174 [2021-06-05 16:42:02,996 INFO L226 Difference]: Without dead ends: 34174 [2021-06-05 16:42:02,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:42:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34174 states. [2021-06-05 16:42:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34174 to 23462. [2021-06-05 16:42:03,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23462 states, 23461 states have (on average 3.8782234346362046) internal successors, (90987), 23461 states have internal predecessors, (90987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23462 states to 23462 states and 90987 transitions. [2021-06-05 16:42:03,701 INFO L78 Accepts]: Start accepts. Automaton has 23462 states and 90987 transitions. Word has length 28 [2021-06-05 16:42:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:03,701 INFO L482 AbstractCegarLoop]: Abstraction has 23462 states and 90987 transitions. [2021-06-05 16:42:03,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:03,701 INFO L276 IsEmpty]: Start isEmpty. Operand 23462 states and 90987 transitions. [2021-06-05 16:42:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:03,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:03,738 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:03,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-06-05 16:42:03,938 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:03,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-05 16:42:03,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:03,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679903688] [2021-06-05 16:42:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:03,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:03,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679903688] [2021-06-05 16:42:03,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679903688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:03,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425934791] [2021-06-05 16:42:03,977 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:04,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:42:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:04,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425934791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:04,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:04,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:42:04,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684881176] [2021-06-05 16:42:04,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:42:04,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:04,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:42:04,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:42:04,278 INFO L87 Difference]: Start difference. First operand 23462 states and 90987 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:05,280 INFO L93 Difference]: Finished difference Result 33276 states and 124519 transitions. [2021-06-05 16:42:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:42:05,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:05,374 INFO L225 Difference]: With dead ends: 33276 [2021-06-05 16:42:05,374 INFO L226 Difference]: Without dead ends: 33272 [2021-06-05 16:42:05,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 695.9ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:42:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33272 states. [2021-06-05 16:42:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33272 to 23354. [2021-06-05 16:42:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23354 states, 23353 states have (on average 3.880657731340727) internal successors, (90625), 23353 states have internal predecessors, (90625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23354 states to 23354 states and 90625 transitions. [2021-06-05 16:42:06,088 INFO L78 Accepts]: Start accepts. Automaton has 23354 states and 90625 transitions. Word has length 28 [2021-06-05 16:42:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:06,088 INFO L482 AbstractCegarLoop]: Abstraction has 23354 states and 90625 transitions. [2021-06-05 16:42:06,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23354 states and 90625 transitions. [2021-06-05 16:42:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:06,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:06,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:06,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4042,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:06,322 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:06,322 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-05 16:42:06,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:06,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368298118] [2021-06-05 16:42:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:06,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368298118] [2021-06-05 16:42:06,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368298118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:06,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375132812] [2021-06-05 16:42:06,352 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:06,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:42:06,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:06,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:06,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:42:06,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375132812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:06,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:06,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:42:06,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505015176] [2021-06-05 16:42:06,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:42:06,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:06,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:42:06,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:42:06,453 INFO L87 Difference]: Start difference. First operand 23354 states and 90625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:06,856 INFO L93 Difference]: Finished difference Result 29681 states and 111114 transitions. [2021-06-05 16:42:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:42:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:06,931 INFO L225 Difference]: With dead ends: 29681 [2021-06-05 16:42:06,931 INFO L226 Difference]: Without dead ends: 29681 [2021-06-05 16:42:06,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:42:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29681 states. [2021-06-05 16:42:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29681 to 23664. [2021-06-05 16:42:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23664 states, 23663 states have (on average 3.872628153657609) internal successors, (91638), 23663 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:07,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23664 states to 23664 states and 91638 transitions. [2021-06-05 16:42:07,582 INFO L78 Accepts]: Start accepts. Automaton has 23664 states and 91638 transitions. Word has length 28 [2021-06-05 16:42:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:07,582 INFO L482 AbstractCegarLoop]: Abstraction has 23664 states and 91638 transitions. [2021-06-05 16:42:07,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 23664 states and 91638 transitions. [2021-06-05 16:42:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:07,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:07,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:07,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-05 16:42:07,823 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-05 16:42:07,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:07,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645780274] [2021-06-05 16:42:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:07,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:07,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645780274] [2021-06-05 16:42:07,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645780274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:07,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535541326] [2021-06-05 16:42:07,862 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:42:07,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535541326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:07,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:07,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:42:07,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811551046] [2021-06-05 16:42:07,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:07,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:07,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:07,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:07,955 INFO L87 Difference]: Start difference. First operand 23664 states and 91638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:08,806 INFO L93 Difference]: Finished difference Result 34438 states and 127402 transitions. [2021-06-05 16:42:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:42:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:08,884 INFO L225 Difference]: With dead ends: 34438 [2021-06-05 16:42:08,884 INFO L226 Difference]: Without dead ends: 34438 [2021-06-05 16:42:08,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:42:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34438 states. [2021-06-05 16:42:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34438 to 25439. [2021-06-05 16:42:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25439 states, 25438 states have (on average 3.8818696438399245) internal successors, (98747), 25438 states have internal predecessors, (98747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25439 states to 25439 states and 98747 transitions. [2021-06-05 16:42:09,733 INFO L78 Accepts]: Start accepts. Automaton has 25439 states and 98747 transitions. Word has length 28 [2021-06-05 16:42:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:09,733 INFO L482 AbstractCegarLoop]: Abstraction has 25439 states and 98747 transitions. [2021-06-05 16:42:09,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 25439 states and 98747 transitions. [2021-06-05 16:42:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:09,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:09,781 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:09,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-06-05 16:42:09,982 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:09,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:09,982 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-05 16:42:09,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:09,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613531808] [2021-06-05 16:42:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:10,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:10,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613531808] [2021-06-05 16:42:10,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613531808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:10,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603889099] [2021-06-05 16:42:10,025 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:10,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:10,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:10,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:42:10,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603889099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:10,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:10,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:42:10,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98079950] [2021-06-05 16:42:10,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:10,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:10,121 INFO L87 Difference]: Start difference. First operand 25439 states and 98747 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:10,416 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 16:42:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:10,988 INFO L93 Difference]: Finished difference Result 32691 states and 122893 transitions. [2021-06-05 16:42:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:42:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:11,063 INFO L225 Difference]: With dead ends: 32691 [2021-06-05 16:42:11,063 INFO L226 Difference]: Without dead ends: 32679 [2021-06-05 16:42:11,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:42:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32679 states. [2021-06-05 16:42:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32679 to 25599. [2021-06-05 16:42:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25599 states, 25598 states have (on average 3.8770607078678023) internal successors, (99245), 25598 states have internal predecessors, (99245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25599 states to 25599 states and 99245 transitions. [2021-06-05 16:42:11,759 INFO L78 Accepts]: Start accepts. Automaton has 25599 states and 99245 transitions. Word has length 28 [2021-06-05 16:42:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:11,759 INFO L482 AbstractCegarLoop]: Abstraction has 25599 states and 99245 transitions. [2021-06-05 16:42:11,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 25599 states and 99245 transitions. [2021-06-05 16:42:11,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:11,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:11,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:11,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-06-05 16:42:11,996 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-05 16:42:11,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:11,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265030660] [2021-06-05 16:42:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:12,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265030660] [2021-06-05 16:42:12,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265030660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518191621] [2021-06-05 16:42:12,034 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:12,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:42:12,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:12,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:42:12,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:12,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518191621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:12,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:12,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:42:12,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172091473] [2021-06-05 16:42:12,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:42:12,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:12,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:42:12,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:42:12,114 INFO L87 Difference]: Start difference. First operand 25599 states and 99245 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:12,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:12,386 INFO L93 Difference]: Finished difference Result 30159 states and 114821 transitions. [2021-06-05 16:42:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:42:12,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-06-05 16:42:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:12,459 INFO L225 Difference]: With dead ends: 30159 [2021-06-05 16:42:12,460 INFO L226 Difference]: Without dead ends: 30159 [2021-06-05 16:42:12,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:42:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30159 states. [2021-06-05 16:42:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30159 to 26806. [2021-06-05 16:42:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26806 states, 26805 states have (on average 3.8731952993844434) internal successors, (103821), 26805 states have internal predecessors, (103821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26806 states to 26806 states and 103821 transitions. [2021-06-05 16:42:13,171 INFO L78 Accepts]: Start accepts. Automaton has 26806 states and 103821 transitions. Word has length 28 [2021-06-05 16:42:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:13,172 INFO L482 AbstractCegarLoop]: Abstraction has 26806 states and 103821 transitions. [2021-06-05 16:42:13,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 26806 states and 103821 transitions. [2021-06-05 16:42:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:13,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:13,214 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:13,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-06-05 16:42:13,414 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:13,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-05 16:42:13,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:13,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559999738] [2021-06-05 16:42:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:13,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:13,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559999738] [2021-06-05 16:42:13,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559999738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:13,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660762189] [2021-06-05 16:42:13,454 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:13,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:13,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:13,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:13,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:13,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660762189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:13,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:13,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:42:13,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815012950] [2021-06-05 16:42:13,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:13,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:13,560 INFO L87 Difference]: Start difference. First operand 26806 states and 103821 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:14,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:14,627 INFO L93 Difference]: Finished difference Result 34754 states and 129602 transitions. [2021-06-05 16:42:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:42:14,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 16:42:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:14,723 INFO L225 Difference]: With dead ends: 34754 [2021-06-05 16:42:14,723 INFO L226 Difference]: Without dead ends: 34754 [2021-06-05 16:42:14,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 464.2ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:42:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34754 states. [2021-06-05 16:42:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34754 to 28000. [2021-06-05 16:42:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28000 states, 27999 states have (on average 3.8443515839851425) internal successors, (107638), 27999 states have internal predecessors, (107638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28000 states to 28000 states and 107638 transitions. [2021-06-05 16:42:15,661 INFO L78 Accepts]: Start accepts. Automaton has 28000 states and 107638 transitions. Word has length 28 [2021-06-05 16:42:15,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:15,662 INFO L482 AbstractCegarLoop]: Abstraction has 28000 states and 107638 transitions. [2021-06-05 16:42:15,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:15,662 INFO L276 IsEmpty]: Start isEmpty. Operand 28000 states and 107638 transitions. [2021-06-05 16:42:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:15,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:15,706 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:15,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:15,906 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:15,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:15,907 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-05 16:42:15,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:15,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627992] [2021-06-05 16:42:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:15,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:15,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627992] [2021-06-05 16:42:15,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:15,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413629594] [2021-06-05 16:42:15,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:15,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:42:15,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:16,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413629594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:16,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:16,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:42:16,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226246030] [2021-06-05 16:42:16,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:16,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:16,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:16,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:16,026 INFO L87 Difference]: Start difference. First operand 28000 states and 107638 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) [2021-06-05 16:42:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:16,641 INFO L93 Difference]: Finished difference Result 33849 states and 127203 transitions. [2021-06-05 16:42:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:42:16,641 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 28 [2021-06-05 16:42:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:16,710 INFO L225 Difference]: With dead ends: 33849 [2021-06-05 16:42:16,710 INFO L226 Difference]: Without dead ends: 33841 [2021-06-05 16:42:16,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:42:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33841 states. [2021-06-05 16:42:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33841 to 27806. [2021-06-05 16:42:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27806 states, 27805 states have (on average 3.8502787268476895) internal successors, (107057), 27805 states have internal predecessors, (107057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27806 states to 27806 states and 107057 transitions. [2021-06-05 16:42:17,550 INFO L78 Accepts]: Start accepts. Automaton has 27806 states and 107057 transitions. Word has length 28 [2021-06-05 16:42:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:17,551 INFO L482 AbstractCegarLoop]: Abstraction has 27806 states and 107057 transitions. [2021-06-05 16:42:17,551 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) [2021-06-05 16:42:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 27806 states and 107057 transitions. [2021-06-05 16:42:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:17,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:17,599 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:17,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:17,799 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:17,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:17,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-05 16:42:17,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:17,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135764754] [2021-06-05 16:42:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:17,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:17,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135764754] [2021-06-05 16:42:17,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135764754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:17,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424938532] [2021-06-05 16:42:17,833 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:17,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:42:17,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:17,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:17,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:17,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424938532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:17,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:17,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:42:17,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334841491] [2021-06-05 16:42:17,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:17,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:17,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:17,924 INFO L87 Difference]: Start difference. First operand 27806 states and 107057 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) [2021-06-05 16:42:18,529 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 16:42:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:18,887 INFO L93 Difference]: Finished difference Result 35673 states and 132779 transitions. [2021-06-05 16:42:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:42:18,887 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 28 [2021-06-05 16:42:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:18,962 INFO L225 Difference]: With dead ends: 35673 [2021-06-05 16:42:18,962 INFO L226 Difference]: Without dead ends: 35673 [2021-06-05 16:42:18,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 582.4ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:42:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35673 states. [2021-06-05 16:42:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35673 to 28844. [2021-06-05 16:42:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28844 states, 28843 states have (on average 3.827618486287834) internal successors, (110400), 28843 states have internal predecessors, (110400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28844 states to 28844 states and 110400 transitions. [2021-06-05 16:42:19,774 INFO L78 Accepts]: Start accepts. Automaton has 28844 states and 110400 transitions. Word has length 28 [2021-06-05 16:42:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:19,775 INFO L482 AbstractCegarLoop]: Abstraction has 28844 states and 110400 transitions. [2021-06-05 16:42:19,775 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) [2021-06-05 16:42:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 28844 states and 110400 transitions. [2021-06-05 16:42:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:19,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:19,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:20,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:20,024 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:20,025 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-05 16:42:20,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:20,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161724200] [2021-06-05 16:42:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:20,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:20,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161724200] [2021-06-05 16:42:20,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161724200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:20,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707550256] [2021-06-05 16:42:20,063 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:20,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:42:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:20,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707550256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:20,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:20,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:42:20,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633006321] [2021-06-05 16:42:20,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:20,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:20,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:20,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:20,144 INFO L87 Difference]: Start difference. First operand 28844 states and 110400 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:20,615 INFO L93 Difference]: Finished difference Result 35179 states and 133683 transitions. [2021-06-05 16:42:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:42:20,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-05 16:42:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:20,706 INFO L225 Difference]: With dead ends: 35179 [2021-06-05 16:42:20,707 INFO L226 Difference]: Without dead ends: 35166 [2021-06-05 16:42:20,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:42:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35166 states. [2021-06-05 16:42:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35166 to 33639. [2021-06-05 16:42:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33639 states, 33638 states have (on average 3.8427968369106367) internal successors, (129264), 33638 states have internal predecessors, (129264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33639 states to 33639 states and 129264 transitions. [2021-06-05 16:42:21,622 INFO L78 Accepts]: Start accepts. Automaton has 33639 states and 129264 transitions. Word has length 28 [2021-06-05 16:42:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:21,622 INFO L482 AbstractCegarLoop]: Abstraction has 33639 states and 129264 transitions. [2021-06-05 16:42:21,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33639 states and 129264 transitions. [2021-06-05 16:42:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:21,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:21,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:21,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4050,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:21,873 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:21,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-05 16:42:21,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:21,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141414867] [2021-06-05 16:42:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:21,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:21,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141414867] [2021-06-05 16:42:21,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141414867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:21,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76362692] [2021-06-05 16:42:21,908 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:21,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:21,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:21,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:42:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:21,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76362692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:21,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:21,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:42:21,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501640111] [2021-06-05 16:42:21,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:21,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:21,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:21,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:21,986 INFO L87 Difference]: Start difference. First operand 33639 states and 129264 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:22,624 INFO L93 Difference]: Finished difference Result 36796 states and 139166 transitions. [2021-06-05 16:42:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:42:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-05 16:42:22,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:22,717 INFO L225 Difference]: With dead ends: 36796 [2021-06-05 16:42:22,717 INFO L226 Difference]: Without dead ends: 36796 [2021-06-05 16:42:22,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:42:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36796 states. [2021-06-05 16:42:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36796 to 33316. [2021-06-05 16:42:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33316 states, 33315 states have (on average 3.839021461803992) internal successors, (127897), 33315 states have internal predecessors, (127897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33316 states to 33316 states and 127897 transitions. [2021-06-05 16:42:23,623 INFO L78 Accepts]: Start accepts. Automaton has 33316 states and 127897 transitions. Word has length 28 [2021-06-05 16:42:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:23,623 INFO L482 AbstractCegarLoop]: Abstraction has 33316 states and 127897 transitions. [2021-06-05 16:42:23,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 33316 states and 127897 transitions. [2021-06-05 16:42:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:23,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:23,679 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:23,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-06-05 16:42:23,880 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-05 16:42:23,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:23,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108043300] [2021-06-05 16:42:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:23,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:23,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108043300] [2021-06-05 16:42:23,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108043300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:23,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127208508] [2021-06-05 16:42:23,913 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:23,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:42:23,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:23,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:24,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127208508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:24,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:24,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:42:24,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324487759] [2021-06-05 16:42:24,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:24,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:24,006 INFO L87 Difference]: Start difference. First operand 33316 states and 127897 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) [2021-06-05 16:42:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:24,647 INFO L93 Difference]: Finished difference Result 39856 states and 149676 transitions. [2021-06-05 16:42:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:42:24,648 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 28 [2021-06-05 16:42:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:24,747 INFO L225 Difference]: With dead ends: 39856 [2021-06-05 16:42:24,747 INFO L226 Difference]: Without dead ends: 39848 [2021-06-05 16:42:24,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:42:24,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2021-06-05 16:42:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 33282. [2021-06-05 16:42:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33282 states, 33281 states have (on average 3.839427901805835) internal successors, (127780), 33281 states have internal predecessors, (127780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33282 states to 33282 states and 127780 transitions. [2021-06-05 16:42:25,712 INFO L78 Accepts]: Start accepts. Automaton has 33282 states and 127780 transitions. Word has length 28 [2021-06-05 16:42:25,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:25,712 INFO L482 AbstractCegarLoop]: Abstraction has 33282 states and 127780 transitions. [2021-06-05 16:42:25,712 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) [2021-06-05 16:42:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 33282 states and 127780 transitions. [2021-06-05 16:42:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:25,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:25,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:25,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:25,969 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:25,969 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-05 16:42:25,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:25,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262545742] [2021-06-05 16:42:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:26,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:26,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262545742] [2021-06-05 16:42:26,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262545742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:26,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355309012] [2021-06-05 16:42:26,007 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:26,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:26,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:42:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:26,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355309012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:26,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:26,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:42:26,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612639646] [2021-06-05 16:42:26,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:42:26,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:26,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:42:26,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:42:26,090 INFO L87 Difference]: Start difference. First operand 33282 states and 127780 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:26,601 INFO L93 Difference]: Finished difference Result 36198 states and 137505 transitions. [2021-06-05 16:42:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:42:26,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-06-05 16:42:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:26,933 INFO L225 Difference]: With dead ends: 36198 [2021-06-05 16:42:26,933 INFO L226 Difference]: Without dead ends: 36198 [2021-06-05 16:42:26,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:42:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36198 states. [2021-06-05 16:42:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36198 to 33814. [2021-06-05 16:42:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 3.837695560878952) internal successors, (129764), 33813 states have internal predecessors, (129764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 129764 transitions. [2021-06-05 16:42:27,547 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 129764 transitions. Word has length 28 [2021-06-05 16:42:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:27,548 INFO L482 AbstractCegarLoop]: Abstraction has 33814 states and 129764 transitions. [2021-06-05 16:42:27,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 129764 transitions. [2021-06-05 16:42:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:27,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:27,602 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:27,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-05 16:42:27,803 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-05 16:42:27,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:27,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604955537] [2021-06-05 16:42:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:27,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:27,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604955537] [2021-06-05 16:42:27,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604955537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:27,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381058731] [2021-06-05 16:42:27,837 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:27,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:42:27,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:27,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:27,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:42:27,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381058731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:27,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:27,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:42:27,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019183626] [2021-06-05 16:42:27,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:27,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:27,926 INFO L87 Difference]: Start difference. First operand 33814 states and 129764 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) [2021-06-05 16:42:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:28,801 INFO L93 Difference]: Finished difference Result 40833 states and 153241 transitions. [2021-06-05 16:42:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:42:28,802 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 28 [2021-06-05 16:42:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:28,896 INFO L225 Difference]: With dead ends: 40833 [2021-06-05 16:42:28,896 INFO L226 Difference]: Without dead ends: 40809 [2021-06-05 16:42:28,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:42:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40809 states. [2021-06-05 16:42:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40809 to 33986. [2021-06-05 16:42:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33986 states, 33985 states have (on average 3.8339855818743565) internal successors, (130298), 33985 states have internal predecessors, (130298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33986 states to 33986 states and 130298 transitions. [2021-06-05 16:42:29,777 INFO L78 Accepts]: Start accepts. Automaton has 33986 states and 130298 transitions. Word has length 28 [2021-06-05 16:42:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:29,778 INFO L482 AbstractCegarLoop]: Abstraction has 33986 states and 130298 transitions. [2021-06-05 16:42:29,778 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) [2021-06-05 16:42:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 33986 states and 130298 transitions. [2021-06-05 16:42:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:29,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:29,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:30,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4054 [2021-06-05 16:42:30,030 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:30,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:30,030 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-05 16:42:30,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:30,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750611092] [2021-06-05 16:42:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:30,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:30,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750611092] [2021-06-05 16:42:30,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750611092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:30,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247839481] [2021-06-05 16:42:30,071 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:30,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:42:30,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:42:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:30,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247839481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:30,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:30,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 16:42:30,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542085941] [2021-06-05 16:42:30,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:42:30,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:30,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:42:30,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:42:30,153 INFO L87 Difference]: Start difference. First operand 33986 states and 130298 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:30,654 INFO L93 Difference]: Finished difference Result 36618 states and 138998 transitions. [2021-06-05 16:42:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:42:30,655 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-05 16:42:30,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:30,742 INFO L225 Difference]: With dead ends: 36618 [2021-06-05 16:42:30,742 INFO L226 Difference]: Without dead ends: 36618 [2021-06-05 16:42:30,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:42:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36618 states. [2021-06-05 16:42:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36618 to 33912. [2021-06-05 16:42:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33912 states, 33911 states have (on average 3.8348028663265605) internal successors, (130042), 33911 states have internal predecessors, (130042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33912 states to 33912 states and 130042 transitions. [2021-06-05 16:42:31,755 INFO L78 Accepts]: Start accepts. Automaton has 33912 states and 130042 transitions. Word has length 28 [2021-06-05 16:42:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:31,755 INFO L482 AbstractCegarLoop]: Abstraction has 33912 states and 130042 transitions. [2021-06-05 16:42:31,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 33912 states and 130042 transitions. [2021-06-05 16:42:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:31,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:31,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:32,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-06-05 16:42:32,017 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-05 16:42:32,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:32,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509148117] [2021-06-05 16:42:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:32,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509148117] [2021-06-05 16:42:32,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509148117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226984244] [2021-06-05 16:42:32,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:32,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226984244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:32,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:32,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:42:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440293354] [2021-06-05 16:42:32,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:32,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:32,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:32,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:32,152 INFO L87 Difference]: Start difference. First operand 33912 states and 130042 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:32,876 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 16:42:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:33,059 INFO L93 Difference]: Finished difference Result 40756 states and 152982 transitions. [2021-06-05 16:42:33,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:42:33,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 16:42:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:33,152 INFO L225 Difference]: With dead ends: 40756 [2021-06-05 16:42:33,152 INFO L226 Difference]: Without dead ends: 40716 [2021-06-05 16:42:33,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:42:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40716 states. [2021-06-05 16:42:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40716 to 34086. [2021-06-05 16:42:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34086 states, 34085 states have (on average 3.8309813701041513) internal successors, (130579), 34085 states have internal predecessors, (130579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34086 states to 34086 states and 130579 transitions. [2021-06-05 16:42:34,193 INFO L78 Accepts]: Start accepts. Automaton has 34086 states and 130579 transitions. Word has length 28 [2021-06-05 16:42:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:34,193 INFO L482 AbstractCegarLoop]: Abstraction has 34086 states and 130579 transitions. [2021-06-05 16:42:34,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 34086 states and 130579 transitions. [2021-06-05 16:42:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:34,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:34,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:34,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-05 16:42:34,449 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:34,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-05 16:42:34,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:34,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424155706] [2021-06-05 16:42:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:34,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:34,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424155706] [2021-06-05 16:42:34,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424155706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:34,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280521572] [2021-06-05 16:42:34,484 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:34,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:34,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:34,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:34,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280521572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:34,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:34,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:42:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121800848] [2021-06-05 16:42:34,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:42:34,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:42:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:42:34,624 INFO L87 Difference]: Start difference. First operand 34086 states and 130579 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:35,987 INFO L93 Difference]: Finished difference Result 76027 states and 281494 transitions. [2021-06-05 16:42:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:42:35,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:36,494 INFO L225 Difference]: With dead ends: 76027 [2021-06-05 16:42:36,494 INFO L226 Difference]: Without dead ends: 76027 [2021-06-05 16:42:36,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 714.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:42:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76027 states. [2021-06-05 16:42:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76027 to 43183. [2021-06-05 16:42:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43183 states, 43182 states have (on average 3.906581445972859) internal successors, (168694), 43182 states have internal predecessors, (168694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43183 states to 43183 states and 168694 transitions. [2021-06-05 16:42:38,022 INFO L78 Accepts]: Start accepts. Automaton has 43183 states and 168694 transitions. Word has length 28 [2021-06-05 16:42:38,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:38,022 INFO L482 AbstractCegarLoop]: Abstraction has 43183 states and 168694 transitions. [2021-06-05 16:42:38,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 43183 states and 168694 transitions. [2021-06-05 16:42:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:38,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:38,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:38,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-05 16:42:38,297 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-05 16:42:38,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:38,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122688716] [2021-06-05 16:42:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:38,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:38,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122688716] [2021-06-05 16:42:38,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122688716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:38,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081253099] [2021-06-05 16:42:38,335 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:38,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:42:38,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:38,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:38,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081253099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:38,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:38,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:42:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282171170] [2021-06-05 16:42:38,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:42:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:42:38,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:42:38,479 INFO L87 Difference]: Start difference. First operand 43183 states and 168694 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:39,689 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 16:42:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:40,110 INFO L93 Difference]: Finished difference Result 75388 states and 279801 transitions. [2021-06-05 16:42:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:42:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:40,310 INFO L225 Difference]: With dead ends: 75388 [2021-06-05 16:42:40,310 INFO L226 Difference]: Without dead ends: 75388 [2021-06-05 16:42:40,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 970.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:42:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75388 states. [2021-06-05 16:42:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75388 to 43180. [2021-06-05 16:42:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43180 states, 43179 states have (on average 3.906528636605757) internal successors, (168680), 43179 states have internal predecessors, (168680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43180 states to 43180 states and 168680 transitions. [2021-06-05 16:42:41,808 INFO L78 Accepts]: Start accepts. Automaton has 43180 states and 168680 transitions. Word has length 28 [2021-06-05 16:42:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:41,809 INFO L482 AbstractCegarLoop]: Abstraction has 43180 states and 168680 transitions. [2021-06-05 16:42:41,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 43180 states and 168680 transitions. [2021-06-05 16:42:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:41,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:41,871 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:42,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:42,073 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-05 16:42:42,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:42,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337716621] [2021-06-05 16:42:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:42,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:42,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337716621] [2021-06-05 16:42:42,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337716621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:42,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251264571] [2021-06-05 16:42:42,106 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:42,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:42,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:42,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251264571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:42,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:42,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:42:42,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526317441] [2021-06-05 16:42:42,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:42:42,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:42,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:42:42,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:42:42,476 INFO L87 Difference]: Start difference. First operand 43180 states and 168680 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:43,709 INFO L93 Difference]: Finished difference Result 69979 states and 261702 transitions. [2021-06-05 16:42:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:42:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 16:42:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:43,893 INFO L225 Difference]: With dead ends: 69979 [2021-06-05 16:42:43,894 INFO L226 Difference]: Without dead ends: 69979 [2021-06-05 16:42:43,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:42:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69979 states. [2021-06-05 16:42:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69979 to 43204. [2021-06-05 16:42:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9067657338610746) internal successors, (168784), 43203 states have internal predecessors, (168784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168784 transitions. [2021-06-05 16:42:45,607 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168784 transitions. Word has length 28 [2021-06-05 16:42:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:45,607 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168784 transitions. [2021-06-05 16:42:45,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168784 transitions. [2021-06-05 16:42:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:45,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:45,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:45,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:45,873 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-05 16:42:45,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:45,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885709735] [2021-06-05 16:42:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:45,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885709735] [2021-06-05 16:42:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885709735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177413526] [2021-06-05 16:42:45,906 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:45,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:42:45,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:45,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:45,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:46,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177413526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:46,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:46,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:42:46,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900707961] [2021-06-05 16:42:46,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:42:46,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:46,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:42:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:42:46,020 INFO L87 Difference]: Start difference. First operand 43204 states and 168784 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:47,110 INFO L93 Difference]: Finished difference Result 69094 states and 259411 transitions. [2021-06-05 16:42:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:42:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 16:42:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:47,308 INFO L225 Difference]: With dead ends: 69094 [2021-06-05 16:42:47,308 INFO L226 Difference]: Without dead ends: 69086 [2021-06-05 16:42:47,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 519.5ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:42:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69086 states. [2021-06-05 16:42:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69086 to 43204. [2021-06-05 16:42:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43204 states, 43203 states have (on average 3.9066268546165777) internal successors, (168778), 43203 states have internal predecessors, (168778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43204 states to 43204 states and 168778 transitions. [2021-06-05 16:42:49,036 INFO L78 Accepts]: Start accepts. Automaton has 43204 states and 168778 transitions. Word has length 28 [2021-06-05 16:42:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:49,036 INFO L482 AbstractCegarLoop]: Abstraction has 43204 states and 168778 transitions. [2021-06-05 16:42:49,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 43204 states and 168778 transitions. [2021-06-05 16:42:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:49,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:49,101 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:49,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:49,302 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-05 16:42:49,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:49,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872355778] [2021-06-05 16:42:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:49,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:49,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872355778] [2021-06-05 16:42:49,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872355778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:49,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092867744] [2021-06-05 16:42:49,335 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:49,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:42:49,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:49,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:49,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092867744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:49,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:49,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:42:49,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766164671] [2021-06-05 16:42:49,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:42:49,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:42:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:42:49,464 INFO L87 Difference]: Start difference. First operand 43204 states and 168778 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) [2021-06-05 16:42:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:50,977 INFO L93 Difference]: Finished difference Result 68768 states and 258526 transitions. [2021-06-05 16:42:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:42:50,978 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 28 [2021-06-05 16:42:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:51,204 INFO L225 Difference]: With dead ends: 68768 [2021-06-05 16:42:51,204 INFO L226 Difference]: Without dead ends: 68768 [2021-06-05 16:42:51,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:42:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68768 states. [2021-06-05 16:42:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68768 to 43212. [2021-06-05 16:42:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.9066904260489226) internal successors, (168812), 43211 states have internal predecessors, (168812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168812 transitions. [2021-06-05 16:42:52,671 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168812 transitions. Word has length 28 [2021-06-05 16:42:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:52,672 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168812 transitions. [2021-06-05 16:42:52,672 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) [2021-06-05 16:42:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168812 transitions. [2021-06-05 16:42:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:52,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:52,734 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:52,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-06-05 16:42:52,935 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:52,935 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-05 16:42:52,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:52,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766919469] [2021-06-05 16:42:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:52,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:52,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766919469] [2021-06-05 16:42:52,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766919469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:52,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572055605] [2021-06-05 16:42:52,994 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572055605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:53,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:53,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:42:53,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171287639] [2021-06-05 16:42:53,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:42:53,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:53,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:42:53,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:42:53,116 INFO L87 Difference]: Start difference. First operand 43212 states and 168812 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) [2021-06-05 16:42:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:54,622 INFO L93 Difference]: Finished difference Result 68557 states and 258000 transitions. [2021-06-05 16:42:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:42:54,637 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 28 [2021-06-05 16:42:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:54,829 INFO L225 Difference]: With dead ends: 68557 [2021-06-05 16:42:54,829 INFO L226 Difference]: Without dead ends: 68549 [2021-06-05 16:42:54,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:42:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68549 states. [2021-06-05 16:42:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68549 to 43212. [2021-06-05 16:42:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43212 states, 43211 states have (on average 3.906644141538034) internal successors, (168810), 43211 states have internal predecessors, (168810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43212 states to 43212 states and 168810 transitions. [2021-06-05 16:42:56,854 INFO L78 Accepts]: Start accepts. Automaton has 43212 states and 168810 transitions. Word has length 28 [2021-06-05 16:42:56,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:56,854 INFO L482 AbstractCegarLoop]: Abstraction has 43212 states and 168810 transitions. [2021-06-05 16:42:56,854 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) [2021-06-05 16:42:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 43212 states and 168810 transitions. [2021-06-05 16:42:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:56,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:56,933 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:57,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:57,154 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-05 16:42:57,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:57,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791283189] [2021-06-05 16:42:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:57,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:57,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791283189] [2021-06-05 16:42:57,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791283189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:57,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573016484] [2021-06-05 16:42:57,195 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:57,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:57,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:57,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:42:57,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:57,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573016484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:57,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:57,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:42:57,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347997810] [2021-06-05 16:42:57,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:42:57,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:57,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:42:57,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:42:57,329 INFO L87 Difference]: Start difference. First operand 43212 states and 168810 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:59,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:59,042 INFO L93 Difference]: Finished difference Result 67982 states and 254698 transitions. [2021-06-05 16:42:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:42:59,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:42:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:59,239 INFO L225 Difference]: With dead ends: 67982 [2021-06-05 16:42:59,239 INFO L226 Difference]: Without dead ends: 67982 [2021-06-05 16:42:59,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 694.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:42:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67982 states. [2021-06-05 16:43:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67982 to 46442. [2021-06-05 16:43:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46442 states, 46441 states have (on average 3.9102086518378156) internal successors, (181594), 46441 states have internal predecessors, (181594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46442 states to 46442 states and 181594 transitions. [2021-06-05 16:43:00,827 INFO L78 Accepts]: Start accepts. Automaton has 46442 states and 181594 transitions. Word has length 28 [2021-06-05 16:43:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:00,828 INFO L482 AbstractCegarLoop]: Abstraction has 46442 states and 181594 transitions. [2021-06-05 16:43:00,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:00,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46442 states and 181594 transitions. [2021-06-05 16:43:00,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:00,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:00,895 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:01,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-06-05 16:43:01,096 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:01,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-05 16:43:01,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:01,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089436842] [2021-06-05 16:43:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:01,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:01,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089436842] [2021-06-05 16:43:01,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089436842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:01,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620439589] [2021-06-05 16:43:01,130 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:01,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:43:01,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:01,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:01,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620439589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:01,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:01,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:43:01,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020714226] [2021-06-05 16:43:01,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:43:01,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:43:01,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:43:01,233 INFO L87 Difference]: Start difference. First operand 46442 states and 181594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:02,265 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 16:43:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:02,582 INFO L93 Difference]: Finished difference Result 67509 states and 253442 transitions. [2021-06-05 16:43:02,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:43:02,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:43:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:02,754 INFO L225 Difference]: With dead ends: 67509 [2021-06-05 16:43:02,754 INFO L226 Difference]: Without dead ends: 67501 [2021-06-05 16:43:02,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:43:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67501 states. [2021-06-05 16:43:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67501 to 46136. [2021-06-05 16:43:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46136 states, 46135 states have (on average 3.9156172103608973) internal successors, (180647), 46135 states have internal predecessors, (180647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46136 states to 46136 states and 180647 transitions. [2021-06-05 16:43:04,274 INFO L78 Accepts]: Start accepts. Automaton has 46136 states and 180647 transitions. Word has length 28 [2021-06-05 16:43:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:04,274 INFO L482 AbstractCegarLoop]: Abstraction has 46136 states and 180647 transitions. [2021-06-05 16:43:04,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 46136 states and 180647 transitions. [2021-06-05 16:43:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:04,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:04,344 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:04,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4064 [2021-06-05 16:43:04,545 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-05 16:43:04,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:04,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107909180] [2021-06-05 16:43:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:04,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:04,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107909180] [2021-06-05 16:43:04,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107909180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:04,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251814183] [2021-06-05 16:43:04,581 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:04,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:43:04,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:04,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:04,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251814183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:04,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:04,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:43:04,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539184745] [2021-06-05 16:43:04,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:43:04,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:04,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:43:04,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:43:04,682 INFO L87 Difference]: Start difference. First operand 46136 states and 180647 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:05,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:05,920 INFO L93 Difference]: Finished difference Result 65985 states and 249225 transitions. [2021-06-05 16:43:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:43:05,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 16:43:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:06,097 INFO L225 Difference]: With dead ends: 65985 [2021-06-05 16:43:06,097 INFO L226 Difference]: Without dead ends: 65961 [2021-06-05 16:43:06,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:43:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65961 states. [2021-06-05 16:43:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65961 to 46032. [2021-06-05 16:43:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46032 states, 46031 states have (on average 3.915600356281636) internal successors, (180239), 46031 states have internal predecessors, (180239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46032 states to 46032 states and 180239 transitions. [2021-06-05 16:43:07,610 INFO L78 Accepts]: Start accepts. Automaton has 46032 states and 180239 transitions. Word has length 28 [2021-06-05 16:43:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:07,610 INFO L482 AbstractCegarLoop]: Abstraction has 46032 states and 180239 transitions. [2021-06-05 16:43:07,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 46032 states and 180239 transitions. [2021-06-05 16:43:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:07,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:07,677 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:07,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4065,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:07,878 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:07,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-05 16:43:07,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:07,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707739695] [2021-06-05 16:43:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:43:07,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:07,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707739695] [2021-06-05 16:43:07,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707739695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:07,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505712568] [2021-06-05 16:43:07,913 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:07,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:43:07,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:07,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:08,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505712568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:08,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:08,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:43:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862433905] [2021-06-05 16:43:08,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:43:08,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:43:08,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:43:08,041 INFO L87 Difference]: Start difference. First operand 46032 states and 180239 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) [2021-06-05 16:43:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:09,489 INFO L93 Difference]: Finished difference Result 67202 states and 252555 transitions. [2021-06-05 16:43:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:43:09,490 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 28 [2021-06-05 16:43:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:09,673 INFO L225 Difference]: With dead ends: 67202 [2021-06-05 16:43:09,673 INFO L226 Difference]: Without dead ends: 67202 [2021-06-05 16:43:09,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:43:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67202 states. [2021-06-05 16:43:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67202 to 46128. [2021-06-05 16:43:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46128 states, 46127 states have (on average 3.9142584603377633) internal successors, (180553), 46127 states have internal predecessors, (180553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46128 states to 46128 states and 180553 transitions. [2021-06-05 16:43:11,086 INFO L78 Accepts]: Start accepts. Automaton has 46128 states and 180553 transitions. Word has length 28 [2021-06-05 16:43:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:11,086 INFO L482 AbstractCegarLoop]: Abstraction has 46128 states and 180553 transitions. [2021-06-05 16:43:11,086 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) [2021-06-05 16:43:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 46128 states and 180553 transitions. [2021-06-05 16:43:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:11,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:11,458 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:11,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-05 16:43:11,658 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:11,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-05 16:43:11,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:11,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710362747] [2021-06-05 16:43:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:43:11,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710362747] [2021-06-05 16:43:11,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710362747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:11,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098399865] [2021-06-05 16:43:11,696 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:11,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:43:11,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:11,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:11,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:11,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098399865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:11,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:11,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:43:11,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693757571] [2021-06-05 16:43:11,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:43:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:43:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:43:11,827 INFO L87 Difference]: Start difference. First operand 46128 states and 180553 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) [2021-06-05 16:43:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:12,891 INFO L93 Difference]: Finished difference Result 66883 states and 251651 transitions. [2021-06-05 16:43:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:43:12,892 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 28 [2021-06-05 16:43:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:13,062 INFO L225 Difference]: With dead ends: 66883 [2021-06-05 16:43:13,062 INFO L226 Difference]: Without dead ends: 66875 [2021-06-05 16:43:13,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:43:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66875 states. [2021-06-05 16:43:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66875 to 46060. [2021-06-05 16:43:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46060 states, 46059 states have (on average 3.9154345513363293) internal successors, (180341), 46059 states have internal predecessors, (180341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46060 states to 46060 states and 180341 transitions. [2021-06-05 16:43:14,491 INFO L78 Accepts]: Start accepts. Automaton has 46060 states and 180341 transitions. Word has length 28 [2021-06-05 16:43:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:14,491 INFO L482 AbstractCegarLoop]: Abstraction has 46060 states and 180341 transitions. [2021-06-05 16:43:14,491 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) [2021-06-05 16:43:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 46060 states and 180341 transitions. [2021-06-05 16:43:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:14,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:14,750 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:14,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-05 16:43:14,950 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-05 16:43:14,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:14,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118948901] [2021-06-05 16:43:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:43:14,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:14,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118948901] [2021-06-05 16:43:14,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118948901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:14,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524870255] [2021-06-05 16:43:14,993 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:15,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:15,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:15,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524870255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:15,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:15,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:43:15,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556347605] [2021-06-05 16:43:15,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:43:15,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:15,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:43:15,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:43:15,104 INFO L87 Difference]: Start difference. First operand 46060 states and 180341 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:16,006 INFO L93 Difference]: Finished difference Result 65614 states and 248140 transitions. [2021-06-05 16:43:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:43:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 16:43:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:16,182 INFO L225 Difference]: With dead ends: 65614 [2021-06-05 16:43:16,183 INFO L226 Difference]: Without dead ends: 65590 [2021-06-05 16:43:16,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 378.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:43:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65590 states. [2021-06-05 16:43:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65590 to 46036. [2021-06-05 16:43:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46036 states, 46035 states have (on average 3.915564244596503) internal successors, (180253), 46035 states have internal predecessors, (180253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46036 states to 46036 states and 180253 transitions. [2021-06-05 16:43:17,970 INFO L78 Accepts]: Start accepts. Automaton has 46036 states and 180253 transitions. Word has length 28 [2021-06-05 16:43:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:17,970 INFO L482 AbstractCegarLoop]: Abstraction has 46036 states and 180253 transitions. [2021-06-05 16:43:17,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 46036 states and 180253 transitions. [2021-06-05 16:43:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:18,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:18,064 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:18,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-06-05 16:43:18,265 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:18,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-05 16:43:18,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:18,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965235144] [2021-06-05 16:43:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:18,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:18,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965235144] [2021-06-05 16:43:18,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965235144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:18,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266820256] [2021-06-05 16:43:18,310 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:18,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:43:18,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:18,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266820256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:18,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:18,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:43:18,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686069018] [2021-06-05 16:43:18,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:43:18,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:43:18,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:43:18,419 INFO L87 Difference]: Start difference. First operand 46036 states and 180253 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:20,007 INFO L93 Difference]: Finished difference Result 68913 states and 257576 transitions. [2021-06-05 16:43:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 16:43:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:43:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:20,192 INFO L225 Difference]: With dead ends: 68913 [2021-06-05 16:43:20,192 INFO L226 Difference]: Without dead ends: 68913 [2021-06-05 16:43:20,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 913.4ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 16:43:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68913 states. [2021-06-05 16:43:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68913 to 50828. [2021-06-05 16:43:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50828 states, 50827 states have (on average 3.8652881342593504) internal successors, (196461), 50827 states have internal predecessors, (196461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50828 states to 50828 states and 196461 transitions. [2021-06-05 16:43:21,916 INFO L78 Accepts]: Start accepts. Automaton has 50828 states and 196461 transitions. Word has length 28 [2021-06-05 16:43:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:21,916 INFO L482 AbstractCegarLoop]: Abstraction has 50828 states and 196461 transitions. [2021-06-05 16:43:21,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 50828 states and 196461 transitions. [2021-06-05 16:43:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:21,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:21,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:22,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:22,195 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:22,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:22,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-05 16:43:22,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:22,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927390276] [2021-06-05 16:43:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:22,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:22,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927390276] [2021-06-05 16:43:22,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927390276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:22,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432522545] [2021-06-05 16:43:22,236 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:22,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:43:22,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:22,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432522545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:22,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:22,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:43:22,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21504040] [2021-06-05 16:43:22,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:43:22,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:22,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:43:22,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:43:22,330 INFO L87 Difference]: Start difference. First operand 50828 states and 196461 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:23,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:23,981 INFO L93 Difference]: Finished difference Result 68143 states and 255462 transitions. [2021-06-05 16:43:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:43:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:43:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:24,248 INFO L225 Difference]: With dead ends: 68143 [2021-06-05 16:43:24,248 INFO L226 Difference]: Without dead ends: 68135 [2021-06-05 16:43:24,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:43:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68135 states. [2021-06-05 16:43:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68135 to 49664. [2021-06-05 16:43:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49664 states, 49663 states have (on average 3.8827900046312145) internal successors, (192831), 49663 states have internal predecessors, (192831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49664 states to 49664 states and 192831 transitions. [2021-06-05 16:43:25,808 INFO L78 Accepts]: Start accepts. Automaton has 49664 states and 192831 transitions. Word has length 28 [2021-06-05 16:43:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:25,809 INFO L482 AbstractCegarLoop]: Abstraction has 49664 states and 192831 transitions. [2021-06-05 16:43:25,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 49664 states and 192831 transitions. [2021-06-05 16:43:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:25,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:25,881 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:26,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-06-05 16:43:26,081 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-05 16:43:26,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:26,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939189231] [2021-06-05 16:43:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:26,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:26,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939189231] [2021-06-05 16:43:26,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939189231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:26,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050582212] [2021-06-05 16:43:26,122 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:26,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:43:26,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:26,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050582212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:26,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:26,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:43:26,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704278505] [2021-06-05 16:43:26,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:43:26,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:43:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:43:26,215 INFO L87 Difference]: Start difference. First operand 49664 states and 192831 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:27,778 INFO L93 Difference]: Finished difference Result 66443 states and 250710 transitions. [2021-06-05 16:43:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:43:27,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:43:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:27,949 INFO L225 Difference]: With dead ends: 66443 [2021-06-05 16:43:27,949 INFO L226 Difference]: Without dead ends: 66419 [2021-06-05 16:43:27,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:43:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66419 states. [2021-06-05 16:43:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66419 to 49644. [2021-06-05 16:43:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49644 states, 49643 states have (on average 3.8810507020123683) internal successors, (192667), 49643 states have internal predecessors, (192667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49644 states to 49644 states and 192667 transitions. [2021-06-05 16:43:29,515 INFO L78 Accepts]: Start accepts. Automaton has 49644 states and 192667 transitions. Word has length 28 [2021-06-05 16:43:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:29,515 INFO L482 AbstractCegarLoop]: Abstraction has 49644 states and 192667 transitions. [2021-06-05 16:43:29,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 49644 states and 192667 transitions. [2021-06-05 16:43:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:29,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:29,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:29,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:29,796 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:29,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-05 16:43:29,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:29,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95712228] [2021-06-05 16:43:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:29,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:29,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95712228] [2021-06-05 16:43:29,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95712228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:29,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588604358] [2021-06-05 16:43:29,838 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:29,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:43:29,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:29,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588604358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:29,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:29,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:43:29,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172323257] [2021-06-05 16:43:29,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:43:29,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:29,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:43:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:43:29,935 INFO L87 Difference]: Start difference. First operand 49644 states and 192667 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:31,401 INFO L93 Difference]: Finished difference Result 67813 states and 254591 transitions. [2021-06-05 16:43:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:43:31,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:43:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:31,568 INFO L225 Difference]: With dead ends: 67813 [2021-06-05 16:43:31,568 INFO L226 Difference]: Without dead ends: 67773 [2021-06-05 16:43:31,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 559.6ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:43:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67773 states. [2021-06-05 16:43:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67773 to 49798. [2021-06-05 16:43:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49798 states, 49797 states have (on average 3.880394401269153) internal successors, (193232), 49797 states have internal predecessors, (193232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 193232 transitions. [2021-06-05 16:43:33,096 INFO L78 Accepts]: Start accepts. Automaton has 49798 states and 193232 transitions. Word has length 28 [2021-06-05 16:43:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:33,096 INFO L482 AbstractCegarLoop]: Abstraction has 49798 states and 193232 transitions. [2021-06-05 16:43:33,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 49798 states and 193232 transitions. [2021-06-05 16:43:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:33,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:33,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:33,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-06-05 16:43:33,373 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:33,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-05 16:43:33,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:33,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728059891] [2021-06-05 16:43:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:33,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:33,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728059891] [2021-06-05 16:43:33,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728059891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:33,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579207917] [2021-06-05 16:43:33,423 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:33,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:43:33,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:33,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:33,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579207917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:33,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:33,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:43:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043819402] [2021-06-05 16:43:33,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:43:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:43:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:43:33,558 INFO L87 Difference]: Start difference. First operand 49798 states and 193232 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:34,814 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 16:43:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:35,389 INFO L93 Difference]: Finished difference Result 66932 states and 251929 transitions. [2021-06-05 16:43:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:43:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-05 16:43:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:35,580 INFO L225 Difference]: With dead ends: 66932 [2021-06-05 16:43:35,580 INFO L226 Difference]: Without dead ends: 66932 [2021-06-05 16:43:35,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1180.0ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:43:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66932 states. [2021-06-05 16:43:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66932 to 50703. [2021-06-05 16:43:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50703 states, 50702 states have (on average 3.871701313557651) internal successors, (196303), 50702 states have internal predecessors, (196303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50703 states to 50703 states and 196303 transitions. [2021-06-05 16:43:37,122 INFO L78 Accepts]: Start accepts. Automaton has 50703 states and 196303 transitions. Word has length 28 [2021-06-05 16:43:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:37,122 INFO L482 AbstractCegarLoop]: Abstraction has 50703 states and 196303 transitions. [2021-06-05 16:43:37,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 50703 states and 196303 transitions. [2021-06-05 16:43:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:37,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:37,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:37,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:37,404 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-05 16:43:37,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:37,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334942981] [2021-06-05 16:43:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:37,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:37,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334942981] [2021-06-05 16:43:37,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334942981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:37,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581803488] [2021-06-05 16:43:37,455 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:37,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:37,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581803488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:37,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:37,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:43:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646781553] [2021-06-05 16:43:37,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:43:37,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:37,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:43:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:43:37,582 INFO L87 Difference]: Start difference. First operand 50703 states and 196303 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:39,252 INFO L93 Difference]: Finished difference Result 66428 states and 250518 transitions. [2021-06-05 16:43:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:43:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-05 16:43:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:39,438 INFO L225 Difference]: With dead ends: 66428 [2021-06-05 16:43:39,438 INFO L226 Difference]: Without dead ends: 66420 [2021-06-05 16:43:39,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:43:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66420 states. [2021-06-05 16:43:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66420 to 50627. [2021-06-05 16:43:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50627 states, 50626 states have (on average 3.8728518942835697) internal successors, (196067), 50626 states have internal predecessors, (196067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50627 states to 50627 states and 196067 transitions. [2021-06-05 16:43:41,226 INFO L78 Accepts]: Start accepts. Automaton has 50627 states and 196067 transitions. Word has length 28 [2021-06-05 16:43:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:41,226 INFO L482 AbstractCegarLoop]: Abstraction has 50627 states and 196067 transitions. [2021-06-05 16:43:41,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 50627 states and 196067 transitions. [2021-06-05 16:43:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:41,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:41,601 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:41,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-06-05 16:43:41,824 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:41,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-05 16:43:41,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:41,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887075421] [2021-06-05 16:43:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:41,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887075421] [2021-06-05 16:43:41,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887075421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:41,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032580636] [2021-06-05 16:43:41,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:41,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:43:41,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:41,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:41,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:41,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032580636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:41,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:41,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:43:41,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504878498] [2021-06-05 16:43:41,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:43:41,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:43:41,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:43:41,980 INFO L87 Difference]: Start difference. First operand 50627 states and 196067 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:43,144 INFO L93 Difference]: Finished difference Result 65905 states and 249272 transitions. [2021-06-05 16:43:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:43:43,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 16:43:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:43,313 INFO L225 Difference]: With dead ends: 65905 [2021-06-05 16:43:43,313 INFO L226 Difference]: Without dead ends: 65881 [2021-06-05 16:43:43,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:43:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65881 states. [2021-06-05 16:43:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65881 to 50613. [2021-06-05 16:43:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50613 states, 50612 states have (on average 3.872836481466846) internal successors, (196012), 50612 states have internal predecessors, (196012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50613 states to 50613 states and 196012 transitions. [2021-06-05 16:43:45,114 INFO L78 Accepts]: Start accepts. Automaton has 50613 states and 196012 transitions. Word has length 28 [2021-06-05 16:43:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:45,115 INFO L482 AbstractCegarLoop]: Abstraction has 50613 states and 196012 transitions. [2021-06-05 16:43:45,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 50613 states and 196012 transitions. [2021-06-05 16:43:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:45,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:45,193 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:45,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4075,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:45,394 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:45,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-05 16:43:45,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:45,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235238014] [2021-06-05 16:43:45,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:45,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:45,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235238014] [2021-06-05 16:43:45,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235238014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:45,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168327011] [2021-06-05 16:43:45,438 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:45,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:43:45,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:45,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:45,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168327011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:45,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:45,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:43:45,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864987331] [2021-06-05 16:43:45,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:43:45,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:43:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:43:45,544 INFO L87 Difference]: Start difference. First operand 50613 states and 196012 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:46,646 INFO L93 Difference]: Finished difference Result 65687 states and 248579 transitions. [2021-06-05 16:43:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:43:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-06-05 16:43:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:46,816 INFO L225 Difference]: With dead ends: 65687 [2021-06-05 16:43:46,816 INFO L226 Difference]: Without dead ends: 65647 [2021-06-05 16:43:46,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:43:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65647 states. [2021-06-05 16:43:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65647 to 50962. [2021-06-05 16:43:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 3.874354898844214) internal successors, (197441), 50961 states have internal predecessors, (197441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 197441 transitions. [2021-06-05 16:43:48,648 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 197441 transitions. Word has length 28 [2021-06-05 16:43:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:48,648 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 197441 transitions. [2021-06-05 16:43:48,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 197441 transitions. [2021-06-05 16:43:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:48,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:48,724 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:48,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-06-05 16:43:48,924 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-05 16:43:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402927995] [2021-06-05 16:43:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:48,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:48,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402927995] [2021-06-05 16:43:48,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402927995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:48,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729243464] [2021-06-05 16:43:48,965 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:48,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:43:48,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:48,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:48,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:49,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729243464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:49,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:49,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:43:49,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330359506] [2021-06-05 16:43:49,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:43:49,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:49,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:43:49,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:43:49,085 INFO L87 Difference]: Start difference. First operand 50962 states and 197441 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:50,433 INFO L93 Difference]: Finished difference Result 79769 states and 298419 transitions. [2021-06-05 16:43:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:43:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:43:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:50,981 INFO L225 Difference]: With dead ends: 79769 [2021-06-05 16:43:50,981 INFO L226 Difference]: Without dead ends: 79769 [2021-06-05 16:43:50,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:43:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79769 states. [2021-06-05 16:43:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79769 to 52128. [2021-06-05 16:43:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52128 states, 52127 states have (on average 3.8865846873980856) internal successors, (202596), 52127 states have internal predecessors, (202596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52128 states to 52128 states and 202596 transitions. [2021-06-05 16:43:52,450 INFO L78 Accepts]: Start accepts. Automaton has 52128 states and 202596 transitions. Word has length 28 [2021-06-05 16:43:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:52,450 INFO L482 AbstractCegarLoop]: Abstraction has 52128 states and 202596 transitions. [2021-06-05 16:43:52,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 52128 states and 202596 transitions. [2021-06-05 16:43:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:52,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:52,529 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:52,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-06-05 16:43:52,729 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:52,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-05 16:43:52,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:52,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632453486] [2021-06-05 16:43:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:52,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:52,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632453486] [2021-06-05 16:43:52,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632453486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:52,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468048004] [2021-06-05 16:43:52,770 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:52,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:43:52,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:52,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:52,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:52,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468048004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:52,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:52,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:43:52,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339184224] [2021-06-05 16:43:52,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:43:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:43:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:43:52,896 INFO L87 Difference]: Start difference. First operand 52128 states and 202596 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:54,466 INFO L93 Difference]: Finished difference Result 72910 states and 276752 transitions. [2021-06-05 16:43:54,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:43:54,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 16:43:54,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:54,692 INFO L225 Difference]: With dead ends: 72910 [2021-06-05 16:43:54,693 INFO L226 Difference]: Without dead ends: 72910 [2021-06-05 16:43:54,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:43:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72910 states. [2021-06-05 16:43:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72910 to 52158. [2021-06-05 16:43:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52158 states, 52157 states have (on average 3.886400674885442) internal successors, (202703), 52157 states have internal predecessors, (202703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52158 states to 52158 states and 202703 transitions. [2021-06-05 16:43:56,376 INFO L78 Accepts]: Start accepts. Automaton has 52158 states and 202703 transitions. Word has length 28 [2021-06-05 16:43:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:56,376 INFO L482 AbstractCegarLoop]: Abstraction has 52158 states and 202703 transitions. [2021-06-05 16:43:56,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 52158 states and 202703 transitions. [2021-06-05 16:43:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:43:56,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:56,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:56,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-06-05 16:43:56,657 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:56,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-05 16:43:56,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:56,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987404683] [2021-06-05 16:43:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:56,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:56,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987404683] [2021-06-05 16:43:56,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987404683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:56,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121159824] [2021-06-05 16:43:56,697 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:56,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:43:56,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:56,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:43:56,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:56,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121159824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:56,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:56,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:43:56,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085915677] [2021-06-05 16:43:56,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:43:56,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:56,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:43:56,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:43:56,830 INFO L87 Difference]: Start difference. First operand 52158 states and 202703 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:58,793 INFO L93 Difference]: Finished difference Result 73768 states and 279188 transitions. [2021-06-05 16:43:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:43:58,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-05 16:43:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:58,987 INFO L225 Difference]: With dead ends: 73768 [2021-06-05 16:43:58,987 INFO L226 Difference]: Without dead ends: 73768 [2021-06-05 16:43:58,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1255.1ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:43:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73768 states. [2021-06-05 16:44:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73768 to 52422. [2021-06-05 16:44:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52422 states, 52421 states have (on average 3.8831956658591023) internal successors, (203561), 52421 states have internal predecessors, (203561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:00,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52422 states to 52422 states and 203561 transitions. [2021-06-05 16:44:00,625 INFO L78 Accepts]: Start accepts. Automaton has 52422 states and 203561 transitions. Word has length 28 [2021-06-05 16:44:00,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:00,625 INFO L482 AbstractCegarLoop]: Abstraction has 52422 states and 203561 transitions. [2021-06-05 16:44:00,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:00,625 INFO L276 IsEmpty]: Start isEmpty. Operand 52422 states and 203561 transitions. [2021-06-05 16:44:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:00,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:00,707 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:00,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-06-05 16:44:00,907 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-05 16:44:00,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:00,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176954775] [2021-06-05 16:44:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:01,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:01,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176954775] [2021-06-05 16:44:01,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176954775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:01,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49125672] [2021-06-05 16:44:01,246 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:44:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:01,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49125672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:01,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:01,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:44:01,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590909897] [2021-06-05 16:44:01,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:44:01,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:44:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:44:01,392 INFO L87 Difference]: Start difference. First operand 52422 states and 203561 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:02,786 INFO L93 Difference]: Finished difference Result 72980 states and 276953 transitions. [2021-06-05 16:44:02,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:44:02,787 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 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 28 [2021-06-05 16:44:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:02,976 INFO L225 Difference]: With dead ends: 72980 [2021-06-05 16:44:02,976 INFO L226 Difference]: Without dead ends: 72976 [2021-06-05 16:44:02,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 779.3ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:44:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72976 states. [2021-06-05 16:44:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72976 to 52058. [2021-06-05 16:44:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52058 states, 52057 states have (on average 3.8866050675221393) internal successors, (202325), 52057 states have internal predecessors, (202325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52058 states to 52058 states and 202325 transitions. [2021-06-05 16:44:04,752 INFO L78 Accepts]: Start accepts. Automaton has 52058 states and 202325 transitions. Word has length 28 [2021-06-05 16:44:04,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:04,753 INFO L482 AbstractCegarLoop]: Abstraction has 52058 states and 202325 transitions. [2021-06-05 16:44:04,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand 52058 states and 202325 transitions. [2021-06-05 16:44:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:04,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:04,830 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:05,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4080 [2021-06-05 16:44:05,031 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:05,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-05 16:44:05,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:05,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367995272] [2021-06-05 16:44:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:05,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:05,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367995272] [2021-06-05 16:44:05,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367995272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:05,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96271278] [2021-06-05 16:44:05,071 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:05,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:44:05,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96271278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:05,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:05,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:44:05,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200577367] [2021-06-05 16:44:05,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:44:05,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:05,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:44:05,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:44:05,191 INFO L87 Difference]: Start difference. First operand 52058 states and 202325 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:06,169 INFO L93 Difference]: Finished difference Result 66943 states and 255942 transitions. [2021-06-05 16:44:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:44:06,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 16:44:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:06,354 INFO L225 Difference]: With dead ends: 66943 [2021-06-05 16:44:06,355 INFO L226 Difference]: Without dead ends: 66943 [2021-06-05 16:44:06,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 500.7ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:44:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66943 states. [2021-06-05 16:44:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66943 to 52074. [2021-06-05 16:44:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52074 states, 52073 states have (on average 3.8882530294010333) internal successors, (202473), 52073 states have internal predecessors, (202473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:08,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52074 states to 52074 states and 202473 transitions. [2021-06-05 16:44:08,331 INFO L78 Accepts]: Start accepts. Automaton has 52074 states and 202473 transitions. Word has length 28 [2021-06-05 16:44:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:08,331 INFO L482 AbstractCegarLoop]: Abstraction has 52074 states and 202473 transitions. [2021-06-05 16:44:08,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 52074 states and 202473 transitions. [2021-06-05 16:44:08,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:08,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:08,410 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:08,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:08,610 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:08,611 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-05 16:44:08,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:08,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605617420] [2021-06-05 16:44:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:08,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:08,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605617420] [2021-06-05 16:44:08,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605617420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:08,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965618707] [2021-06-05 16:44:08,651 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:08,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:44:08,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:08,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:44:08,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:08,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965618707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:08,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:08,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:44:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69765953] [2021-06-05 16:44:08,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:44:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:44:08,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:44:08,774 INFO L87 Difference]: Start difference. First operand 52074 states and 202473 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:09,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:09,624 INFO L93 Difference]: Finished difference Result 66257 states and 254067 transitions. [2021-06-05 16:44:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:44:09,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 16:44:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:09,802 INFO L225 Difference]: With dead ends: 66257 [2021-06-05 16:44:09,802 INFO L226 Difference]: Without dead ends: 66245 [2021-06-05 16:44:09,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:44:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66245 states. [2021-06-05 16:44:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66245 to 52008. [2021-06-05 16:44:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52008 states, 52007 states have (on average 3.889284134828004) internal successors, (202270), 52007 states have internal predecessors, (202270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52008 states to 52008 states and 202270 transitions. [2021-06-05 16:44:11,736 INFO L78 Accepts]: Start accepts. Automaton has 52008 states and 202270 transitions. Word has length 28 [2021-06-05 16:44:11,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:11,736 INFO L482 AbstractCegarLoop]: Abstraction has 52008 states and 202270 transitions. [2021-06-05 16:44:11,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 52008 states and 202270 transitions. [2021-06-05 16:44:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:11,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:11,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:12,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-06-05 16:44:12,014 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-05 16:44:12,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:12,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304927123] [2021-06-05 16:44:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:12,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:12,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304927123] [2021-06-05 16:44:12,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304927123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:12,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563704677] [2021-06-05 16:44:12,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:12,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:12,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:44:12,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:12,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563704677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:12,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:12,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:44:12,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833780404] [2021-06-05 16:44:12,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:44:12,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:12,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:44:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:44:12,178 INFO L87 Difference]: Start difference. First operand 52008 states and 202270 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:12,894 INFO L93 Difference]: Finished difference Result 56548 states and 217322 transitions. [2021-06-05 16:44:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:44:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 16:44:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:13,042 INFO L225 Difference]: With dead ends: 56548 [2021-06-05 16:44:13,042 INFO L226 Difference]: Without dead ends: 56548 [2021-06-05 16:44:13,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:44:13,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56548 states. [2021-06-05 16:44:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56548 to 52216. [2021-06-05 16:44:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52216 states, 52215 states have (on average 3.8870439528871015) internal successors, (202962), 52215 states have internal predecessors, (202962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52216 states to 52216 states and 202962 transitions. [2021-06-05 16:44:14,498 INFO L78 Accepts]: Start accepts. Automaton has 52216 states and 202962 transitions. Word has length 28 [2021-06-05 16:44:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:14,498 INFO L482 AbstractCegarLoop]: Abstraction has 52216 states and 202962 transitions. [2021-06-05 16:44:14,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52216 states and 202962 transitions. [2021-06-05 16:44:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:14,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:14,934 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:15,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4083,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:15,149 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-05 16:44:15,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:15,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729615160] [2021-06-05 16:44:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:15,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:15,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729615160] [2021-06-05 16:44:15,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729615160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:15,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666016541] [2021-06-05 16:44:15,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:15,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:44:15,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:15,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:44:15,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:15,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666016541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:15,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:15,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:44:15,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345860428] [2021-06-05 16:44:15,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:44:15,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:15,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:44:15,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:44:15,303 INFO L87 Difference]: Start difference. First operand 52216 states and 202962 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:15,976 INFO L93 Difference]: Finished difference Result 56395 states and 216924 transitions. [2021-06-05 16:44:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:44:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-05 16:44:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:16,123 INFO L225 Difference]: With dead ends: 56395 [2021-06-05 16:44:16,124 INFO L226 Difference]: Without dead ends: 56391 [2021-06-05 16:44:16,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:44:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56391 states. [2021-06-05 16:44:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56391 to 52156. [2021-06-05 16:44:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52156 states, 52155 states have (on average 3.887834339948231) internal successors, (202770), 52155 states have internal predecessors, (202770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52156 states to 52156 states and 202770 transitions. [2021-06-05 16:44:17,499 INFO L78 Accepts]: Start accepts. Automaton has 52156 states and 202770 transitions. Word has length 28 [2021-06-05 16:44:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:17,499 INFO L482 AbstractCegarLoop]: Abstraction has 52156 states and 202770 transitions. [2021-06-05 16:44:17,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 52156 states and 202770 transitions. [2021-06-05 16:44:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:17,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:17,579 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:17,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4084 [2021-06-05 16:44:17,779 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:17,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:17,779 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 80 times [2021-06-05 16:44:17,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:17,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622584143] [2021-06-05 16:44:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:17,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:17,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622584143] [2021-06-05 16:44:17,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622584143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:17,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944065130] [2021-06-05 16:44:17,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:17,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:17,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:17,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:44:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:17,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944065130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:17,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:17,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:44:17,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472371677] [2021-06-05 16:44:17,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:44:17,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:17,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:44:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:44:17,924 INFO L87 Difference]: Start difference. First operand 52156 states and 202770 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) [2021-06-05 16:44:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:18,774 INFO L93 Difference]: Finished difference Result 56442 states and 217026 transitions. [2021-06-05 16:44:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:44:18,775 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 28 [2021-06-05 16:44:18,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:18,922 INFO L225 Difference]: With dead ends: 56442 [2021-06-05 16:44:18,922 INFO L226 Difference]: Without dead ends: 56442 [2021-06-05 16:44:18,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:44:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56442 states. [2021-06-05 16:44:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56442 to 52260. [2021-06-05 16:44:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52260 states, 52259 states have (on average 3.88629709715073) internal successors, (203094), 52259 states have internal predecessors, (203094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52260 states to 52260 states and 203094 transitions. [2021-06-05 16:44:20,321 INFO L78 Accepts]: Start accepts. Automaton has 52260 states and 203094 transitions. Word has length 28 [2021-06-05 16:44:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:20,321 INFO L482 AbstractCegarLoop]: Abstraction has 52260 states and 203094 transitions. [2021-06-05 16:44:20,321 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) [2021-06-05 16:44:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 52260 states and 203094 transitions. [2021-06-05 16:44:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:20,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:20,401 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:20,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:20,605 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:20,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 81 times [2021-06-05 16:44:20,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:20,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364148794] [2021-06-05 16:44:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:20,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364148794] [2021-06-05 16:44:20,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364148794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604168379] [2021-06-05 16:44:20,640 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:20,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:44:20,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:20,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:44:20,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:44:20,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604168379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:20,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:20,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 16:44:20,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188350128] [2021-06-05 16:44:20,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:44:20,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:44:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:44:20,714 INFO L87 Difference]: Start difference. First operand 52260 states and 203094 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:21,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:21,204 INFO L93 Difference]: Finished difference Result 56568 states and 217524 transitions. [2021-06-05 16:44:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:44:21,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:44:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:21,363 INFO L225 Difference]: With dead ends: 56568 [2021-06-05 16:44:21,363 INFO L226 Difference]: Without dead ends: 56556 [2021-06-05 16:44:21,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:44:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56556 states. [2021-06-05 16:44:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56556 to 52394. [2021-06-05 16:44:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8846601645257954) internal successors, (203529), 52393 states have internal predecessors, (203529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203529 transitions. [2021-06-05 16:44:23,275 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203529 transitions. Word has length 28 [2021-06-05 16:44:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:23,275 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203529 transitions. [2021-06-05 16:44:23,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203529 transitions. [2021-06-05 16:44:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:23,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:23,353 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:23,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-06-05 16:44:23,553 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 82 times [2021-06-05 16:44:23,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:23,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998963277] [2021-06-05 16:44:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:23,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:23,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998963277] [2021-06-05 16:44:23,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998963277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:23,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101036424] [2021-06-05 16:44:23,594 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:23,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:23,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:44:23,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101036424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:23,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:23,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:44:23,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307243241] [2021-06-05 16:44:23,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:44:23,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:23,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:44:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:44:23,667 INFO L87 Difference]: Start difference. First operand 52394 states and 203529 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) [2021-06-05 16:44:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:24,200 INFO L93 Difference]: Finished difference Result 56532 states and 217440 transitions. [2021-06-05 16:44:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:44:24,201 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 28 [2021-06-05 16:44:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:24,354 INFO L225 Difference]: With dead ends: 56532 [2021-06-05 16:44:24,355 INFO L226 Difference]: Without dead ends: 56512 [2021-06-05 16:44:24,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:44:24,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56512 states. [2021-06-05 16:44:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56512 to 52394. [2021-06-05 16:44:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52394 states, 52393 states have (on average 3.8845838184490296) internal successors, (203525), 52393 states have internal predecessors, (203525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52394 states to 52394 states and 203525 transitions. [2021-06-05 16:44:25,765 INFO L78 Accepts]: Start accepts. Automaton has 52394 states and 203525 transitions. Word has length 28 [2021-06-05 16:44:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:25,765 INFO L482 AbstractCegarLoop]: Abstraction has 52394 states and 203525 transitions. [2021-06-05 16:44:25,765 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) [2021-06-05 16:44:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 52394 states and 203525 transitions. [2021-06-05 16:44:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:25,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:25,844 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:26,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-06-05 16:44:26,045 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-05 16:44:26,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:26,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134776680] [2021-06-05 16:44:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:26,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134776680] [2021-06-05 16:44:26,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134776680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:26,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67185170] [2021-06-05 16:44:26,082 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:26,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:44:26,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:44:26,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:26,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67185170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:26,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:26,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:44:26,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266817306] [2021-06-05 16:44:26,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:26,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:26,170 INFO L87 Difference]: Start difference. First operand 52394 states and 203525 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:27,069 INFO L93 Difference]: Finished difference Result 57355 states and 221090 transitions. [2021-06-05 16:44:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:44:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:44:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:27,222 INFO L225 Difference]: With dead ends: 57355 [2021-06-05 16:44:27,222 INFO L226 Difference]: Without dead ends: 57342 [2021-06-05 16:44:27,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:44:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57342 states. [2021-06-05 16:44:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57342 to 55127. [2021-06-05 16:44:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55127 states, 55126 states have (on average 3.891321699379603) internal successors, (214513), 55126 states have internal predecessors, (214513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55127 states to 55127 states and 214513 transitions. [2021-06-05 16:44:28,659 INFO L78 Accepts]: Start accepts. Automaton has 55127 states and 214513 transitions. Word has length 28 [2021-06-05 16:44:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:28,659 INFO L482 AbstractCegarLoop]: Abstraction has 55127 states and 214513 transitions. [2021-06-05 16:44:28,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55127 states and 214513 transitions. [2021-06-05 16:44:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:28,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:28,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:28,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-06-05 16:44:28,956 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-05 16:44:28,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:28,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604827565] [2021-06-05 16:44:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:28,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604827565] [2021-06-05 16:44:28,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604827565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573998171] [2021-06-05 16:44:28,993 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:44:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:29,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573998171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:29,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:29,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:44:29,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924784620] [2021-06-05 16:44:29,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:29,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:29,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:29,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:29,084 INFO L87 Difference]: Start difference. First operand 55127 states and 214513 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:29,628 INFO L93 Difference]: Finished difference Result 61086 states and 233937 transitions. [2021-06-05 16:44:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:44:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:44:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:30,247 INFO L225 Difference]: With dead ends: 61086 [2021-06-05 16:44:30,247 INFO L226 Difference]: Without dead ends: 61086 [2021-06-05 16:44:30,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:44:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61086 states. [2021-06-05 16:44:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61086 to 48711. [2021-06-05 16:44:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48711 states, 48710 states have (on average 3.8803736399096693) internal successors, (189013), 48710 states have internal predecessors, (189013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48711 states to 48711 states and 189013 transitions. [2021-06-05 16:44:31,575 INFO L78 Accepts]: Start accepts. Automaton has 48711 states and 189013 transitions. Word has length 28 [2021-06-05 16:44:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:31,575 INFO L482 AbstractCegarLoop]: Abstraction has 48711 states and 189013 transitions. [2021-06-05 16:44:31,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 48711 states and 189013 transitions. [2021-06-05 16:44:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:31,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:31,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:31,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-05 16:44:31,851 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-05 16:44:31,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:31,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827221708] [2021-06-05 16:44:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:31,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:31,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827221708] [2021-06-05 16:44:31,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827221708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:31,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276796902] [2021-06-05 16:44:31,889 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:31,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:31,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:44:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:31,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276796902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:31,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:31,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:44:31,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21533620] [2021-06-05 16:44:31,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:44:31,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:31,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:44:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:44:31,980 INFO L87 Difference]: Start difference. First operand 48711 states and 189013 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:32,563 INFO L93 Difference]: Finished difference Result 53676 states and 205772 transitions. [2021-06-05 16:44:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:44:32,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:44:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:32,708 INFO L225 Difference]: With dead ends: 53676 [2021-06-05 16:44:32,708 INFO L226 Difference]: Without dead ends: 53676 [2021-06-05 16:44:32,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:44:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53676 states. [2021-06-05 16:44:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53676 to 49544. [2021-06-05 16:44:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49544 states, 49543 states have (on average 3.878872898290374) internal successors, (192171), 49543 states have internal predecessors, (192171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49544 states to 49544 states and 192171 transitions. [2021-06-05 16:44:34,015 INFO L78 Accepts]: Start accepts. Automaton has 49544 states and 192171 transitions. Word has length 28 [2021-06-05 16:44:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:34,015 INFO L482 AbstractCegarLoop]: Abstraction has 49544 states and 192171 transitions. [2021-06-05 16:44:34,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 49544 states and 192171 transitions. [2021-06-05 16:44:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:34,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:34,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:34,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:34,292 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-05 16:44:34,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:34,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850442576] [2021-06-05 16:44:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:34,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:34,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850442576] [2021-06-05 16:44:34,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850442576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:34,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364908986] [2021-06-05 16:44:34,337 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:34,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:44:34,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:44:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:34,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364908986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:34,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:34,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:44:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518053521] [2021-06-05 16:44:34,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:44:34,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:44:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:44:34,469 INFO L87 Difference]: Start difference. First operand 49544 states and 192171 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:35,116 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 16:44:35,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:35,477 INFO L93 Difference]: Finished difference Result 52408 states and 201958 transitions. [2021-06-05 16:44:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:44:35,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:44:35,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:35,620 INFO L225 Difference]: With dead ends: 52408 [2021-06-05 16:44:35,620 INFO L226 Difference]: Without dead ends: 52408 [2021-06-05 16:44:35,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 618.3ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:44:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52408 states. [2021-06-05 16:44:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52408 to 49552. [2021-06-05 16:44:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49552 states, 49551 states have (on average 3.8787310044196888) internal successors, (192195), 49551 states have internal predecessors, (192195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49552 states to 49552 states and 192195 transitions. [2021-06-05 16:44:36,924 INFO L78 Accepts]: Start accepts. Automaton has 49552 states and 192195 transitions. Word has length 28 [2021-06-05 16:44:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:36,924 INFO L482 AbstractCegarLoop]: Abstraction has 49552 states and 192195 transitions. [2021-06-05 16:44:36,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 49552 states and 192195 transitions. [2021-06-05 16:44:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:44:37,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:37,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:37,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:37,204 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:37,205 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-05 16:44:37,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:37,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227541948] [2021-06-05 16:44:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:37,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:37,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227541948] [2021-06-05 16:44:37,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227541948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:37,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633219712] [2021-06-05 16:44:37,248 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:37,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:44:37,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:37,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:44:37,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:37,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633219712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:37,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:37,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:44:37,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460321428] [2021-06-05 16:44:37,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:44:37,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:37,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:44:37,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:44:37,346 INFO L87 Difference]: Start difference. First operand 49552 states and 192195 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:37,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:37,833 INFO L93 Difference]: Finished difference Result 51100 states and 197405 transitions. [2021-06-05 16:44:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:44:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:44:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:37,971 INFO L225 Difference]: With dead ends: 51100 [2021-06-05 16:44:37,971 INFO L226 Difference]: Without dead ends: 51100 [2021-06-05 16:44:37,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:44:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51100 states. [2021-06-05 16:44:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51100 to 49446. [2021-06-05 16:44:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49446 states, 49445 states have (on average 3.878471028415411) internal successors, (191771), 49445 states have internal predecessors, (191771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49446 states to 49446 states and 191771 transitions. [2021-06-05 16:44:39,387 INFO L78 Accepts]: Start accepts. Automaton has 49446 states and 191771 transitions. Word has length 28 [2021-06-05 16:44:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:39,388 INFO L482 AbstractCegarLoop]: Abstraction has 49446 states and 191771 transitions. [2021-06-05 16:44:39,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 49446 states and 191771 transitions. [2021-06-05 16:44:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:44:39,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:39,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:39,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:39,664 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-05 16:44:39,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:39,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487566638] [2021-06-05 16:44:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:40,158 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-06-05 16:44:40,300 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 16:44:40,462 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 16:44:40,617 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 16:44:40,742 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 16:44:40,866 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-05 16:44:40,983 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-06-05 16:44:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:41,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:41,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487566638] [2021-06-05 16:44:41,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487566638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:41,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160534852] [2021-06-05 16:44:41,020 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:41,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:44:41,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:44:41,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:41,453 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:44:41,699 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:44:42,288 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 100 [2021-06-05 16:44:42,553 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:44:42,926 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:44:43,183 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_558, A, v_prenex_560, v_prenex_562, v_prenex_564, v_prenex_566], 6=[v_prenex_554, v_prenex_556]} [2021-06-05 16:44:43,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:43,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:43,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:43,198 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 16:44:43,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:43,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:43,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:43,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:44:43,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:43,791 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 143 [2021-06-05 16:44:43,791 INFO L628 ElimStorePlain]: treesize reduction 280, result has 60.3 percent of original size [2021-06-05 16:44:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:43,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:43,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:44:43,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,010 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:44:44,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:44,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:44,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:44:44,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:44:44,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,213 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:44:44,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:44:44,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:44:44,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,390 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:44:44,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:44,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:44:44,399 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,544 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:44:44,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:44,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:44:44,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,691 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:44:44,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:44:44,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:44:44,701 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,829 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:44:44,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:44,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-06-05 16:44:44,838 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:44,959 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:44:44,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:44,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-05 16:44:44,964 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:757, output treesize:114 [2021-06-05 16:44:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:45,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160534852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:45,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:45,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:44:45,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311160432] [2021-06-05 16:44:45,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:44:45,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:45,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:44:45,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:44:45,069 INFO L87 Difference]: Start difference. First operand 49446 states and 191771 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:45,516 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 44 [2021-06-05 16:44:45,912 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 104 [2021-06-05 16:44:46,077 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 16:44:46,599 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 79 [2021-06-05 16:44:46,964 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 66 [2021-06-05 16:44:47,355 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-06-05 16:44:47,943 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2021-06-05 16:44:48,606 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 84 [2021-06-05 16:44:48,878 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 16:44:49,081 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-05 16:44:49,660 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 96 [2021-06-05 16:44:50,165 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2021-06-05 16:44:50,699 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 112 [2021-06-05 16:44:51,843 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 197 DAG size of output: 153 [2021-06-05 16:44:52,315 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-06-05 16:44:52,758 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2021-06-05 16:44:53,155 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-05 16:44:53,301 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 48 [2021-06-05 16:44:53,684 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-06-05 16:44:54,091 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-05 16:44:54,444 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2021-06-05 16:44:54,913 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2021-06-05 16:44:55,103 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 42 [2021-06-05 16:44:55,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:55,407 INFO L93 Difference]: Finished difference Result 57718 states and 215952 transitions. [2021-06-05 16:44:55,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:44:55,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:44:55,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:55,545 INFO L225 Difference]: With dead ends: 57718 [2021-06-05 16:44:55,545 INFO L226 Difference]: Without dead ends: 57628 [2021-06-05 16:44:55,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 11878.2ms TimeCoverageRelationStatistics Valid=458, Invalid=1992, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:44:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57628 states. [2021-06-05 16:44:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57628 to 49581. [2021-06-05 16:44:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49581 states, 49580 states have (on average 3.8776926179911255) internal successors, (192256), 49580 states have internal predecessors, (192256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49581 states to 49581 states and 192256 transitions. [2021-06-05 16:44:56,807 INFO L78 Accepts]: Start accepts. Automaton has 49581 states and 192256 transitions. Word has length 30 [2021-06-05 16:44:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:56,807 INFO L482 AbstractCegarLoop]: Abstraction has 49581 states and 192256 transitions. [2021-06-05 16:44:56,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 49581 states and 192256 transitions. [2021-06-05 16:44:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:44:56,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:56,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:57,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:57,092 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-05 16:44:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498988313] [2021-06-05 16:44:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:57,459 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-05 16:44:57,651 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 16:44:57,837 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 16:44:57,967 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 16:44:58,094 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 16:44:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:58,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:58,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498988313] [2021-06-05 16:44:58,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498988313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:58,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874982556] [2021-06-05 16:44:58,204 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:58,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:44:58,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:58,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:44:58,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:58,626 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:44:58,885 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:44:59,177 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-06-05 16:44:59,661 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-06-05 16:44:59,909 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:45:00,739 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 131 [2021-06-05 16:45:00,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:00,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:00,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:45:00,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:01,295 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 155 [2021-06-05 16:45:01,296 INFO L628 ElimStorePlain]: treesize reduction 86, result has 82.7 percent of original size [2021-06-05 16:45:01,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:01,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:45:01,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:01,509 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-05 16:45:01,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:01,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:45:01,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:01,706 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:45:01,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:01,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:45:01,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:01,892 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-05 16:45:01,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:01,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:01,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:45:01,903 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:02,066 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:45:02,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:02,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:45:02,078 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:45:02,234 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 16:45:02,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:45:02,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:45:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:45:02,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:45:02,245 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-06-05 16:45:02,370 WARN L222 SmtUtils]: Removed 16 from assertion stack [2021-06-05 16:45:02,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-05 16:45:02,571 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:45:02,573 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:45:02,574 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:45:02,574 INFO L202 PluginConnector]: Adding new model max-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:45:02 BasicIcfg [2021-06-05 16:45:02,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:45:02,575 INFO L168 Benchmark]: Toolchain (without parser) took 756046.61 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 334.0 MB in the beginning and 10.1 GB in the end (delta: -9.7 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-06-05 16:45:02,575 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 335.2 MB in the beginning and 335.0 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:45:02,575 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.88 ms. Allocated memory is still 354.4 MB. Free memory was 333.9 MB in the beginning and 332.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:45:02,575 INFO L168 Benchmark]: Boogie Preprocessor took 19.83 ms. Allocated memory is still 354.4 MB. Free memory was 332.4 MB in the beginning and 331.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:45:02,575 INFO L168 Benchmark]: RCFGBuilder took 279.21 ms. Allocated memory is still 354.4 MB. Free memory was 331.3 MB in the beginning and 318.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 16:45:02,575 INFO L168 Benchmark]: TraceAbstraction took 755723.23 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 318.2 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-06-05 16:45:02,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 335.2 MB in the beginning and 335.0 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.88 ms. Allocated memory is still 354.4 MB. Free memory was 333.9 MB in the beginning and 332.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.83 ms. Allocated memory is still 354.4 MB. Free memory was 332.4 MB in the beginning and 331.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 279.21 ms. Allocated memory is still 354.4 MB. Free memory was 331.3 MB in the beginning and 318.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 755723.23 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 318.2 MB in the beginning and 10.1 GB in the end (delta: -9.8 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 124ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 124ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 124ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 99 for 124ms.. - 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: 755576.5ms, OverallIterations: 259, TraceHistogramMax: 3, EmptinessCheckTime: 6447.1ms, AutomataDifference: 389715.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 53.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11376 SDtfs, 72395 SDslu, 87453 SDs, 0 SdLazy, 139525 SolverSat, 13156 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 79335.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16547 GetRequests, 5440 SyntacticMatches, 240 SemanticMatches, 10867 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183282 ImplicationChecksByTransitivity, 345699.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55127occurred in iteration=253, InterpolantAutomatonStates: 9655, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 93783.2ms AutomataMinimizationTime, 258 MinimizatonAttempts, 1314384 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1082.8ms SsaConstructionTime, 2749.8ms SatisfiabilityAnalysisTime, 199125.8ms InterpolantComputationTime, 13686 NumberOfCodeBlocks, 13686 NumberOfCodeBlocksAsserted, 891 NumberOfCheckSat, 13173 ConstructedInterpolants, 159 QuantifiedInterpolants, 249460 SizeOfPredicates, 1130 NumberOfNonLiveVariables, 17800 ConjunctsInSsa, 3786 ConjunctsInUnsatCore, 513 InterpolantComputations, 3 PerfectInterpolantSequences, 1026/4322 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